FRINGE PROJECTION THREE-DIMENSIONAL MEASUREMENT METHOD APPLICABLE TO DETECTION OF HIGH-REFLECTIVE FOREIGN OBJECT IN TRANSMISSION OF COAL MINE BELT CONVEYOR
A fringe projection three-dimensional measurement method applicable to detection of a high-reflective foreign object (2) in transmission of a coal mine belt conveyor (6), comprising the following steps: projecting two grayscale images onto the surface of a foreign object (2), a camera acquiring an image, calculating ambient light intensity and surface reflectivity, and further calculating adaptive projection intensity in a camera coordinate system; projecting a speckle image, optimizing an acquired speckle image according to the reflectivity, and establishing a pixel matching relationship between the projection and the acquired image; according to the pixel matching relationship, enabling the adaptive projection intensity in the camera coordinate system to correspond to that in a projector coordinate system, further generating an adaptive projection fringe pattern, projecting same onto the surface of the foreign object (2), and measuring three-dimensional information of the foreign object (2); and detecting the foreign object (2) on the surface of a belt conveyor (6) according to the three-dimensional information. The present invention avoids the problem of a measurement failure during measurement of high-reflective objects by using conventional fringe projection three-dimensional measurement methods, and is applicable to measurement of metal foreign objects (2) such as an anchor rod and an iron wire mesh on the surface of the belt conveyor (6).
G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object
The present invention relates to a small-size high-rotation-speed drill for mechanical reaming and dust-free operations, comprising a main unit body, a working mechanism, a harmonic speed reduction apparatus, an inserting and supporting device, a drainage tube pressure transmitter, a dust collecting apparatus, track traveling apparatuses, a drill pipe frame, and an electric pump conversion box; the track travelling apparatuses are fixed to both sides of the main unit body; the working mechanism is provided above the main unit body, and the electric pump conversion box is provided above the main unit body; the main unit body comprises a main unit frame, a mounting plate is provided on the main unit frame, the mounting plate is connected to the working mechanism by means of a slewing reduction apparatus, the electric pump conversion box is provided on one side of the working mechanism, and the drill pipe frame is connected in front of the mounting plate; and the working mechanism is connected to a vertical slewing reducer, and the vertical slewing reducer is connected to the harmonic speed reduction apparatus. According to the present invention, a harmonic reducer is used to drive a rack and a pinion to implement vertical up-down movement, operation is more stable, and the problems of shaking and instability caused by the high-rotation-speed drill are solved.
An optical fiber current sensor system for underground spaces such as coal mines and the like. Said sensor system comprises a magnetic circuit unit and an acquisition unit, the magnetic circuit unit comprising a wire (1), a magnetizer (2), a coil (3), a direct-current stabilized voltage supply (4), a magnetostrictive composite material magnetic induction element (5) and a fiber grating (6), and the acquisition unit comprising a fiber grating demodulator (7) and a computer (8). The magnetostrictive composite material magnetic induction element (5) is configured to be of a symmetrical stepped beam structure. One end of the magnetizer (2) is configured to be of a stepped structure, while the other end thereof is configured to be of a planar structure. The coil (3) is connected to the direct-current stabilized voltage supply (4). An output current of the direct-current stabilized voltage supply (4) supplies a bias magnetic field to the magnetostrictive composite material magnetic induction element (5) by means of the coil (3). A sensor achieves magnetism gathering by means of the stepped design of the magnetostrictive material magnetic induction element (5) and the magnetizer (2), thereby remarkably increasing the sensitivity of the sensor. In addition, different bias magnetic fields are applied by means of the adjustable coil (3), so that the sensor has linearity in different measurement ranges, thereby expanding the range of linearity.
G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
5.
STRESS TRANSFER METHOD AND DEVICE FOR LOW-POSITION ROOF CUTTING AND HIGH-POSITION DIRECTIONAL FRACTURING OF GOB-SIDE ENTRY RETAINING
Disclosed in the present invention are a stress transfer method and device for low-position roof cutting and high-position directional fracturing of gob-side entry retaining. A low-position immediate roof is subjected to directional fracturing by a dense linear sleeve fracturing method and the like, so that the length of a lateral cantilever of the immediate roof is shortened, and the stress transfer from a gob roof to an entry retaining roof brought by hanging the immediate roof is weakened; a high-position main roof is subjected to fracturing by a directional fracturing method, so that the original gob roof stress transferred by the main roof is weakened, the load applied to entry retaining surrounding rock is reduced to the maximum extent from the source, and ultimately, the objectives of implementing immediate roof cutting entry retaining by low-position sleeve fracturing and implementing stress transfer by high-position directional fracturing of the main roof are achieved, thereby reducing the deformation of gob-side entry retaining surrounding rock. Also disclosed is a main machine-slidable drilling and fracturing all-in-one equipment, comprising: mounting a fracturing pump on a drilling machine travelling mechanism, and additionally providing a sliding rail to enable a main machine to slide forward and backward along the sliding rail. The consistency of inclination parameters for dense drilling of a low-position rock formation is ensured, and an eccentricity error is prevented from occurring and affecting the effect of entry retaining via roof cutting; moreover, the number of movements of a drilling machine is reduced, and the construction efficiency is improved.
E21C 37/12 - Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
E21B 43/26 - Methods for stimulating production by forming crevices or fractures
E21B 7/02 - Drilling rigs characterised by means for land transport, e.g. skid mounting or wheel mounting
Disclosed in the present invention is a high-salinity mine water treatment device, comprising: a primary treatment mechanism, which comprises a sewage tank and an aeration processor, wherein the aeration processor is in communication with the sewage tank, an end of the aeration processor away from the sewage tank is in communication with a sewage sedimentation tank, an end of the sewage sedimentation tank away from the aeration processor is in communication with a filter, an end of the filter away from the aeration processor is in communication with a first evaporator, and an end of the first evaporator away from the filter is in communication with a buffer tank; and a secondary treatment mechanism, which comprises an ion exchanger, wherein the ion exchanger is in communication with the buffer tank, an end of the ion exchanger away from the buffer tank is in communication with a concentrated water sedimentation tank, an end of the concentrated water sedimentation tank away from the ion exchanger is in communication with a decarburization tower, an end of the decarburization tower away from the concentrated water sedimentation tank is in communication with a first reverse osmosis device, and an end of the first reverse osmosis device away from the decarburization tower is in communication with a second evaporator. In the present invention, different impurities in sewage are removed in steps, impurities in a final product are reduced, and the removal of the impurities in stages facilitates treatment.
A rock stratum fracturing method and equipment using a variable-frequency pulse fracture network. The fracturing method comprises: first, determining an initial pulse pressure peak of each rock stratum according to the physical and mechanical properties and the confining pressure of each rock stratum, and determining a pulse frequency of each rock stratum according to a collision force measurement experiment for each rock stratum; then, according to the initial pulse pressure peak and the pulse frequency, designing a fracturing pumping scheme using a variable-frequency pulse fracture network, and according to different operating conditions, designing a rock stratum fracturing drill hole arrangement scheme using a variable-frequency pulse fracture network; and finally, according to the drill hole arrangement scheme, punching a fracturing hole, and performing fracturing according to the fracturing pumping scheme. The rock stratum fracturing equipment using a variable-frequency pulse fracture network comprises a pumping-mode-variable and frequency-variable fracturing pump (4), a hydraulic fracturing measurement and control instrument (13), an automatic packer (21), a mechanical rod feeding machine (19) and a two-way water injection steel pipe (20). By means of the rock stratum fracturing method and equipment using a variable-frequency pulse fracture network, a plurality of annular fracture network structures can be formed near a drill hole from near to far and stage by stage, and are finally sequentially stacked into a relatively large-range fracture network, thereby fully breaking up a relatively large-range rock mass.
Disclosed in the present invention is a method for purifying a biological dust suppressant by means of two-stage ultrafiltration, wherein a target product is separated and purified by means of two-stage ultrafiltration utilizing the differences of various substances in a fermentation liquid in terms of physical characteristics, such as solubility and molecular morphology. The method comprises: subjecting a fermentation liquid to a centrifugal pretreatment to separate off insoluble substances such as microbial cells; allowing the centrifuged fermentation liquid to pass through a first-stage ultrafiltration membrane, thereby intercepting polysaccharides, lactic acid, biological dust suppressant molecules in an aggregation form, etc., the molecular weights of which being larger than 20 kD; adding organic solvents of methanol and ethyl acetate to the retention liquid to dilute same, and further filtering the resulting liquid by means of an ultrafiltration membrane capable of intercepting substances which have a molecular weight greater than 10 kD to obtain a liquid product; and finally subjecting same to rotary evaporation and constant-temperature drying to prepare a solid purified material. The present purification method fully utilizes the differences of various components in the fermentation liquid in terms of physical properties, can effectively improve the separation and purification efficiency and purity of the product, reduce toxic and harmful substances generated during the separation and purification process and lower the cost of the production process, and can be widely used as a purification process during the production and preparation processes of biological dust suppression materials.
B01D 3/08 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs
C09K 3/22 - Materials not provided for elsewhere for dust-laying or dust-absorbing
A method for shale gas exploitation includes performing horizontal drilling operation on an area to be constructed, forming a crack around a horizontal drill hole wall by shaped charge perforation; expanding the crack around a horizontal hole hydraulic fracturing, and extracting methane gas after a fracturing fluid is discharged; after methane gas is reduced, performing in-situ combustion explosion fracturing on the methane involved in horizontal drilling; thereafter continuing to expand the crack in the horizontal drill hole such that methane continues to seep out, and continuing extracting methane; repeating combustion explosion fracturing and extraction operations, so as to increase combustion explosion cracking permeability, and greatly enhance the exploitation effect of shale gas. The method is suitable for fracturing reconstruction of unconventional oil and gas reservoirs such as shale gas reservoirs, coal seam gas reservoirs and tight sandstone gas reservoirs.
E21B 43/248 - Combustion in situ in association with fracturing processes using explosives
E21B 43/263 - Methods for stimulating production by forming crevices or fractures using explosives
E21B 49/00 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
10.
HIGH-PRESSURE LARGE-FLOW HIGH-WATER-BASED CARTRIDGE-TYPE DIGITAL THROTTLE VALVE AND CONTROL METHOD
A high-pressure large-flow high-water-based cartridge-type digital throttle valve and a control method, the throttle valve comprising a main valve and pilot valves. The main valve uses a symmetrical cylinder type structure and is provided with an upper control chamber and a lower control chamber which are symmetrical. The pilot valves use a structure of a pair of two-position two-way cartridge-type normally-closed ball valves; each pilot valve uses a normally-open high-speed switching valve as a driver, and controls, by using a PWM signal, the quantity of flow flowing into or out of the main valve lower control chamber, so as to control the pressure of the main valve lower control chamber and overcome a spring force of the main valve, thus pushing the main valve element to move; and a displacement sensor is used for achieving closed-loop accurate control over a displacement of the main valve. The main valve is a cone valve, and the pilot valves and the driver are all ball valves, so that said throttle valve has good sealing and no leakage under a high-water-based or pure-water medium. The pilot valves use two two-position two-way valves which are simple in structure, and processing, assembling and control are easy; the high-speed switching valve is used as the driver, which is inexpensive and highly-resistant to pollution, and has a large output force; and mechanical structures, such as levers or ball screws do not need to be introduced.
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
F16K 11/10 - Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves; Arrangement of valves and flow lines specially adapted for mixing fluid with two or more closure members not moving as a unit
11.
UNMANNED AERIAL VEHICLE-AIDED OVER-THE-AIR COMPUTING SYSTEM BASED ON FULL-DUPLEX RELAY AND TRAJECTORY AND POWER OPTIMIZATION METHOD THEREOF
Disclosed is an unmanned aerial vehicle (UAV)-aided over-the-air computing system based on full-duplex relay and a trajectory and power optimization method thereof. The UAV-aided over-the-air computing system adopts the UAV as a full-duplex relay for data fusing and forwarding. The method of the application aims at minimizing an average mean square error of over-the-air computing, and solves an optimization problem under constraints of sensor transmitting power, information transmission rate, UAV trajectory and denoising factor. For an overall joint optimization problem, each optimization variable is determined one by one by an alternative optimization method according to the high coupling of optimization variables.
An isolated overburden grouting filling method for coal gangue underground emission reduction includes determining a grouting filling key stratum according to information of a coal face; constructing a directional borehole from an underground tunnel to the inside of the grouting filling key stratum; constructing a plurality of branch holes downward in a main hole of the directional borehole; and by establishing a grouting filling system under a mine, gangue obtained from excavation gangue of the mine and gangue sorting being made into a filling slurry by means of breaking and grinding, and the filling slurry filling fractures below the key stratum through the directional borehole. The gangue generated from a mine is directly made into a filling slurry under the mine and then fills overburden mining-induced fractures, thereby achieving harmless disposal of the gangue, effectively supporting a key stratum, and controlling stratum movement and surface subsidence.
Disclosed in the present invention are a spiral cone self-diagnosis pressure reduction system for a weightlessness scale and a self-diagnosis method thereof. The system comprises a suspension frame fixed in a metering bin; a supporting platform is fixed on a bottom plate of the suspension frame; a plurality of coils are provided on the supporting platform and fixed to a base; a spiral cone is rotatably connected to the base; the spiral cone is rotatably connected to the upper end of the base and a base body of the spiral cone is in the shape of a bamboo hat; the upper end of the spiral cone corresponds to a feeding port of the metering bin, and the outer surface of the spiral cone is provided with a spiral blade. According to the present invention, the rotatable spiral cone is used for reducing the pressure of high-speed materials, and the contact positions of the materials and the spiral blade are changed constantly, so that the wear of the materials on the spiral cone is uniformly distributed; the materials are more uniformly dispersed in the metering bin due to being subjected to the rotation of the spiral blade, thereby avoiding the contact wear on a fixed region of the metering bin; and by means of feedback information of a display control unit and an alarm unit, a worker is reminded to replace the spiral cone in time.
G01N 27/00 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/32 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
14.
FLY ASH-BASED FIRE-PREVENTION AND EXTINGUISHING MATERIAL WITH CARBON DIOXIDE MINERALIZED AND STORED, AND PREPARATION METHOD THEREOF
A fly ash-based fire-prevention and extinguishing material with carbon dioxide mineralized and stored, and a preparation method thereof are provided. The preparation method includes: separately weighing 100 parts to 120 parts of water, 1 part to 3 parts of a solid strong alkali, and 20 parts to 40 parts of a fly ash as raw materials, pouring the raw materials into a reactor successively to obtain a resulting mixture, and stirring the resulting mixture at a high rotational speed; adding 10 parts to 20 parts of a solubilizing agent to the reactor, sealing the reactor, introducing carbon dioxide to the reactor at room temperature to maintain a carbon dioxide pressure to obtain a resulting slurry, and stirring the resulting slurry at a high rotational speed; and further introducing carbon dioxide into the reactor to increase the carbon dioxide pressure, and stirring the resulting slurry at a low rotational speed.
A62D 1/06 - Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
15.
COOPERATIVE CONTROL METHOD FOR MULTI-CHANNEL BRAKING SYSTEM OF MINE HOIST
A cooperative control method for a multi-channel braking system of a mine hoist. The abrasion loss of a brake shoe is obtained by means of detecting, in real time, position information of the brake shoe of each disk brake; an abrasion grade is divided by means of the abrasion degree of the brake shoe; three braking force distribution modes, namely, equal distribution, proportional distribution and exponential distribution, are formulated according to the abrasion grade, so as to dynamically adjust a set braking pressure of each disk brake; and each disk brake tracks and controls the set braking pressure by using a feedback pressure signal of an oil pressure sensor and using a pressure closed-loop control method. Therefore, the cooperative braking control which is based on the abrasion loss of a brake shoe and over a multi-channel braking system of a mine hoist is realized, and the problems of the service life of one or more disk brakes being shortened, the braking performance thereof being reduced, the braking thereof failing, etc., due to uneven abrasion of brake shoes are prevented, such that the usage safety and reliability of the braking system are improved.
The present disclosure discloses a time service and positioning network system for an underground chain-shaped large space in a coal mine. The system adopts a base station-level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad-hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method. The system integrates the time service and positioning network system suitable for the underground coal mine and expands the network applicability based on an existing underground communication ring network.
A method and system for reducing the discharge fluctuation of spirally conveying materials for a weightless scale. The method comprises the following steps: 1, optimizing a conveying parameter of a spiral conveyor by means of other optimization algorithms such as a genetic algorithm, so as to ensure a relatively high conveying capacity; 2, optimizing a structural parameter of a funnel (302) by means of other optimization algorithms such as the genetic algorithm, so as to reduce the fluctuation of the quantity of materials falling from a discharge port of the funnel (302); and 3, providing an anti-blocking mechanism to monitor, in real time, materials in the funnel (302) and process the problem of material blocking. The method and system can effectively reduce the fluctuation of outputting materials, and ensure a high material conveying capacity, thereby improving the efficiency of process production.
Disclosed in the present invention is a roadway surrounding rock stress state detection method based on three-dimensional potential response. The method comprises: collecting potential data of each potential measurement point in a drill hole; then, spreading a roadway contour as a plane along a side line of the strike of a roadway; performing spatial interpolation on all potential measurement points, so as to obtain a three-dimensional potential imaging body, and extracting and drawing a three-dimensional abnormal potential isosurface model; and performing unilateral inversion on an outer side of a drilling area by means of potential measurement points on a potential measurement line at the highest position, and extracting and drawing a three-dimensional abnormal potential inversion probability isosurface model by using a radial basis function surface interpolation method. In the present invention, a three-dimensional potential response digital model, which is jointly formed by a three-dimensional abnormal potential isosurface model and a three-dimensional abnormal potential inversion probability isosurface model, visualizes spatial potential distribution features of roadway surrounding rocks, clearly presents a spatial range, a strike and a development trend of an area in which stress is abnormal, and accurately distinguishes and determines an area for roadway stress state and abnormal potential response.
Disclosed is a massive data-driven method for automatically locating a mine microseismic source, including: constructing a microseismic wave calibration data set by using a large-scale seismic data set containing seismic signals and non-seismic signals; constructing a pre-training calibration model based on a full convolution neural network through deep learning of a seismic wave calibration data set; using microseismic data of mine sites for transfer learning of an initial arrival time calibration model to construct an arrival time automatic calibration model suitable for mine microseismic signals; and automatically as well as accurately locating mine microseismic events based on an isokinetic homogeneous isotropic velocity model by using an optimization algorithm to deduce arrival time errors and through repeated iteration and fine-tuning.
A control method for composite metal ions in a solid waste landfill, relating to the field of metal pollution treatment in solid waste landfills. Permeable adsorption walls capable of adsorbing harmful substances in leachate are built around a solid waste landfill. If the solid waste landfill is arranged against a mountain, there is only a need to build a permeable adsorption wall on the outer side surface of the solid waste landfill not surrounded by the mountain, and if groundwater exists beneath the solid waste landfill, the built permeable adsorption wall needs to extend underground to an underground aquiclude so as to prevent leachate in the solid waste landfill from flowing out along with the groundwater. The permeable adsorption wall sequentially consists of an inherent soil layer, an inherent soil layer and attapulgite mixed layer, an inherent soil layer and attapulgite @ manganese dioxide mixed layer, an inherent soil layer and attapulgite @ copper sulfide mixed layer, and an inherent soil layer.
The present invention discloses a method for controlling composite metal ions in a solid waste dump, and belongs to the field of metal pollution treatment for solid waste dumps. A permeable adsorption wall that can adsorb the harmful substances in a leachate is built up around a solid waste dump; specifically, if the solid waste dump is arranged against a mountain, it is only necessary to build up the permeable adsorption wall around the outer side of the solid waste dump that is not surrounded by the mountain; if there is subterranean water below the solid waste dump, the constructed permeable adsorption wall must extend downward to a subterranean aquiclude to prevent the leachate of the solid waste dump from flowing out with subterranean water; the permeable adsorption wall is composed of a raw soil layer, a mixed layer of raw soil layer and an attapulgite clay , a mixed layer of raw soil layer and an attapulgite clay @ manganese dioxide a mixed layer of raw soil layer and an attapulgite clay @ copper sulfide , and a raw soil layer , which are arranged sequentially . This method can realize stable and efficient entrapment and removal of harmful metals, provide a product with strong stability, flexible operation, and green ness , and has a high technical guidance and application significance for the water pollution control on composite metal ions produced in coal mining and non ferrous metal smelting and heap leaching processes.
A high-precision positioning system for a monorail hoist in a mine includes two gear carriers symmetrically arranged on both sides of an I-beam track. Each of the gear carriers includes a positioning wheel and a plurality of travelling wheels. The travelling wheels are travelling on an upper end face of a bottom plate of the I-beam track, and the positioning wheel is in engagement transmission with a rack at a lower end of the bottom plate of the I-beam track. The gear carriers include an installation bracket and a connecting seat configured to connect the monorail hoist. The installation bracket includes an inertial measuring unit and a single-chip microcomputer that are electrically connected with each other. The positioning wheel includes a rotation angle sensor and the rotation angle sensor is electrically connected to the single-chip microcomputer. A headstock at both ends of the monorail hoist includes a coordinate updating unit.
The present disclosure provides a method for regulating a quality of an oil derived from plastic wastes by supercritical hydrothermal liquefaction, including catalyst synthesis, calcination, and supercritical hydrothermal liquefaction. In the present disclosure, a catalyst is prepared by the method, and then applied in regulating the quality of the oil derived from plastic wastes by supercritical hydrothermal liquefaction. This not only reduces cost, but also optimizes a reaction process, such that plastics can be recycled as resources, thereby reducing the carbon emissions and promoting the development of circular economy. The method has strong practicability and functionality, and can be widely used in the technical fields of harmless treatment and resource utilization of plastic waste.
C10G 11/02 - Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
B01J 23/78 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with alkali- or alkaline earth metals or beryllium
Provided is an industrial process soft sensor method based on a federated stochastic configuration network, including: acquiring historical industrial process auxiliary data and corresponding product quality data; finding out optimal hidden layer parameters; processing, by a central server, to obtain global parameters, and downloading same to each factory as hidden layer parameters for a local model; obtaining output weights of a current network through an optimization algorithm, and uploading same to the server for weighted aggregation; and when the number of hidden layer nodes in a current network exceeds a maximum given value or a residual in current iteration meets an expected tolerance, completing modeling to obtain the global federated stochastic configuration network without adding new nodes. The present disclosure effectively improves prediction performance of models and protects data privacy, thus meeting industrial process soft sensor requirements.
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
A liquid explosive for in-situ explosive fracturing in low-permeability oilfields and application thereof are provided. The liquid explosive includes raw materials in parts by mass: a main explosive with positive oxygen balance, a guest regulator and isolation microcapsules; the main explosive with the positive oxygen balance includes raw materials in parts by mass: monomethylamine nitrate, ammonium nitrate, sodium nitrate, water, guar gum, sodium nitrite, a high-temperature resistant regulator with a low detonation velocity and a surfactant; the guest regulator includes raw materials in parts by mass: a reducing agent and a density regulator; the isolation microcapsules include raw materials in parts by mass: porous hollow microbeads, a pore plugging agent and wall materials of pressure-resistant microcapsules; the guest regulator exists in the porous hollow microbeads of the isolation microcapsules.
A method and a system for simulating contact and interaction between a support member and a chamber surrounding rock mass are provided in the application. The method includes: obtaining a support scheme of a roadway to be simulated, dividing the roadway to be simulated based on the support scheme to obtain several roadway sections; obtaining physical and mechanical parameters of each rock stratum in each roadway section and an occurrence state of the roadway surrounding rock; constructing particle flow numerical models corresponding to the roadway section; through the particle flow numerical models of every two adjacent roadway sections, obtaining a particle flow meso-structural evolution model of the roadway to be simulated; obtaining meso-mechanical parameters of the roadway to be simulated based on the particle flow numerical models, calibrating the meso-mechanical parameters through the physical and mechanical parameters, establishing the particle flow meso-structural evolution model of the roadway to be simulated.
A method for extracting and recovering gold from an aqueous solution, the method comprising the following steps: (1) extracting gold from a water body by means of electric flocculation, wherein by using an electrolytic cell, gold in an aqueous solution is captured by means of a hydroxide of iron, which is generated in situ by means of an electric flocculation reaction, and is reduced in situ into gold nanoparticles; (2) pickling and dissolving the precipitated iron sludge, wherein the obtained precipitate is dissolved in nitric acid, and after a washing treatment, iron flocs dissolve; and (3) separating and recovering gold by means of a nanofiltration membrane system, wherein the pickled solution of the obtained precipitated iron sludge is subjected to an interception treatment by using a nanofiltration membrane, so as to separate the solution and a nanogold elementary substance, and the latter is washed with water to obtain a gold elementary substance. The extraction and recovery method has the characteristics of a high gold extraction efficiency, a low cost, a simple technological process, high stability and being environmentally friendly; in addition, the method can achieve high-grade recovery of a gold elementary substance, and has relatively strong technical guidance and practical engineering application significance for extraction and recovery of gold during various gold smelting and extraction processes.
The present disclosure provides a method for extracting and recovering gold from an aqueous solution, the method including: (1) gold extraction from an aqueous solution through electrocoagulation, in which an electrocoagulation reaction is performed in an electrolytic cell to produce iron hydroxide in-situ, so as to capture gold in the aqueous solution and reduces the gold into gold nanoparticles in-situ; (2) pickling and liquefaction of the precipitated iron sludge, in which the obtained precipitate is dissolved in nitric acid to dissolve iron flocs after washing treatment; and (3) separation and recovery of gold through a nanofiltration membrane system, in which the resulting solution after pickling the precipitated iron sludge is subjected to cut-off treatment using a nanofiltration membrane to separate nano-sized elemental gold from the solution, and then the resultant is washed with water to obtain elemental gold. The extraction and recovery method of the present disclosure has characteristics of high gold extraction efficiency (up to 100%), low cost, simple process, good stability and environmental protection, and can recover high-grade elemental gold (with a comprehensive recovery rate greater than 95%). The method is of an important significance for technical guidance and practical engineering application for the extraction and recovery of gold in various gold smelting and extraction processes.
B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
STATE KEY LABORATORY OF SHIELD MACHINE AND BORING TECHNOLOGY (China)
CHINA RAILWAY TUNNEL GROUP CO., LTD. (China)
CHINA UNIVERSITY OF MINING AND TECHNOLOGY (China)
Inventor
Yang, Zhenxing
Zeng, Chuigang
Zhang, Kai
Zhao, Yi
Li, Fengyuan
Zhao, Hailei
Wang, Liming
You, Jinhu
Wang, Jun
Zhai, Qianzhi
Feng, Huanhuan
Xie, Tao
Guo, Xinqiang
Jiao, Yifeng
Zhang, Haitao
Abstract
A boring machine structure achieving front support, and a working method, aiming at providing a boring machine structure which achieves front support and is more compact. A front shield (3) is provided behind a cutterhead (1), and is in the shape of a truncated pyramid; a protective net assembly mechanism is provided outside the front shield; an outer shield (7) is provided behind the protective net assembly mechanism; the structure of the cutterhead (1) is internally provided with a rock slag leading-out channel (2), which is connected to a feeding end of a rock slag conveying mechanism (4); a protective housing (6) is sleeved outside the rock slag conveying mechanism (4); and supporting shoes (8) and a support assembly conveying platform (9) are provided behind the outer shield (7) and on the protective housing (6).
E21D 9/087 - Making by using a driving shield with additional boring or cutting means with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
E21D 9/04 - Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
E21D 9/12 - Devices for removing or hauling away excavated material or spoil; Working or loading platforms
E21D 11/20 - Special cross-sections, e.g. corrugated
E21D 11/40 - Devices or apparatus specially adapted for handling or placing units of linings for tunnels or galleries
31.
HIGH-ENTROPY ALLOY-BASED NANO SUPER-HARD COMPOSITE MATERIAL REINFORCED BY EMBEDDED PARTICLES, AND PREPARATION METHOD THEREFOR
The present application relates to the technical field of metal-based composite materials. Disclosed are a high-entropy alloy-based nano super-hard composite material reinforced by embedded particles, and a preparation method therefor. Reinforcing-phase particles and a high-entropy alloy matrix in the composite material have good wettability and have good interface bonding, such that the wear resistance of the composite material can be improved, and the shedding of reinforcing-phase particles during friction can be effectively avoided. The composite material comprises a high-entropy alloy matrix and reinforcing-phase particles, wherein the reinforcing-phase particles are dispersed in the high-entropy alloy matrix; the high-entropy alloy matrix comprises a basic matrix and a reinforcing matrix, the basic matrix comprising Al, Co, Cr, Fe, Ni and Mn, and the reinforcing matrix comprising Mo, Nb and Zr; and the reinforcing-phase particles comprise WC and TiC.
C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
B22F 9/04 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
B82Y 40/00 - Manufacture or treatment of nanostructures
Disclosed in the present invention is a hoisting wire rope tension measurement method based on visual vibration frequency identification, the method comprising: processing an operation vibration image of a hoisting wire rope collected by an orthographic binocular camera, and, according to a vibration inherent frequency of the hoisting wire rope, calculating the tension borne thereby, thus completing real-time measurement of the tension of the hoisting wire rope. The present invention improves the anti-interference performance of an algorithm by means of oblique rectangle fitting, and increases the measurement precision of the algorithm by means of an absolute mean value data defective point cleaning method based on difference theory, thereby achieving a good measurement effect.
A hoist for transferred materials in an underground auxiliary transportation system and a method thereof. The hoist includes a hoist body, guiding plates mounted at two ends of the hoist body through bolts, twist locks mounted at four ends of the hoist body, a driving unit configured to drive twist locks to rotate, transmission assemblies configured to connect the twist locks with the driving unit, ejector pins configured to prevent the twist locks from rotating mistakenly, and a sensor configured to control the hoist to operate and provide protection safety.
B66C 1/66 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
Disclosed are a mine underground fracturing and proppant injection integrated apparatus and a construction method. The apparatus comprises a fracturing system and a proppant injection system. The apparatus can implement fracturing and sand-injection methods, such as high-pressure fracturing and continuous sand injection, high-pressure fracturing and pulsed sand injection, high-pressure fracturing and multi-particle-diameter/multi-type sand injection, pulsed fracturing and continuous sand injection, pulsed fracturing and pulsed sand injection, and pulse fracturing and multi-particle-diameter/multi-type sand injection, which can meet multiple mine underground requirements for fracturing and sand-injection manners. Therefore, the apparatus is universal.
The present invention belongs to the field of electric motor designs. Disclosed are an axial magnetic flux switch reluctance electric motor with a full-pitch winding, and a multi-objective optimization method therefor. The axial magnetic flux switch reluctance electric motor comprises a rotating shaft, wherein an electric motor iron core is arranged on the rotating shaft; the electric motor iron core comprises a left stator, a rotor and a right stator, which are sequentially arranged and are of annular structures; the rotating shaft is connected, by means of bearings, to end covers, on which the left stator and the right stator are fixedly mounted; the left stator and the right stator are respectively arranged in the end covers, which are located on two sides of the rotor; and housings for sealing are provided on outer edges of the end covers, on which the left stator and the right stator are mounted. The axial magnetic flux switch reluctance electric motor has a small axial length, a short magnetic flux path, a high energy conversion rate and a high torque density; the axial magnetic flux switch reluctance electric motor has a higher rated power for the same volume; and both the power density and the torque density are increased. Moreover, the axial magnetic flux switch reluctance electric motor has the advantages of realizing a large output, having a simple structure, being easily maintained, having a high reliability, etc., and therefore the axial magnetic flux switch reluctance electric motor has good engineering application value.
H02K 1/2796 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
H02K 3/28 - Layout of windings or of connections between windings
36.
ONLINE SOFT MEASUREMENT METHOD FOR CLEAN COAL ASH CONTENT DURING LUMP COAL SHALLOW TROUGH SORTING PROCESS
An online soft measurement method for clean coal ash content during a lump coal shallow trough sorting process, relating to the technical field of coal sorting and processing, and solving the problem that an existing clean coal ash content prediction method during a lump coal shallow trough sorting process is complex and has poor adaptability and high cost. The method comprises: collecting data in real time, the data comprising clean coal production, tail coal production, qualified medium density and a clean coal dual-energy X-ray image; inputting an R value of each pixel point in the clean coal dual-energy X-ray image collected in real time into a trained clean coal ash content prediction main model to be processed, so as to obtain a clean coal ash content prediction value; processing the clean coal production and the tail coal production which are collected in real time to obtain clean coal yield; inputting the clean coal yield and the normalized qualified medium density into a trained clean coal ash content compensation model to be processed, so as to obtain a clean coal ash content error prediction value; and compensating the clean coal ash content prediction value with the clean coal ash content error prediction value, so as to obtain a final clean coal ash content prediction result.
The present invention relates to the field of switched reluctance motors. Disclosed are a winding switching type switched reluctance motor power circuit and a control method therefor. The circuit comprises a power converter for implementing free switching of a motor between a winding series mode and a winding parallel mode, a substantially asymmetric half-bridge circuit, and a winding mode switching circuit; the asymmetric half-bridge circuit controls the normal operation of the motor, the control method uses a double closed-loop, an outer loop is a rotating speed loop, and an inner loop is a current loop or a turn-on angle loop; the winding mode switching circuit controls the mode switching of the motor; and a current sensor is used for collecting a winding phase current, a current output torque value is obtained by combining the winding phase current and a rotor position signal measured by a position sensor, a working mode of the motor is determined by means of the actual rotating speed and torque, and a suitable winding mode switching circuit control signal is obtained. A required winding connection mode can be reasonably provided, the free switching of the motor between different modes is implemented, a rotating speed range of the motor is widened, and high-efficiency operation of the switched reluctance motor in the wide rotating speed range is implemented.
Disclosed is a tunnel boring robot, comprising a frame, a movement platform (10), a supporting and stabilizing mechanism (13), a milling mechanism (1), a telescopic mechanism, an oblique feeding adjusting mechanism (2), a horizontal swinging mechanism (6), a lifting mechanism and a controller (23). The milling mechanism (1) comprises: a driving unit, a milling shaft (1-3), an eccentric rotary sleeve (1-12), a high-pressure jet nozzle unit, a tension and pressure sensor (20) and a direction sensor (19). A center line of an inner hole of the eccentric rotary sleeve deviates, such that the milling mechanism drives a milling cutter head to perform a rotary oscillation motion for rock-breaking with little resistance, and an axial and a radial exciting force are generated at the same time, thus fully utilizing the non-tensile characteristic of coal rock, and achieving a high rock-breaking efficiency. The milling cutter head is in discontinuous contact with a rock mass, such that the milling cutter head has a short contact path, is less abraded and has a low temperature, and the milling cutter head is prevented from being excessively abraded. The telescopic mechanism, the oblique feeding adjusting mechanism, the lifting mechanism and the horizontal swinging mechanism are controlled, such that the milling mechanism mills coal rock according to a predetermined path, thereby automatically and efficiently milling the rock mass. Further disclosed is an automatic cutting control method including the robot.
The present invention relates to the technical field of mineral sorting, relates to a whole size-fraction sorting pre-enrichment system and process for coal-series co-associated mineral gallium lithium, and solves the problem of low sorting efficiency of coal-series co-associated mineral gallium lithium in the prior art. The present invention comprises a feeding grading preparation unit, an X-ray efficient sorting unit, and a micro-bubble flotation unit; the X-ray efficient sorting unit and the micro-bubble flotation unit are provided on the downstream of the feeding grading preparation unit, and the feeding grading unit is used for grading strategic metal gallium lithium-rich coal series; oversize products are fed into the X-ray efficient sorting unit to be sorted, and undersize products are fed into the micro-bubble flotation unit to be sorted. According to the present invention, the coal-series co-associated mineral gallium lithium can be efficiently sorted.
The present invention relates to the technical field of switched reluctance motors, and disclosed are an axial flux switched reluctance motor having wide and narrow stator poles, and a control method therefor. The axial flux switched reluctance motor having wide and narrow stator poles has a double stator disc and single rotor disc structure, and stator teeth at two sides are opposingly installed at two sides of the rotor disc; said motor comprises a left stator, a right stator, and a rotor; the left stator and the right stator teeth are opposingly placed at two sides of the rotor, and an air gap is left in the middle; the left stator and the right stator are salient pole structures with wide poles and narrow poles in a staggered arrangement; concentrated windings are wound on wide poles of the left stator and the right stator; and winding coils in stator slots of the left stator and the right stator at a same position have opposite polarities. Due to only one phase winding coil being placed in each stator slot and the rotor utilizing a segmented rotor structure, an excitation magnetic flux forms a short magnetic flux path between a wide stator pole and an adjacent narrow stator pole, same has a short axial length, the magnetic flux path is short, same operates reliably, has a high power density, and has a wide range of rotating speeds.
H02K 29/03 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 3/46 - Fastening of windings on the stator or rotor structure
XUZHOU SHENGAN INDUSTRIAL SAFETY TESTING RESEARCH INSTITUTE CO., LTD. (China)
XUZHOU UNIVERSITY OF TECHNOLOGY (China)
Inventor
Li, Beibei
Liu, Xiumei
Wu, Su
Wei, Jianqiu
Zhao, Qiao
He, Jie
Li, Wei
Liu, Lili
Yang, Aowei
Shen, Yongxun
Liu, Mingxing
Abstract
A variable-range valve leakage detection device comprises a leakage detection pipeline (6), the leakage detection pipeline (6) comprising an expandable section (24), a variable-diameter pipeline (23), an outer wall portion and a supporting pipeline (19). The expandable section (24) comprises a flexible cloth (242) and a movable metal plate (241). The metal plate (241) is wrapped inside the flexible cloth (242) to ensure that a gas entering the variable-diameter pipeline (23) is not leaked. The variable-diameter pipeline (23) comprises an upper support (32), a lower support (33) and a movable blade (34). A round pin protrudes from the upper support (32) plate to drive the movable blade (34) to move. The lower support (33) plate is provided with a square groove to enable the movable blade (34) to rotate around the lower support (33) plate. The same detection device can detect leakages having variable leakage amounts and containing different gases. When the leaked medium has a lower flow amount and flow rate than the lower limit detectable by a measurement instrument, it is difficult for metering devices such as anemometers to detect the leaked medium. According to the present invention, the flow area is reduced to increase the flow rate, thereby measuring tiny amounts of leakages accurately.
G01M 3/28 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for valves
42.
FULL-PARTICLE FRACTION SORTING AND PRE-ENRICHMENT PROCESS FOR COAL-BASED CO-ASSOCIATED MINERAL GERMANIUM
Provided is a full-particle fraction sorting and pre-enrichment process for coal-based co-associated mineral germanium, the process comprising the steps of: S1: feeding and grading preparation; S2: X-ray sorting, which involving: feeding the oversize materials into an X-ray efficient sorting unit (2) for sorting; S3: micro-bubble flotation, which involving: feeding the undersize materials into a micro-bubble flotation unit for sorting, which involving: S3.1: passing the undersize materials through a crusher (7) and an ore grinding machine (8) in sequence to achieve sufficient dissociation; S3.2: grading the ore-ground product by means of a hydraulic grading cyclone (9), feeding the overflow product into the micro-bubble flotation and separation unit for sorting, and returning the underflow product to the ore grinding machine (8) for re-grinding; S3.3: feeding the overflow product of the hydraulic grading cyclone (9) and a reagent into a forced stirring mineralization device (12) for stirring and mineralization; S3.4: roughing the stirred and mineralized mixture by means of a flotation machine (13); and S3.5: selecting the overflow product from the flotation machine (13) by means of a flotation column (16), such that the coal-based co-associated mineral germanium can be efficiently sorted.
Disclosed in the present invention is a timing and positioning network system for a coal mine underground chain-shaped large space. On the basis of ad-hoc network base stations that are linearly deployed inside a coal mine underground chain-shaped large space, the timing and positioning network system in which the ad-hoc network base stations have a unified internal time reference is constructed by using a base station-level network internal time synchronization method that is mainly based on optical fiber timing and is supplemented by satellite timing. By means of network construction, network stabilization and network application, time references in a base station-level network are unified by using the base station-level network internal time synchronization method, thus improving the positioning precision during network application; in addition, the timing and positioning network system adapting to a coal mine underground environment is integrated on the basis of an existing underground communication ring network, which extends the network applicability.
The present application relates to an attitude self-correcting underground transportation apparatus based on UWB technology and a control method thereof. A transport clamping and fastening mechanism is mounted on an upper surface of an upper platform part of a six-degree-of-freedom motion platform. An attitude perception and sensing set at least includes three UWB tags, the UWB tags in the attitude perception and sensing set being evenly distributed on the side of the upper platform part of the six-degree-of-freedom motion platform. A control module is configured to send an electric signal to drive the six-degree-of-freedom motion platform and the transport clamping and fastening mechanism to grip an object to be transported, collect positioning information of the attitude perception and sensing set, calculate the attitude of the six-degree-of-freedom motion platform in real time, and perform attitude adjustment with reference to an expected position and attitude to maintain a smooth transportation process.
The present disclosure belongs to the technical field of mining equipment, and in particular related to an automatic driving system of a monorail hoist driven based on a digital twin and a method thereof. The system includes a railroad switch sensor module, a positioning system module, a data transferring system, an intelligent control system, a digital twin system and an automatic driving module. The railroad switch sensor module is configured to sense the connection-position state of a movable track in a monorail hoist railroad switch track. The data transferring system is configured to transmit the data on the surface and underground. A bidirectional transmission is performed between the intelligent control system and the railroad switch sensor module, a bidirectional transmission is performed between the intelligent control system and the positioning system module, and a bidirectional transmission is performed between the digital twin system and the intelligent control system.
Disclosed are a multipoint synchronous braking control system for a monorail crane, and a use method therefor. The control system comprises a touch detection unit (1), a common end roller unit (2), a hydraulic unit (3), a synchronous control unit (4) and a connecting cable (5), wherein the touch detection unit (1) is mounted on a brake shoe (7) of the monorail crane, the common end roller unit (2) is mounted on a traveling rail and is connected to a rack (8) of the monorail crane, the touch detection unit (1) comprises a cylinder (101) connected to the brake shoe (7), a metal probe (102) corresponding to the traveling rail is arranged in cylinder (101), a circular boss is formed on the metal probe (102), a limit bolt (108) corresponding to the circular boss is formed on an inner side wall of the cylinder (101), the metal probe (102) can make contact with the traveling rail or the limit bolt (8) during braking of the brake shoe (7), and the brake shoe (7) is connected to the hydraulic unit (3) by means of a brake arm (6); and the metal probe (102), the limit bolt (108), the hydraulic unit (3) and the common end roller unit (2) are electrically connected to the synchronous control unit (4) by means of the connecting cable (5). The problem that a monorail crane cannot achieve multipoint synchronous braking control can be effectively solved by detecting the idle time of each brake in real time and delaying a control command of each brake during the next braking.
A monorail crane brake shoe lost motion time detection device and a detection method thereof. The detection device comprises a contact detection unit (1), a common end roller unit (2), a lost motion time detection unit (3) and a detection line (4). The contact detection unit (1) is mounted on a brake (5) of a monorail crane; the common end roller unit (2) is mounted on a frame (8) of the monorail crane and corresponds to a driving rail (7); the contact detection unit (1) comprises a barrel (101) connected to the brake (5); a metal probe (102) corresponding to the driving rail (7) is provided in the barrel (101); a protruding cylindrical block is formed on the metal probe (102); a limiting bolt (108) corresponding to the protruding cylindrical block is formed on the inner side wall of the barrel (101); the metal probe (102) comes into contact with the driving rail (7) or the limiting bolt (108) when the brake (5) implements braking; the lost motion time detection unit (3) is electrically connected to the metal probe (102), the limiting bolt (108) and an axle (202) of the common end roller unit (2) by means of the detection line (4). The device can solve the problems of large measurement error, low adaptability and easy interference in a conventional method.
Disclosed is a single-layer shaft lining with a joint sealing structure and a grouting system and its construction method, which belongs to the technical field of mine construction engineering. A joint is formed at the contact position of an upper shaft lining and a lower shaft lining, and a sealing plate and a filling layer are arranged on the outer side of the joint; and the sealing plate and the filling layer are combined to form a sealing structure of the single-layer shaft lining. The single-layer shaft lining provided by the present disclosure has good overall water sealing performance, which is convenient to construct, and is much lower than a double-layer shaft lining and a double-layer composite shaft lining. It is suitable for the shaft excavated by freezing method, as well as suitable for the shaft excavated by common method or grouting method.
The present invention belongs to the technical field of mine construction and engineering. Disclosed are a single-layer well wall having a jointed water-stop structure and a grouting system, and a construction method therefor. Joints are formed at the contact position of an upper well wall and a lower well wall. A water-stop plate and a filling layer are arranged on the outer side of the joint, and the water-stop plate and the filling layer jointly form the water-stop structure of a single-layer well wall. The single-layer well wall provided by the invention has good overall water sealing performance, construction is convenient, the manufacturing cost is far lower than that of a double-layer well wall and a double-layer composite well wall, the single-layer well wall is suitable for a shaft dug by a freezing method, and the single-layer well wall is also suitable for a shaft dug by a common method or a grouting method.
A high-precision positioning system and positioning method for a coal-mine underground monorail crane. The system comprises two wheel carriers, which are symmetrically arranged on two sides of an I-beam track (1). A positioning wheel (4) and several traveling wheels (2) are provided on the wheel carriers, the traveling wheels (2) traveling on an upper end surface of a bottom plate of the I-beam track (1), and the positioning wheel (4) being in meshing transmission with a toothed rack (19) at a lower end of the bottom plate of the I-beam track (1). A mounting frame (18) and a connection base (9), which is used for connecting a monorail crane, are provided on the wheel carriers, and an inertial measurement unit (13) and a single-chip microcomputer (12), which are electrically connected to each other, are provided on the mounting frame (18). A rotation angle sensor (7) is provided on the positioning wheel (4), and the rotation angle sensor (7) is electrically connected to the single-chip microcomputer (12). Crane heads at two ends of the monorail crane are each provided with a coordinate updating unit (24). The high-precision positioning of the monorail crane is implemented by means of achieving the high-precision meshing between the positioning wheel (4) and the toothed rack (19) on the I-beam track (1) and then calculating the displacement of the positioning wheel (4).
B66C 13/46 - Position indicators for suspended loads or for crane elements
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
51.
ELECTROMAGNETIC PROBE TRANSMITTER SYSTEM SUITABLE FOR DEEP EARTH PROBE, AND CONTROL METHOD THEREFOR
Disclosed in the present invention are an electromagnetic probe transmitter system suitable for a deep earth probe, and a control method therefor. A power frequency rectification module in the system rectifies an alternating current, which is generated by a generator, into a direct current. A series coordination control module controls a series high-frequency DCDC module, converts the direct current obtained by means of rectification to follow a given reference value voltage, and suppresses a voltage fluctuation together with a capacitor energy storage module and a dummy load module. A cooperative transmitting module obtains GPS/Beidou timing from a timing module, and controls a switching operation of the dummy load module and a three-level transmitting module at an instruction moment. The three-level transmitting module eliminates a step time of a traditional multi-level transmitting circuit and improves a dynamic response speed, and the series coordination control module, the capacitor energy storage module, the dummy load module and the cooperative transmitting module operate collectively, such that a transient fluctuation of a transmission voltage is reduced, and the frequency of a transmission waveform is improved.
G01V 3/08 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/06 - Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
METHOD FOR DETERMINING MERCURY AND ARSENIC IN BRIQUETTES BASED ON ATOMIC FLUORESCENCE SPECTROMETRY AND DIGESTION OF BRIQUETTES USING HYDROTHERMAL SYNTHESIS REACTOR
NATIONAL COAL AND SALT CHEMICAL PRODUCT QUALITY SUPERVISION AND INSPECTION CENTER (YULIN) (YULIN PRODUCT QUALITY SUPERVISION AND INSPECTION INSTITUTE) (China)
Inventor
Chen, Juan
Wu, Jianjun
Liu, Zhe
Yan, Long
Yan, Tao
Zhang, Yixin
Guo, Zhenkun
Guo, Yang
Li, Jian
Wang, Yufei
Abstract
A method for determining mercury and arsenic in briquettes based on atomic fluorescence spectrometry and digestion of briquettes using a hydrothermal synthesis reactor, comprising: adding a certain amount of briquettes and a proper amount of mixed acid into a polytetrafluoroethylene sealed tank, which has been subjected to soaking, cleaning and preheating, for pre-digestion until a gas is released, after the reaction eases, capping, placing the polytetrafluoroethylene sealed tank into a stainless steel sleeve for sealing, placing the stainless steel sleeve into an electrothermal blast drying oven for closed heating digestion, and then performing acid removal and volume fixing operations to obtain a digestion solution to be tested; and preparing a standard series of solutions of mercury and arsenic elements, drawing a standard curve, then using an atomic fluorescence spectrometer to test the obtained digestion solution to be tested to obtain a fluorescence intensity, and performing conversion by means of the standard curve to obtain the content of corresponding elements in the briquettes.
CHANGZHOU DEVELOPMENT & MANUFACTURE CENTRE CO., LTD. (China)
Inventor
Zhu, Zhencai
Li, Huijun
He, Sikui
Gao, Yong
Ye, Bin
Qian, Jun
Wang, Baorui
Yan, Wanzi
Zhang, Yidong
Cao, Guohua
Abstract
Disclosed in the present invention is a slope and curve passage method for an unmanned rail electric locomotive in a deep limited space. The method comprises: a rail electric locomotive traveling on an underground roadway at a constant speed, collecting road data during a traveling process in real time by means of a solid-state LIDAR, and feeding the road data back to an industrial control computer, so as to obtain an original three-dimensional point cloud data packet and imu data; then, obtaining ground point cloud data and non-ground point cloud data by means of segmentation using a RANSAC algorithm; according to the collected imu data, calculating the current pose of the solid-state LIDAR, so as to feed back whether the electric locomotive travels on a slope, and then obtain the lengths and positions of an upslope and a downslope, and the electric locomotive accelerating when going upslope and decelerating when going downslope, thereby ensuring that the electric locomotive travels normally at a constant speed; and determining whether there is a curve according to the shape of a wall of the roadway, and calculating the curvature of the curve and the position of the curve. Therefore, an unmanned rail electric locomotive can accurately identify an upslope, a downslope and a curve, thereby ensuring the smooth passage of the unmanned rail electric locomotive in a mine.
A separating density forecasting method and a forecasting model construction method and device. The forecasting model construction method comprises: performing fluidization operation on dense-medium particles in a fluidized bed to achieve bubbling fluidization; suspending, by means of a dynamometer, minerals to be separated in a dry dense-medium fluidized bed, the minerals to be separated being dense ores; collecting a resultant force borne by the minerals to be separated and the bed layer density; according to the resultant force borne by the minerals to be separated and the bed layer density, the granularity and the real density of the minerals to be separated, and the bulk density of the dense-medium particles, determining a function relationship between the volume of a fluidization dead zone above the minerals to be separated in the fluidized bed and the granularity of the minerals to be separated; and constructing a dry dense-medium fluidized bed separating density forecasting model on the basis of the function relationship.
B07B 7/00 - Selective separation of solid materials carried by, or dispersed in, gas currents
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
G06F 30/20 - Design optimisation, verification or simulation
Disclosed are a grouting material for modifying mudstone, a preparation method and an application thereof, belonging to the technical field of material science and geotechnical engineering. The grouting material for modifying mudstone includes the following raw materials: cement, water, superfine micronized powder, water reducer, silane, fiber, diatomite, urea-formaldehyde resin and waterborne polyurethane. The preparation method of the grouting material for modifying mudstone includes steps of: (1) weighing the raw materials in parts by weight, mixing water of 40% of a total amount of water with water reducer, superfine micronized powder, fiber and diatomite, stirring to obtain a material A; (2) adding silane, urea-formaldehyde resin, waterborne polyurethane and residual water into the material A, obtaining a material B after continuous stirring; and (3) adding cement into the material B, and uniformly stirring to obtain the grouting material for modifying mudstone.
The present invention relates to a mine stress field twin modeling assimilation system for a full space-time mining process, and a method, and belongs to the technical field of digital twin assimilation inversion. The system comprises a digital model unit, a physical model unit and a human-computer interaction unit. The digital model unit is provided with an equal-proportion three-dimensional geological model, a mine historical assimilation model and a trusted digital twin model; the physical model unit covers a stratum and a mining face tunnel system, and the human-computer interaction unit has an information database and a software simulation monitoring interface. By means of a software establishment model, assimilation technology optimization model operation and a digital twin technology interconnection physical entity and virtual model, the present invention is able to construct a mine in-situ stress field twin model aimed at a full space-time mining process and better approximating reality, and is likewise able to use real physical scene monitoring data to perform simulated pre-mining in a virtual spatial model, aimed at grasping the space-time evolution laws of stress fields in the mining process, and providing guidance for safe mining production.
The present invention belongs to the field of mine three-dimensional digital modeling, and disclosed is a mine digital model construction method based on a three-dimensional point cloud database. Mine data resources are collected, valid coordinate point position information is extracted according to point cloud data extraction standards, and a mine three-dimensional point cloud database is established; a model of rock strata boundary surfaces, mining areas, and tunnels is constructed, a surface three-dimensional geological model is constructed, and a mine three-dimensional geological model is further constructed; and division into grids is performed to obtain a mine extraction inversion digital model. According to the method, a mine three-dimensional point cloud database can be obtained, and various identified rock strata topographies, positions of mining areas and tunnels, fault morphologies, and surface morphologies can be restored; mine extraction inversion digital models having different precisions can be constructed according to a simulation requirement by utilizing the present method, a foundation is laid for crustal stress field inversion, and a reliable basis is provided for mine disaster prevention and control.
An ellipsoidal hollow floor system-based airflow flow construction method and an airflow loss-based calculation method. The airflow flow construction method comprises: an ellipsoidal hollow floor system-based smoke exhaust construction method for performing smoke exhaust, ventilation, air conditioning, and fire extinguishing of a hollow floor system. The airflow loss-based calculation method comprises: obtaining total loss for a football-shaped cavity and obtaining total airflow loss for a disk-shaped cavity. By using the floor system composed of ellipsoidal cavities, due to curved surface characteristics of inner walls of the cavities, compared to conventional cube-shaped cavities, the floor system composed of the ellipsoidal cavities has the advantages of small overall airflow flow energy loss, a good airflow flow effect, and small sudden contraction and sudden expansion energy losses, has a better effect than the conventional cube-shaped cavities when applied to the airflow flow of the hollow floor system, has certain fire-resistant properties compared to conventional open conduits, and has more economical and efficient applications with respect to indoor smoke exhaust, indoor ventilation, air conditioning, and fire extinguishing by introducing a fire extinguishing gas such as perfluorohexanone into the floor system.
G06F 30/13 - Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
59.
Low-energy-consumption grading and positioning method for coal mine auxiliary transportation vehicle and system thereof
0 of the vehicle passing through each locked interval, and selecting whether to start overtime early warning or overtime alarm; and S60, repeating S30 to S50 after the vehicle enters the next locked interval. The low-energy-consumption grading and positioning method and system for the coal mine auxiliary transportation vehicle provided in the present disclosure realizes on-demand positioning of the underground vehicle and reduces the consumption and cost of positioning.
A method for drivable area detection and autonomous obstacle avoidance of unmanned haulage equipment in deep confined spaces is disclosed, which includes the following steps: acquiring 3D point cloud data of a roadway; computing a 2D image drivable area of the coal mine roadway; acquiring a 3D point cloud drivable area of the coal mine roadway; establishing a 2D grid map and a risk map, and performing autonomous obstacle avoidance path planning by using a particle swarm path planning method designed for deep confined roadways; and acquiring an optimal end point to be selected of a driving path by using a greedy strategy, and enabling an unmanned auxiliary haulage vehicle to drive according to the optimal end point and an optimal path. Images of a coal mine roadway are acquired actively by use of a single-camera sensor device.
G06T 5/20 - Image enhancement or restoration by the use of local operators
G06T 5/10 - Image enhancement or restoration by non-spatial domain filtering
G06V 20/58 - Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
61.
PASSIVE COMBINED INDOOR POSITIONING SYSTEM AND METHOD BASED ON INTELLIGENT TERMINAL SENSOR
The passive combined indoor positioning system and method based on an intelligent terminal sensor, and is applied to the technical field of real-time positioning, can include a data collection module, a dead reckoning module, a geomagnetic matching determining module, a single-point matching module, a sequence matching module, a single-point positioning module, a sequence positioning module, and an error correction module. The system collects sensor data of a current location by using an intelligent terminal, and performs dead reckoning and geomagnetic matching based on the sensor data of the current location, so as to obtain a fusion positioning result of the current location through particle filter.
G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
G01C 21/20 - Instruments for performing navigational calculations
62.
Series-parallel monorail hoist based on oil-electric hybrid power and controlling method thereof
A series-parallel monorail hoist based on an oil-electric hybrid power and a controlling method thereof. The monorail hoist includes a cabin, a hydraulic driving system, a lifting beam, a gear track driving and energy storage system, and a speed adaptive control system connected in series with each other and travelling on a track. The monorail hoist is capable of implementing an independent drive by an electric motor or a diesel engine in an endurance mode, a hybrid drive of the electric motor and the diesel engine in a transportation mode, and a hybrid drive of the diesel engine and a flywheel energy storage system in a climbing mode, according to different operating conditions that include conditions of an upslope, a downslope and a load. Power requirements for the monorail hoist under various operating conditions are satisfied, and the excess energy is recovered during the process of travelling.
B61C 7/00 - Other locomotives or motor railcars characterised by the type of motive power plant used; Locomotives or motor railcars with two or more different kinds or types of motive power
B61C 17/00 - LOCOMOTIVES; MOTOR RAILCARS - Details or accessories not otherwise provided for; Use of control gear and control systems
G05D 13/60 - Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover with auxiliary non-electric power using regulating devices with proportional band, derivative, and integral action, i.e. P.I.D. regulating devices
63.
INTELLIGENT FLOTATION CHEMICALS LOADING SYSTEM AND METHOD BASED ON FLOTATION TAILING ORE PULP DETECTION
An intelligent flotation chemicals loading system and method based on flotation tailing ore pulp detection, relating to the technical field of flotation chemicals loading, and for use in solving the problems in the prior art of untimely flotation chemicals loading and inaccurate dosage caused by manual adjustment. Provided is an intelligent flotation chemicals loading system based on flotation tailing ore pulp detection, comprising a flotation information collection unit, an intelligent ash content prediction unit, and a distributed control chemicals loading unit. The flotation information collection unit is used for obtaining flow, concentration, coarse particle content, and image information of ore pulp; the intelligent ash content prediction unit is used for processing the flow, concentration, coarse particle content, and image information of the ore pulp to obtain the ash content of the ore pulp; and the distributed control chemicals loading unit is used for regulating and controlling the chemicals loading amount according to the ash content of the ore pulp and the flow, concentration, and coarse particle content of the ore pulp. According to the intelligent chemicals loading system and method, flotation parameters can be continuously monitored in real time, and the chemicals loading amount can be adjusted in a timely manner.
The present application belongs to the technical field of transportations in mine tunnels, and relates to a low-power-consumption graded positioning method and system for a coal-mine auxiliary transportation vehicle. The method comprises: S10, determining an optimal transportation route for a vehicle, and dividing the optimal transportation route into a plurality of closed sections; S20, determining an initial speed v0 of the vehicle passing through each closed section; S30, establishing a discretized mileage estimation model, and updating, in real-time, the position of the vehicle, so as to obtain dynamic trajectory information of the vehicle within each closed section; S40, establishing a [v0, t] prediction model, and obtaining, by means of the prediction model, a theoretical time t0 of the vehicle passing through each closed section; S50, comparing the actual time t and theoretical time t0 of the vehicle passing through each closed section, and choosing whether to give an early-warning regarding expiration or raise an alarm regarding expiration; and S60, after the vehicle enters the next closed section, executing S30-S50 again The low-power-consumption graded positioning method and system for a coal mine auxiliary transportation vehicle in the present application realizes on-demand positioning of an underground vehicle, and reduces the power consumption and costs for positioning.
E21F 13/00 - Transport specially adapted to underground conditions
G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations
E21F 17/18 - Special adaptations of signalling or alarm devices
65.
SERIES-PARALLEL OIL-ELECTRICITY-HYBRID MONORAIL CRANE AND CONTROL METHOD
A series-parallel oil-electricity-hybrid monorail crane and a control method. The monorail crane comprises a cab (1), a hydraulic driving system, a hoisting beam (6), a toothed rail drive and an energy storage system, and an adaptive speed control system, which are sequentially connected in series and travel on a rail (7). According to different working conditions, comprising an upslope condition, a downslope condition and a loading condition, the monorail crane can realize separate driving of an electric motor or a diesel engine in an endurance mode, hybrid driving of the electric motor and the diesel engine in a transportation mode, and hybrid driving of the diesel engine and a flywheel energy storage system in a slope climbing mode, such that the power requirements of the monorail crane under each working condition are satisfied, and redundant energy is recycled during a traveling process, thereby achieving energy conservation and emission reduction.
B61C 7/00 - Other locomotives or motor railcars characterised by the type of motive power plant used; Locomotives or motor railcars with two or more different kinds or types of motive power
B61C 13/06 - Locomotives or motor railcars characterised by their application to special systems or purposes for railways with suspended flexible tracks, e.g. rope railways
B61C 17/00 - LOCOMOTIVES; MOTOR RAILCARS - Details or accessories not otherwise provided for; Use of control gear and control systems
66.
INTELLIGENT FLOTATION AGENT ADDITION SYSTEM BASED ON FLOTATION COAL TAILING SLURRY DETECTION, AND AGENT ADDITION METHOD
The present invention relates to an intelligent flotation agent addition system based on flotation coal tailing slurry detection, and an agent addition method, which relate to the technical field of flotation agent addition, and solve the problems of untimeliness and inaccurate dosing related to the manual addition of flotation agents in the prior art. The present invention provides an intelligent flotation agent addition system based on flotation coal tail slurry detection, which comprises a flotation information acquisition unit, an intelligent ash content prediction unit and a distributed controlled agent addition unit. The flotation information acquisition unit acquires the flow, concentration, coarse particle content and image information of an ore slurry, the intelligent ash content prediction unit processes the flow, concentration, coarse particle content and image information of the ore slurry, and the distributed controlled agent addition unit regulates and controls the amount of agent addition according to the ash content of the ore slurry and the flow, concentration and coarse particle content of the ore slurry. The present invention enables real-time continuous monitoring of flotation parameters and timely adjustment of the amount of agent addition.
Disclosed in the present invention is a mining camera based on mirror surface intelligent partition and water-gas-ultrasonic composite dust removal, comprising a protective housing and a camera lens arranged in the protective housing, wherein a rotatable glass lens corresponding to the camera lens is arranged on the protective housing; a movable ultrasonic cleaning module for cleaning the cleaning region of the outer surface of the glass lens, a telescopic internal dust removing module for cleaning dust on the inner surface of the glass lens, and a gas ejection module for performing air drying and dust removal on the outer surface of the cleaned glass lens are arranged in the protective housing; and the ultrasonic cleaning module, the telescopic internal dust removing module, and the gas ejection module are electrically connected to a control apparatus. Therefore, dust can be well prevented from adhering to the lens, the situation that a small amount of dust adheres to the inner surface of the glass lens of the camera due to static electricity or other influences can be avoided, the mirror surface cleaning effect can be improved, and damage to the lens is reduced.
B08B 5/02 - Cleaning by the force of jets, e.g. blowing-out cavities
B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
B08B 1/04 - Cleaning by methods involving the use of tools, brushes, or analogous members using rotary operative members
68.
LOW-ENERGY-CONSUMPTION GRADING AND POSITIONING METHOD FOR COAL MINE AUXILIARY TRANSPORTATION VEHICLE AND SYSTEM THEREOF
The present disclosure provides a low-energy-consumption grading and positioning method and system for a coal mine auxiliary transportation vehicle. The method comprises: SIO, determining an optimal transportation route of the vehicle, and dividing the optimal transportation route into a plurality of locked intervals; S20, determining an initial velocity vo of the vehicle passing through each locked interval; S30, constructing a discretization mileage estimation model to update the vehicle's real-time position, and obtaining dynamic track information of the vehicle in each locked interval; S40, constructing a [vO, t] prediction model to obtain a theoretical time to of the vehicle passing through each locked interval; S50, comparing an actual time t and the theoretical time to of the vehicle passing through each locked interval, and selecting whether to start overtime early warning or overtime alarm; and S60, repeating S30 to S50 after the vehicle enters the next locked interval.
B60W 40/00 - Estimation or calculation of driving parameters for road vehicle drive control systems not related to the control of a particular sub-unit
E21F 13/00 - Transport specially adapted to underground conditions
E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere
G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations
An accurate positioning method based on multi-source information fusion and for a monorail crane in an underground coal mine. The method comprises the following steps: calculating a dynamic location of a moving vehicle according to a vehicle-mounted label of a UWB system and a base station (S100); performing matrix transformation according to an attitude matrix contrast force which is output by a strapdown inertial navigation system, so as to calculate a traveling distance of the vehicle (S200); determining location information of a feature point according to a full-scene map constructed by a map construction system (S300); and constructing, according to a monorail crane traveling displacement model and accurate location information of the feature point, a Kalman filtering model for accurate positioning, and correcting a monorail crane real-time location model, so as to obtain accurate location information (S700). Further provided is an accurate positioning system based on multi-source information fusion and for a monorail crane in an underground coal mine. By means of performing information fusion on three positioning modes, the accuracy is guaranteed while a relatively high stability and anti-interference performance can also be achieved, and the system is applicable to the positioning of a monorail crane in an underground environment.
The present disclosure discloses a time service and positioning network systern for an undeigtound chain-shaped large space in a coal mine. The system adopts a base station- level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad- hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method.
A preparation method of nitrogen-phosphorus doped porous carbon for oxygen reduction electrocatalysis within a wide pH range, which uses natural mineral-based carbon sources as raw material and uses a sequential nitrogen and phosphorus doping process for synthesizing in two paths. The method provided may be highly cost-effective, sustainable, and suitable for large-scale utilization.
A method for screening molecular functional groups of a coal slime flotation collecting agent, relating to the field of flotation reagent design. Modified probes (14) having different flotation reagent molecular functional groups are prepared by means of deposition; then elastic deformation information generated in the process of feeding the modified probes (14) into a tested coal sample (9) is observed by means of an atomic force microscope (AFM), and probe feeding force information of the modified probes (14) in the probe feeding process is deduced according to the elastic deformation information; probe withdrawing force information corresponding to the modified probes (14) are collected to generate a probe withdrawing force curve; and probe withdrawing force curve values of all the modified probes (14) are compared, the larger the values are, the larger the adhesive force between the molecular functional groups of the flotation collecting agent on the modified probes (14) and the coal sample (9) is, and the larger the adhesive force is, the better the effect of the collecting agent deposited on the modified probes (14) is. The screening method is simple in steps, high in precision and intuitive, and the problems in the prior art that efficient collecting agent molecular functional groups are difficult to screen, a collecting agent regulation and control mechanism is not clear, etc. are solved.
Disclosed are a pulsed laser in-situ impact-assisted laser cladding apparatus and a use method. The apparatus comprises an electronic computer, the electronic computer controlling a laser cladding manufacturing module and a pulsed laser dimming module. The pulsed laser dimming module comprises a pulsed laser and a dimming frame; an optical fiber access port is provided on the outer wall of the dimming frame, the pulsed laser is connected to the optical fiber access port by means of a pulsed laser optical fiber provided, the optical fiber access port is equipped with a first reflector capable of performing reciprocating rotation, a first galvanometer and a second reflector are respectively provided on both sides of the first reflector, and a second galvanometer is provided on the other side, where the first galvanometer is located, of the second reflector. By providing the dimming frame, the technical problem that under a complex trajectory, pulsed laser cannot follow a machining action of continuous laser to constantly act on the rear of a molten pool is solved.
C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
74.
PRE-GROUTING TREATMENT METHOD FOR WATER HAZARDS IN SHAFT CONSTRUCTION
A pre-grouting treatment method for water hazards in shaft construction, the method mainly comprising the steps of: performing surveying and setting out to obtain the plane position and downhole position of a shaft; analyzing geological data of the shaft to determine a zone of a lower section of the shaft that needs a grouting treatment; constructing an annular surrounding roadway (1) in the lower section of the shaft; constructing grouting drill holes (2) upwards in the lower section of the shaft to perform a pre-grouting treatment on an aquifer; after the grouting treatment on the lower section of the shaft is completed, performing a filling treatment on the annular surrounding roadway (1); normally excavating the shaft downwards to penetrate the treated aquifer in the lower section; and finally completing the construction of the shaft. The method is suitable for operating conditions in which there has been a roadway around the bottom of a shaft, the shaft is at a great depth, and an aquifer is mainly located in a bottomhole section. By means of the method, the upper-section excavation and lower-section water hazard pre-treatment of a shaft can be performed synchronously and operated in parallel, thereby reducing the time consumed by conventional grouting-from-the surface and pre-grouting-from-the-working-face, and thus saving on the overall shaft construction time.
CHINA COAL TECHNOLOGY & ENGINEERING GROUP CHONGQING RESEARCH INSTITUTE CO., LTD. (China)
Inventor
Si, Lei
Wang, Zhongbin
Kang, Mingxia
Tan, Chao
Yan, Haifeng
Liu, Xinhua
Wei, Dong
Liang, Bin
Zou, Xiaoyu
Zhao, Lala
Gu, Jinheng
Dai, Jianbo
Wang, Qingfeng
Xin, Dezhong
Abstract
A rockburst-oriented while-drilling deviation-correcting device for an anti-burst drilling robot. A deviation-correcting structure is provided between a drill bit and an auger. A drill bit connection rod (2) passes through the center of an electric control machine (15) to be connected to the auger, the drill bit connection rod (2) being coaxial with the electric control machine (15). A plurality of oil pumps (11) are evenly arranged along the circumference of the drill bit connection rod (2), the top of each oil pump (11) being connected to a corresponding oil cylinder (6) by means of an oil feeding pipe (8) and an oil discharge pipe (10), that is, each oil pump (11) being cooperated with the corresponding oil cylinder (6) to work independently. An oil cylinder piston (5) is connected to the interior of each oil cylinder (6), an offset block (1) being fixed at an end of each oil cylinder piston (5). The offset blocks (1) are in contact with a coal wall to apply reverse displacement and counter-acting force to the auger and the drill bit, and deflection force and deflection displacement of a drilling robot during a drilling process are counteracted according to different extension and retraction quantities of the oil cylinders (6), and therefore correction of deviation and torsion of an auger mechanism can be achieved.
Disclosed is a characterization method of closed pores and connectivity of coal measure composite reservoirs, including collecting samples of coal seams and shales reservoirs, carrying out low-field NMR experiments and NMR freeze-thaw experiments on plunger samples and crushed samples with different particle sizes to obtain cumulative pore volume distribution and differential pore size distribution of the crushed samples, comparing crushed samples with plunger samples for optimal crushed particle sizes, and preliminarily determining a distribution range of closed pores; carrying out SAXS experiments on crushed samples to obtain size distribution and volume of total pores of 1-100 nanometers; calculating pore volume of total pores and closed pore volume in composite reservoirs by low-field NMR experiments results; carrying out non-steady overburden permeability experiments and variable factors on plunger samples of coal seams, shales and tight sandstone to characterize the connectivity under influence of pores development and lithologic combinations.
G01B 13/06 - Measuring arrangements characterised by the use of fluids for measuring length, width, or thickness for measuring thickness
G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
G01N 24/08 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
G01N 23/223 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
G01N 23/201 - Measuring small-angle scattering, e.g. small angle X-ray scattering [SAXS]
77.
Timing alignment method for data acquired by monitoring units of borehole-surface micro-seismic monitoring system
Xuzhou Hongyi Technology Development Co., Ltd. (China)
Inventor
Gong, Siyuan
Ge, Qing
Dou, Linming
Abstract
A timing alignment method for data acquired by monitoring units of a borehole-surface micro-seismic monitoring system includes acquiring two rock-burst waveform data segments with GPS timestamps; calculating a time difference and a number of sampling points between each pair of adjacent GPS timestamps; adding, on an equal-interval basis, a sampling time to a sampling point missing a timestamp between each pair of adjacent GPS timestamps; calculating average sampling frequencies of the two rock-burst waveform data segments, adding, on an equal-interval basis, a sampling time to a sampling point missing a timestamp except first and last GPS timestamps in each of the two data segments; obtaining sampling times of all sampling points, resampling the sampling times according to a uniform sampling frequency; calculating a rock-burst waveform data segment at a new sampling time with a linear interpolation formula, and aligning the sampling times of the two rock-burst waveform data segments.
G01V 1/28 - Processing seismic data, e.g. analysis, for interpretation, for correction
G04R 20/02 - Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
78.
MOBILE LIQUID NITROGEN FIRE EXTINGUISHING SYSTEM AND METHOD FOR UTILITY TUNNEL
A mobile liquid nitrogen fire extinguishing system for a utility tunnel is provided, including a liquid nitrogen production assembly, a fire extinguishing assembly, a monitoring device, and a liquid nitrogen conveying tubing. The mobile fire extinguishing assembly includes a liquid nitrogen storage tank and a liquid nitrogen booster pump. The liquid nitrogen storage tank is connected to the liquid nitrogen booster pump. The liquid nitrogen booster pump conveys liquid nitrogen to branch pipes in the utility tunnel through the liquid nitrogen conveying tubing. Liquid nitrogen injection ports are formed in each of the branch pipes. The liquid nitrogen production assembly is mobile and conveys the prepared liquid nitrogen to the liquid nitrogen storage tank. The monitoring device includes a first monitoring assembly and a second monitoring assembly.
A62C 3/02 - Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
CHINA ENERGY GROUP XINJIANG ENERGY COMPANY LTD (China)
Inventor
Chen, Shuzhao
Liu, Fuming
Chang, Bo
Abstract
An underground mining method for unexploited coal in a boundary open-pit mine is provided. A shaft construction platform is arranged at one rock step to two rock steps above a coal seam. Intermediate bridges are built starting from a pit bottom. Mining area clay is laid on a working slope where no intermediate bridge is built and on a side slope with an outcrop of the coal seam as a sealing layer to seal the slopes. Auxiliary vertical shafts and main inclined shafts are dug. The pit bottom is dug downward to form a digging space on a side close to the working slope between two adjacent ones of the intermediate bridges, and clay is filled into the digging space to form an artificial water barrier layer. A roadway communicating the main inclined shafts and the auxiliary vertical shafts is constructed, and a coal seam stope face is arranged.
A virtual reality high-simulation training system, comprising a simulation cabin (1). A frame plate (2) is arranged in the simulation cabin (1), and a seat (3) is fixedly installed on the frame plate (2). A motor (5) is fixedly installed on the frame plate (2), and a rotating rod (6) is fixedly installed on an output shaft of the motor (5). A first belt pulley (7) is fixedly installed on the rotating rod (6). A bearing box (15) is fixedly installed on the seat (3), a second belt pulley (8) is rotatably installed in the bearing box (15), and a same first belt (9) is transmissively installed on the first belt pulley (7) and on the second belt pulley (8). The interior of the simulation cabin (1) is provided with a fixing mechanism, a pushing mechanism, and an adjustment mechanism. The degree of comfort is improved, the immersion effect is better, training time can be lengthened for trainees, the training effect is improved, the usage is simple, and operation is convenient.
Disclosed is a relay selection method for unmanned aerial vehicles in post disaster emergency scenarios in underground space, comprising the following steps: collecting a maximum rate, a minimum rate and an average rate of data transmission assisted by a D2D user through an unmanned aerial vehicle (UAV) based on a prediction range of the D2D user for the UAV, and obtaining a first uncertain preference order of the D2D user for the UAV and a second uncertain preference order of the UAV for the D2D user; obtaining a preference strategy of the D2D user for the UAV based on the first uncertain preference order and the second uncertain preference order; and exchanging and matching the UAVs matched by any two D2D users based on the many-to-one bilateral matching model, so as to obtain a stable matching result of bilateral exchange.
A drivable area detection and autonomous obstacle avoidance method for an unmanned transportation device for deep, confined spaces comprises: acquiring three-dimensional point cloud data of a tunnel; calculating a two-dimensional image drivable area of a coal mine tunnel; acquiring a three-dimensional point cloud drivable area of the coal mine tunnel; establishing a two-dimensional grid map and a hazard map, and using an improved particle swarm path planning method designed for deep mine confined tunnels to carry out autonomous obstacle avoidance path planning; using a greedy strategy to acquire an optimal candidate end point of the driving path, and causing an unmanned auxiliary transportation vehicle to travel on the basis of the optimal end point and an optimal driving path. By means of a single camera sensor device, an image of a coal mine tunnel is actively acquired, allowing for stable, accurate and rapid calculation of a drivable area of the three-dimensional space of a deep, underground space for an auxiliary transportation vehicle, and allows for autonomous obstacle avoidance driving of an unmanned auxiliary transportation vehicle in deep mine confined tunnels on the basis of drivable area detection and safety evaluation information, which is significant for automatic driving technology for coal mine auxiliary transportation vehicles.
G06V 20/58 - Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
G06V 10/26 - Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
83.
CAPSULE SLOW-RELEASE COLLECTOR FOR COAL FLOTATION, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Disclosed in the present invention are a capsule slow-release collector for coal flotation, and a preparation method therefor and an application thereof. Components of the collector comprise a collecting agent, a functional agent, and an emulsifier; components of the collecting agent comprise diesel oil, pine oil, and an oleic acid-based ester; the functional agent is prepared by mixing a sodium silicate solution and a sulfuric acid solution in proportion; the emulsifier is a nonionic surfactant. Compared with a conventional collector, the capsule slow-release collector in the present invention has a special capsule structure and has double functions of collection and selective inhibition; when the collector capsule shell interacts with hydrophobic sites of coal molecules, the original capsule structure collapses, and the inhibitor component in the capsule core is released; when the collector does not interact with coal molecules, the inhibitor is temporarily stored in the collector. Slow release of the inhibitor avoids excessive consumption in a short time, the problem that the inhibitory effect becomes poor as the concentration of the inhibitor decreases is alleviated, the capsule slow-release collector achieves higher selectivity and has a wide application prospect.
A coal mine auxiliary transportation vehicle positioning method, relating to the technical field of vehicle transportation positioning. The method comprises the following steps: first, acquiring a rotating speed of each wheel and a steering angle of a steering wheel, respectively constructing a kinematics model based on non-turning wheels of a vehicle and a kinematics model based on turning wheels of the vehicle, and constructing a vehicle geometric center-based kinematics model according to the kinematics model based on the non-turning wheels of the vehicle and the kinematics model based on the turning wheels of the vehicle; and second, according to a travelling status of the vehicle, a, when the vehicle is in a normal travelling state, performing positioning using a combination of the vehicle geometric center-based kinematics model and a strapdown inertial navigation system (1); and b, when the vehicle is in an abnormal travelling state, performing combined positioning using the kinematics model based on the non-turning wheels of the vehicle and the strapdown inertial navigation system (1). The influence of the abnormal state on the positioning precision can be maximized, the positioning precision is improved, the compatibility is high, the precision is high, the method is simple, easy to implement, convenient, and reliable. Also provided is a coal mine auxiliary transportation vehicle positioning system.
An automatic cutting method with reduced sensors and no teaching for a shearer in an intelligent fully-mechanized mining face, comprising: initializing an automatic cutting parameter configuration data table according to three-dimensional modeling data of a coal mine coal seam of an intelligent fully-mechanized mining face; and in a process of performing automatic cutting according to the automatic cutting parameter configuration data table, automatically extracting, by means of a shearer in the fully-mechanized mining face, data such as the position, direction, speed, and cutting drum height of the shearer in a coal cutting process, and cleaning up redundant data in a process of cutting by one cut. The method implements automatic cutting technology of the shearer in the fully-mechanized mining face without teaching is achieved, and improves the intelligent running effect of drum shearers. Also provided is an automatic cutting system with reduced sensors and no teaching for a shearer in an intelligent fully-mechanized mining face.
E21C 35/00 - MINING OR QUARRYING - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or
E21C 35/24 - Remote control specially adapted for machines for slitting or completely freeing the mineral
E21C 41/16 - Methods of underground mining; Layouts therefor
A well wall pressure corrosion test system, comprising a pressure bearing device, a confining pressure application device, and a seepage water pressure application device, wherein the confining pressure application device and the seepage water pressure application device provide confining pressure and seepage water pressure for the pressure bearing device, respectively, and keep the confining pressure and the seepage water pressure constant on the pressure bearing device. An axial pressure is applied to a piston (10) by means of a hydraulic jack (9) and is then transferred to a sample (14) to complete axial pressure application. The confining pressure is applied to hydraulic oil by a manual pump (35) in combination with a first energy accumulator (40) and then transferred to the sample (14) to complete confining pressure application. The seepage water pressure is applied to a corrosion solution by a water pump group (23) in combination with a second energy accumulator (30) and then transferred to the sample (14) to complete seepage water pressure application. Therefore, the dilemma of a device for research on sample corrosion by a corrosion solution lacking multi-factor coupling in the past is alleviated, and the design of a device system for research on sample corrosion by a corrosion solution with multi-factor coupling is provided.
XUZHOU SHENGAN INDUSTRIAL SAFETY TESTING RESEARCH INSTITUTE CO., LTD. (China)
Inventor
Liu, Xiumei
Zhao, Qiao
He, Jie
Xiang, Shaobin
Li, Beibei
Li, Wei
Yi, Kunliang
Wu, Su
Chen, Jinsong
Liu, Qihang
Wei, Jianqiu
Liu, Weiwei
Zhang, Yujia
Abstract
A constant-pressure experiment based device and method for measuring a valve leakage of a pressure balance valve. The device comprises a valve to be subjected to measurement (1), a gas storage tank (2), a mass block working pipeline (9), a mass block (10), a stop valve (15) and a gas compressor (16), wherein a gas flow inlet of the valve to be subjected to measurement (1) is connected to the gas storage tank (2) by means of a gas conveying pipeline (19); the gas compressor (16) is connected to the gas storage tank (2) by means of the gas conveying pipeline (19); the other gas flow outlet of the gas storage tank (2) is connected to a gas flow inlet of the gas conveying pipeline (19) and is fixed by means of bolts; a gas flow outlet of the gas conveying pipeline (19) is connected to the mass block working pipeline (9); the mass block (10) is in gastight connection with the mass block working pipeline (9); and the mass block (10) can freely move in the mass block working pipeline (9) according to the magnitude of gas pressure in the mass block working pipeline (9). Leakages of a valve under different standard measurement pressures can be measured; the weight of the mass block (10) can be further reduced; a measurement problem occurring when there is a micro leakage in the valve is solved, thereby solving the problem of low precision of leakage measurement; and the application range is wide.
G01M 3/28 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for valves
88.
METHOD FOR POSITIONING AUXILIARY TRANSPORTATION VEHICLE IN COAL MINE AND POSITIONING SYSTEM THEREOF
A method for positioning an auxiliary transportation vehicle in a coal mine and a positioning system thereof are disclosed. The method comprises: S 1, acquiring a rotation velocity of each wheels and a rotation angel of a steering wheel, constructing a kinematics model based on the vehicle's non-steering wheels and a kinematics model based on the vehicle's steering wheels respectively, and constructing a kinematics model based on a vehicle's geometric center according to the kinematics model based on the non-steering wheels and the kinematics model based on the steering wheels; and S2, according to the vehicle's travelling condition, integrating the kinematics model based on the geometric center with a strap-down inertial navigation system for positioning, when the vehicle is in a normal travelling state; and integrating, the kinematics model based on the non-steering wheels with the strap-down inertial navigation system for positioning, when the vehicle is in an abnormal travelling state.
A mining ore tank dedusting device includes at least one dust hood, at least one pneumatic conveying pipeline and a synchronous transportation system controlled by open and close of valves. The synchronous transportation system includes an air inlet, a movable air box, a ventilation channel, ventilation openings and valves. The movable air box is configured to be an inverted U-shape and is installed at an upper surface of the at least one ventilation channel and is movable synchronously with the at least one pneumatic conveying pipeline. The ventilation openings are provided at an upper surface of the ventilation channel and connect the movable air box and the ventilation channel. The valves are provided in the ventilation openings, with distances between neighboring ventilation openings being smaller than a length of the movable air box to ensure that the movable air box always covers at least one of the ventilation openings.
B08B 15/02 - Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
E21F 5/00 - Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires
A gear-track-detachable driving device in a monorail crane for a steep slope includes a driving mechanism, a traveling mechanism, a four-bar linkage mechanism, a connection mechanism, a meshing track plate and transition track plates. The driving mechanism includes driving motors, meshing gears, a bearing rod, and a bearing plate. The traveling mechanism includes traveling wheels, clamping wheels, a shell and telescopic struts. The linkage mechanism includes first and second rockers, a linkage, and a cylinder. The connection mechanism includes fixation plates, a connection plate and connection bolts. When the crane travels to the slope front, the cylinder drives the linkage mechanism to send the meshing gears onto the transition track and adjusts the linkage mechanism into a dead point state, and the telescopic struts are locked. After the crane enters the slope, the meshing gears cooperate with the meshing track plate to provide an auxiliary drive for the crane.
A device for dust removal in mine tanks, including dust hoods, pneumatic conveying pipelines, a tape-sealed synchronous transfer system and a dust removal device. The tape-sealed synchronous transfer system includes a gas transmission port, a movable air box, a ventilating groove, ventilating openings, rubber tapes, and rollers. The movable air box is an inverted "U" shape and is movably arranged on an upper surface of the ventilating groove and is movable synchronously with the pneumatic conveying pipelines. On an upper surface of the ventilating groove are provided ventilating openings for connecting the movable air box and the ventilating groove. Distances among ventilating openings are smaller than a length of the movable air box to ensure the movable air box covers at least one of the ventilating openings at any time, and more than a ventilating opening communicates with the movable air box and the ventilating groove all times.
B08B 15/02 - Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
E21F 5/00 - Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires
Disclosed is a video personnel re-identification method based on trajectory fusion in a complex underground space; an accurate personnel trajectory prediction may be realized through the Social-GAN model; and a spatio-temporal trajectory fusion model is constructed, and personnel trajectory videos that are not affected by the occlusion are introduced into the re-identification network to solve the problem of false extraction of the apparent visual features caused by the occlusion. In addition, a trajectory fusion MARS_traj data set is constructed, and a number of time frames and space coordinate information are added to the MARS data set.
G06V 10/26 - Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
G06V 10/44 - Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
G06V 10/62 - Extraction of image or video features relating to a temporal dimension, e.g. time-based feature extraction; Pattern tracking
G06V 10/74 - Image or video pattern matching; Proximity measures in feature spaces
G06V 10/80 - Fusion, i.e. combining data from various sources at the sensor level, preprocessing level, feature extraction level or classification level
Disclosed in the present invention are a full-duplex relay-based UAV air computation system and a trajectory and power optimization method. In the UAV air computation system, a UAV is used as a full-duplex relay to perform data aggregation and forwarding. The method comprises: establishing an optimization problem with the objective of minimizing a time-averaged mean-square error of air computation, solving the optimization problem under the constraints of sensor transmitting power, an information transmission rate, a UAV trajectory, and a denoising factor, and for the overall joint optimization problem, determining optimization variables one by one by using an alternate optimization method according to high coupling of the optimization variables. According to the present invention, the mean-square error is minimized under the guarantee of a communication rate, the optimization problem is decomposed into four independent sub-optimization problems, and the trajectory and power of the UAV are optimized by using a low complexity algorithm.
Xuzhou Wushuo Information Technology Co., Ltd. (China)
Xuzhou Hongyi Technology Development Co., Ltd. (China)
Inventor
Cao, Anye
Liu, Yaoqi
Xue, Chengchun
Wang, Changbin
Yang, Xu
Wen, Yingyuan
Guo, Wenhao
Wang, Songwei
Bai, Xianxi
Lv, Guowei
Peng, Yujie
Li, Geng
Ma, Zhifeng
Xue, Jianqiu
Abstract
A rock burst hazard prediction method based on vibration wave energy attenuation characteristics of a mine earthquake cluster is provided. The rock burst hazard prediction method comprehensively considers the static load and dynamic load effects of the vibration waves of the mine earthquake cluster based on vibration wave energy attenuation characteristics of the mine earthquake cluster. The static load strength index and the dynamic load strength index involved in the method have clear physical meanings. A comprehensive prediction index calculation model proposed based on the dynamic and static load superposition principle of rock burst occurrence is clear, and the method has a firm theoretical support as well as strong universality and operability. Meanwhile, the updating and adjustment of weights are rapid and the objective judgment and prediction of the final comprehensive prediction results are efficient, and the high-energy mine earthquake and impact behavior area can be effectively predicted.
G01V 1/28 - Processing seismic data, e.g. analysis, for interpretation, for correction
95.
Fly ash-based environmentally-friendly hydrogel with high water retention for preventing and controlling spontaneous combustion of coal in mine and preparation method thereof
The present invention provides a fly ash-based environmentally-friendly hydrogel with a high water retention for preventing and controlling spontaneous combustion of coal in a mine and a preparation method thereof. The hydrogel includes the following raw materials in the following weight percentages: 10% to 30% of a gel-forming material A, 20% to 45% of a crosslinking material B, and water as a balance, where the gel-forming material A is prepared by physical blending of a biodegradable superabsorbent resin, anionic polyacrylamide, a sesbania gum, and fly ash in a weight ratio of (1-3):(0.5-1):(0.5-1):(95-98); and the crosslinking material B is prepared by subjecting zeolite, expandable graphite, and an aluminum citrate complex in a weight ratio of (60-78):(20-36):(2-4) to mixing, dispersing, adsorbing, and freeze-drying. The gel-forming material A is added to water and stirred at room temperature until homogeneous, and then the crosslinking material B is added and stirred until homogeneous to obtain the hydrogel. In the present disclosure, the environmentally-friendly hydrogel with the high water retention is prepared with wastes such as fly ash as a base material, and can be prepared simply with a low cost. In addition, the hydrogel has the advantages of degradability, strong water retention, and a controllable gelation time. The hydrogel can cover and wet a coal body for a long time, and prevent and control the spontaneous combustion of coal in a mine for a prolonged time.
An intelligent reliability evaluation and service life prediction method for a kilometer deep well hoist brake, the method including: the establishment of a digital twin model for a hoist brake, data acquisition and synchronization, and reliability evaluation and service life prediction, wherein the digital twin model for the hoist brake can accurately reflect actual physical characteristics of the hoist brake, the data acquisition and synchronization can realize real-time mapping between a physical entity of the hoist brake and the digital twin model therefor, and furthermore, on the basis of the digital twin model for the hoist brake, the reliability evaluation and service life prediction are realized. Digital twin technology is combined with a reliability analysis method, so that real-time updating of reliability evaluation and service life prediction of the hoist brake are realized.
The present invention provides a lifting appliance and method for an underground auxiliary transportation system to transfer materials. The lifting appliance comprises a lifting appliance body, guide plates mounted on two ends of the lifting appliance body by means of bolts, rotating locks mounted on four ends of the lifting appliance body, driving units for driving the rotating locks to rotate, a transmission assembly for connecting the rotating locks to the driving units, lifting pins used for preventing the rotating locks from rotating mistakenly, and sensors for controlling the lifting appliance to operate and protecting safety. The lifting appliance of the present invention can meet the ground-to-air and ground-to-ground transfer requirements of underground materials, the safety protection sensor can prevent misoperation of the lifting appliance, and the lifting appliance can adapt to standard containers of different sizes and has certain adaptability to narrow terrains, and can improve the stability of the whole mechanism in cooperation with a pull rope mechanism. Descending, unlocking, locking and ascending can be automatically achieved, thereby improving the working efficiency.
B66C 1/66 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
A powerful mixing and shearing device and method suitable for fine-particle flotation of minerals. The powerful mixing and shearing device suitable for the fine-particle flotation of minerals comprises a slurry mixing barrel. The slurry mixing barrel is provided in sequence from bottom to top with a first-section powerful mixing area (100), a second-section powerful shearing area (200), and a third-section powerful conveying area (300); mineral slurry enters the first-section powerful mixing area (100) from the bottom of the slurry mixing barrel, passes through the second-section powerful shearing area (200) and is then outputted from the third-section powerful conveying area (300).
A full-length vibration excitable component device for measuring the strength of a rock and a gel material. The device comprises a steel rod member (1), a vehicle body (2), a vibration motor (3), a frequency measurement element (4) and an integrated lead harness (5), wherein a through slot (6) is provided in the steel rod member (1), the vehicle body (2) is placed in the through slot (6), and a first mounting slot and a second mounting slot are respectively provided on the top of the vehicle body (2). By means of the device, a large number of steel rod members (1) such as reinforcing steel bars and anchor rods used in geotechnical engineering and structural engineering are taken as "signal generators", the interior of each steel rod member (1) is grooved for having a movable vibration excitation apparatus and a frequency sensing element arranged therein, and the positions of the vibration excitation apparatus and the frequency sensing element are accurately determined by using an integrated lead harness (5) with scales, thereby realizing operations of performing excitation and signal collection at any position on the full length of the metal rod member. The vibration excitation and detection elements of the device can be recycled and reused, thereby facilitating maintenance, such that the detection cost can be significantly reduced.
Disclosed is an unmanned aerial vehicle relay selection method for an underground space post-disaster emergency scenario, comprising the following steps: acquiring, on the basis of a prediction range of a D2D user for an unmanned aerial vehicle, the maximum rate, the minimum rate and the average rate of the D2D user transmitting data by means of the assistance of the unmanned aerial vehicle, so as to acquire a first uncertain preference sequence of the D2D user for the unmanned aerial vehicle and a second uncertain preference sequence of the unmanned aerial vehicle for the D2D user; acquiring, on the basis of the first uncertain preference sequence and the second uncertain preference sequence, a preference policy of the D2D user for the unmanned aerial vehicle, and after performing matching according to a multiple-to-one bilateral matching algorithm, swapping and matching any two unmanned aerial vehicles that have been matched by the D2D user, so as to acquire a stable matching result of the bilateral swapping. The algorithm of the present invention has low computational complexity, allows the same relay unmanned aerial vehicle to cooperate in the same time slot with a plurality of D2D user pairs for communication, achieves stable matching results, and can ensure that as many rescuers as possible can promptly and effectively communicate.
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