743 results about "Coal dust" patented technology

The invention discloses an efficient thin seam coaling roller for a coal mining machine and a using method, and relates to the field of coal mining equipment. A thin seam efficient coaling roller for a coal mining machine comprises a coal mining spiral roller which is fixedly installed at the power output end of a driving rocker arm of the coal mining machine through a fixing bolt; the mounting cover is fixedly mounted at the position, close to the coal mining spiral drum, of the coal mining machine driving rocker arm; while the coal mining spiral drum rotates to mine coal, water spraying at the rocker arm of the coal mining machine, water spraying at the cutting tooth seat and mist curtains sprayed by the wide-angle fan-shaped atomizing nozzles work cooperatively, the dust falling effect is enhanced, a water mist cover is rapidly formed under the assistance of the mounting cover, and the water mist cover can effectively isolate coal dust inside, so that the dust falling effect is improved. And the coal dust diffusion is greatly reduced, the body health of miners is guaranteed, the occupational health risk is reduced, the abrasion of the coal dust to equipment is reduced, the service life of the equipment is prolonged, the maintenance frequency and cost of the equipment are reduced, and the comprehensive benefits of coal mining operation are improved.

The present invention provides a method and system for detecting coal dust concentration and position information of a port coal yard, and relates to the technical field of coal dust concentration and position prediction, including: obtaining visible light images and infrared images of coal dust in a port coal yard; using APAP transformation on visible light images and infrared images to obtain spliced ​​and fused images; using network pruning and weight quantization to optimize the original YOLOv5‑tiny model to obtain a lightweight YOLOv5‑tiny model, and respectively performing bounding box coal dust target judgment and category recognition; determining the concentration weights corresponding to different coal dust data types based on particle size, particle size distribution function and humidity factors through experiments; determining the total area of ​​detection boxes of different coal dust data types according to the prediction results of coal dust bounding boxes in images, and performing weighted averaging based on the concentration weights of different coal dust data types and the total area of ​​detection boxes to obtain coal dust concentration detection results. This method can effectively improve the concentration detection accuracy of coal dust.

The invention relates to an MPRFS-based method for evaluating the efficiency of a gas-powder two-phase explosion suppressant in suppressing gas and coal dust explosion, and belongs to the technical field of coal mine underground gas and coal dust explosion protection. The method comprises the following steps: constructing a mathematical model for inhibiting gas and coal dust explosion by the gas-powder two-phase explosion suppressant; determining initial conditions, boundary conditions and input parameters of the numerical model; establishing a three-dimensional physical model of the explosion container; constructing a simulation calculation grid and a gas, coal dust and gas powder two-phase explosion suppressant distribution domain; creating a thermodynamic file and a reaction kinetics file of gas and coal dust composite explosion and explosion suppressant decomposition; developing a CFD (Computational Fluid Dynamics) numerical simulation solver and an OpenFOAM-Cantera coupling interface; solving a numerical model and correcting the model; and evaluating the explosion suppression efficiency of the gas-powder two-phase explosion suppressant. The method can effectively evaluate the inhibition effects of different gas-powder two-phase explosion suppressants in gas and coal dust explosion.

The invention discloses an intelligent monitoring system for a coal conveying trestle belt, and the system comprises a data collection module which is used for collecting the image of the coal conveying belt and measuring the thickness distribution data of coal dust on the surface of the belt in real time, and obtaining a time sequence video stream and a coal dust thickness matrix of the coal conveying belt; the dynamic reference module is used for extracting a static belt structure according to the time sequence video stream to obtain an initial reference feature map as a belt reference image without coal dust interference; the coal dust sensing and coding module is used for inhibiting high-shielding area feature response according to the coal dust thickness matrix and coding the belt image of the current frame to obtain a feature map of the current frame; the dynamic difference analysis module is used for performing difference analysis according to the current frame feature map and the belt reference image to obtain an abnormal area; according to the method, high-definition imaging of the surface of the belt and stable extraction of abnormal characteristics can be realized in a complex environment of dynamic shielding of coal dust and nonlinear attenuation of optical signals.

The invention relates to the technical field of coal mine drilling blowout prevention, in particular to a gas extraction blowout prevention device for coal mine drilling, which comprises a fixed pipe provided with a discharge port and an extraction port, and the discharge port and the extraction port are respectively communicated with external extraction equipment; the stabilizing frame is fixed at the upper end of the fixing pipe; the pressure relief seat is fixed on the fixed pipe, and a pressure relief bin with cooling liquid is formed in the pressure relief seat; the sealing bag body is fixed at one end, far away from the pressure relief seat, of the fixed pipe; the blowout prevention assembly is arranged in the fixing pipe and the pressure relief seat in a sliding mode, and a drill rod is arranged in the blowout prevention assembly in a sliding mode; when drilling work is conducted on a coal mine, coal dust and cooling liquid can be collected through the blowout prevention assembly, leakage is avoided, when gas and coal dust are sprayed out due to damage of the balance state of the coal mine, secondary buffering and pressure relief can be conducted on sprayed-out airflow, and damage of the gas and coal dust to the device is avoided.

The invention relates to the technical field of image processing, and discloses a driving working face belt conveyor coal flow monitoring device and system.The driving working face belt conveyor coal flow monitoring system comprises an intelligent coal flow monitoring and sampling module, a data processing module and a data processing module, the belt tensioning adjusting module is used for monitoring and automatically adjusting the tensioning degree of a belt, the belt deviation correcting module is used for monitoring the running direction of the belt, the coal dust cooling and dust falling control module is used for monitoring the coal dust concentration and temperature, and the data collecting and processing module is used for collecting and preliminarily processing data of all the modules. The intelligent monitoring and early warning module is used for monitoring the running state of the system in real time, and the data transmission and communication module is used for transmitting data among the modules. By means of high-precision sensors such as laser ranging, an image sensor and an automatic sampling device, errors caused by manual observation are avoided, comprehensive and automatic sampling can be carried out on coal flow, uneven sample selection caused by human factors is avoided, and representativeness and objectivity of data are ensured.

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The invention discloses a coal mine coal dust explosion risk dynamic evaluation and explosion suppression system, which comprises a sensing module, a data processing module, a data processing module and a data processing module, wherein the sensing module is used for acquiring direct and indirect parameters of an underground environment; the central processing module is used for operating a risk assessment algorithm and generating a control instruction; the explosion suppression execution modules are distributed in pipelines and roadways of underground key nodes and are used for executing explosion suppression actions; the active chemical detection module is arranged in the main ventilation pipeline and is used for carrying out pre-chemical sampling and analysis on the inflowing air so as to judge the abnormal enrichment trend of the explosive gas; according to the system, a dynamic risk assessment system based on multi-source indirect perception and active chemical detection is constructed, and precise explosion suppression of time-space cooperation is realized. The method has the advantages of being capable of achieving early warning, dynamic evaluation and precise collaborative explosion suppression.

The invention discloses a multi-stage pulverized coal separator with dynamic guide vanes. The multi-stage pulverized coal separator comprises a mounting rack; the transmission assembly is assembled on the mounting frame and is used for conveying pulverized coal; the screening assembly is assembled on the mounting frame and is used for screening pulverized coal with qualified sizes; the threaded discharging opening is fixedly connected to the side face of the mounting frame; and the circulating connecting pipe is fixedly connected to the tail end of the mounting frame. The screening efficiency of the separator is high.

The invention discloses a low-carbon energy system and method for coupling solid waste utilization of a coal-fired power plant. The system comprises a photovoltaic generator set, a wind generating set, an electric arc furnace, a biomass crusher, a biomass particle storage device, a coal-fired boiler system and the like. The method comprises the following steps of: providing electric energy for the electric arc furnace by utilizing redundant generating capacity of a photovoltaic generating set and a wind generating set; the fiber material prepared in the electric arc furnace, coal gangue and pulverized coal ash collected in the flue gas dust remover are jointly used as raw materials of the soil-like ecological restoration material, and preparation is performed in a soil-like preparation machine; energy plants which are resistant to drought and high in water and soil conservation capacity are planted under the photovoltaic generator set; the energy plants enter a biomass particle storage device to be stored after being subjected to the procedures of crushing, shaping and the like; the biomass particles are subjected to blending combustion in a coal-fired boiler system; flue gas generated after combustion of the coal-fired boiler system collects pulverized coal ash in a flue gas dust remover. The utilization rate of the coal-based solid waste is increased, and the application field of the coal-based solid waste is expanded.

The invention belongs to the technical field of coal bunker dredging, and particularly relates to a coal bunker hydraulic drilling rig dredging device which comprises a pipe barrel frame, fixing blocks, a flow dividing barrel, a slope falling type material guiding mechanism and a hydraulic drilling type material passing mechanism, the fixing blocks are arranged on the inner wall of the pipe barrel frame, the flow dividing barrel is arranged between the fixing blocks, the slope falling type material guiding mechanism is arranged on the fixing blocks, and the hydraulic drilling type material passing mechanism is arranged on the pipe barrel frame. The hydraulic drill type material passing mechanism is arranged on the slope falling type material guiding mechanism, and the slope falling type material guiding mechanism comprises a material falling assembly, a lifting assembly and a buffering assembly. According to the dredging device for the coal bunker hydraulic drilling rig, coal falling into the coal bunker can be buffered, generation of pulverized coal is reduced, and the blockage phenomenon occurring in the discharging channel can be monitored.

The invention belongs to the technical field of dust suppressants, and particularly relates to a biomass-based dust suppressant as well as a preparation method and application thereof. The biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. After the dust suppressant is sprayed on the surface layer of minerals such as coal, the dust suppression mechanism is changed according to the change of the water content, and when the water content is high, the dust suppressant can adhere to coal dust to suppress flying of the coal dust; when water volatilizes, the micro-nano biomass material or the water-soluble cellulose derivative can spontaneously assemble into a film, and the dried dust suppressant has a complete film-forming structure, certain strength, wind erosion resistance and strong affinity with coal, so that the long-time dust suppression capability of the dust suppressant can be ensured.

The invention discloses floating coal dust treatment equipment of a thermal power generation coal conveying system, and relates to the technical field of thermal power generation coal dust treatment. The floating coal dust treatment equipment for the thermal power generation coal conveying system comprises a dust collection barrel body, and a dust passing net is assembled on the top of the dust collection barrel body; and the air exhaust pipeline penetrates through the dust collection barrel main body. According to the floating coal dust treatment equipment for the thermal power generation coal conveying system, an air extracting pump is started, corresponding air extracting operation is carried out through an air extracting pipeline and a connecting cover, a fixed bin, a wind wheel, a first bevel gear, a first transmission rod, a second bevel gear, a first chain wheel, a chain, a reciprocating lead screw, a second chain wheel and a movable block are matched, and a cleaning brush plate reciprocates on an air passing net; according to the dust collection barrel, the dust collection barrel body is arranged, coal dust attached to the air passing net is cleaned into the dust collection barrel body, when the dust collection barrel is synchronously used with spraying and dust falling equipment, the coal dust with certain viscosity attached to the air passing net is cleaned, and the use efficiency of the dust collection barrel is improved.

The invention relates to the technical field of vertical shaft guide detection, in particular to an industrial intelligent visual detection and diagnosis system for a vertical shaft guide. The coal dust shadow quantization unit extracts a coal dust region by adopting a double-peak self-adaptive threshold segmentation combined region growing algorithm, and introduces a space weight factor to calculate an average gray value and a coverage area proportion, and the dynamic coupling calibration unit depends on a three-dimensional lookup table calibrated by multiple working conditions and nonlinear interpolation; the optimal deviation compensation coefficient of the jitter and coal dust combination is matched, a dynamic gray segmentation threshold value is generated, and a defect diagnosis decision unit accurately calculates the abrasion depth through partition self-adaptive segmentation, multi-scale morphological filtering and denoising and gradient amplitude and curvature double-constrained sub-pixel edge detection. A hierarchical control instruction is output according to the real-time depth and the historical trend, coupling interference is eliminated, the cage guide abrasion detection accuracy is improved, and a reliable basis is provided for safe operation and maintenance.

The present invention belongs to the technical field of coal mine dust control. It relates to a coal mining machine annular drum tracking spray dust reduction device, including an annular sprayer, an adjustable telescopic bracket, a pulley, a pulley mounting seat, a pull rope, and a support seat; the annular sprayer is arranged at one end of the adjustable telescopic bracket and is located on the outside of the coal machine drum; the other end of the adjustable telescopic bracket is rotatably connected to the support seat; the pulley is arranged on the outer shell of the coal machine drum motor, and the adjustable telescopic bracket is hoisted on the pulley through a pull rope; when the coal machine drum swings up and down, the pulley cooperates with the pull rope to drive the adjustable telescopic bracket to swing, so that the position of the annular sprayer changes dynamically with the coal machine drum. The present invention utilizes the flexibility of the pull rope and the motion relationship between the two swinging mechanisms to cleverly realize the dynamic tracking of the dust reduction device with the coal machine drum. At the same time, the sprayer is arranged in an annular manner, and the spray forms an annular water curtain, which can cover the coal machine drum in all directions to prevent coal dust from escaping.

The invention discloses a water power negative pressure dust removal device of a coal machine, and belongs to the technical field of coal mine dust removal. Comprising a fixing box, a jet flow assembly and a filtering assembly are installed on the fixing box, the filtering assembly comprises an outer pipe installed on the fixing box, a filtering cylinder is fixedly installed in the outer pipe, the filtering cylinder divides the outer pipe into an outer cavity and an inner cavity, a liquid outlet of the jet flow assembly communicates with the inner cavity, and a supporting shaft is rotationally connected to the outer pipe; an impeller and a driving assembly are installed on the supporting shaft. The jet flow assembly generates negative pressure to suck coal dust, the coal dust is mixed with jet flow water and impacts on the impeller to drive the impeller to rotate, the impeller rotates to stir mixed liquid to the filter cartridge to accelerate filtration, meanwhile, the driving assembly is driven to operate, and the driving assembly sucks filtered water in the outer cavity and sprays the filtered water out through the multiple communicated atomization nozzles. Good dust removal and dust falling effects are achieved.

The invention provides a mining terrain-adaptive rotatable dust reduction belt conveying device. The mining terrain-adaptive rotatable dust reduction belt conveying device comprises a conveying assembly, a moving assembly and a dust reduction assembly; the conveying assembly comprises a conveyor, a belt and hydraulic supporting legs. The moving assembly comprises a frame chassis and crawler-type tires, and a rotating platform is arranged above the frame chassis; the dust reduction assembly comprises a pipeline support, a dust suppressant pipeline, a dust suppressant nozzle, a pressure spraying pipeline and a pressure spraying nozzle. High trafficability and flexibility of complex terrains can be guaranteed, coal transportation can be carried out more conveniently and efficiently, the working intensity of operators is effectively relieved, and coal dust is reduced; the coal transportation route, direction, angle, transportation route and transshipment height difference can be adjusted in time; the stability of the coal in the conveying process is ensured; the generation of coal dust is inhibited; the stability and the balance of the conveyor in the rotating process are ensured; transfer coal dust can be effectively reduced in the whole operation process, and the operation efficiency of operators is improved.

The invention discloses a coal mining equipment gear box oil liquid multi-parameter real-time online intelligent monitoring system, and relates to the technical field of coal mining equipment intelligent monitoring, and the system comprises a multi-parameter sensing unit which is mechanically connected to the interior of a gear box oil way; the edge calculation unit is electrically connected with the multi-parameter sensing unit through a signal cable; and the mining intrinsic safety type communication module is fixedly mounted at the output end of the edge computing unit. According to the coal mine equipment gearbox oil liquid multi-parameter real-time online intelligent monitoring system, through the collaborative design of the integrated probe and the three-dimensional compensation sealing ring, the problem of sensor failure caused by high dust invasion and strong vibration in a coal mine is solved, and it is ensured that multiple types of sensors stably operate for a long time in a gearbox oil way with the limited space; the molecular-level optimized functional coating is combined with a negative-pressure inert gas environment to form a double barrier for oil stains and pulverized coal, so that low-pollution detection of the sensitive element is realized.

The invention belongs to the technical field of unattended management of thermal power plants, and relates to an intelligent dust fall and combustion suppression unattended management and control method and system for a coal yard of a thermal power plant. The method comprises the following steps: acquiring coal dust concentration, a dust region, a plurality of coal pile weights and a plurality of coal pile position forms; obtaining the spraying amount according to the coal dust concentration, and obtaining the spraying area range according to the dust area. The coal pile temperature is obtained in real time, whether combustion suppression control needs to be carried out or not is judged according to the coal pile temperature, if yes, the component of combustion suppression medicine is obtained according to the weight of the multiple coal piles, the medicine concentration is obtained according to the component of the combustion suppression medicine and the coal pile temperature, and the spraying angle of the medicine spraying equipment is obtained according to the position forms of the multiple coal piles. The manual labor intensity and the occupational disease hazard probability are remarkably reduced through automatic spraying operation; and real-time temperature monitoring and precise spraying cooling are combined, so that spontaneous combustion of the coal pile is effectively prevented. According to the invention, intelligent safety control of the coal yard is realized, and the stability and reliability of safe operation of the coal yard are improved.

The invention belongs to the field of coal mine dust falling, and particularly relates to a composite coal dust suppressant spraying system and application thereof. The composite coal dust suppressant spraying system comprises a spraying unit and a dust suppressant solution, the spraying unit comprises a water storage tank, a high-pressure water pump and a wide-angle solid nozzle, the dust suppressant solution at least comprises alkylphenol polyoxyethylene ether and xanthan gum, and the dust suppressant solution is provided with a three-dimensional network structure used for filling coal dust particle gaps. By changing a spraying medium and adding materials into water, the characteristics of wetting, bonding, agglomeration and the like are improved, the composite dust suppressant with an energy-shaped three-dimensional network structure is developed, and a composite dust suppressant spraying system with the wettability, the water retention and the wind erosion resistance cooperatively improved is provided, so that the spraying and dust falling efficiency of a coal mine is improved, and the dust suppression effect is improved. And the problem of reentrainment of dust is solved.

The invention belongs to the technical field of coal mine safety research, and discloses a fuel-rich gas coal dust explosion residual gas secondary explosion test device which comprises a primary explosion container and a secondary explosion container, the primary explosion container is communicated with the secondary explosion container through a three-phase valve, and the three-phase valve is communicated with a gas sample bag; the pulverized coal spreading system comprises a first spreading machine and a second spreading machine which are fixedly arranged at the bottoms of the primary explosion container and the secondary explosion container in a penetrating manner respectively; the gas supply system comprises a premixing tank which is communicated with the primary explosion container and the secondary explosion container; and the image acquisition system comprises a first camera and a first infrared thermal imager which are arranged corresponding to the first explosion container, and a second camera and a second infrared thermal imager which are arranged corresponding to the secondary explosion container. According to the invention, the research on the flame propagation dynamic characteristic evolution mechanism under the influence of multiple parameters of fuel-rich gas coal dust explosion and residual gas explosion is realized, the experimental error is reduced, and the research cost is reduced.

The invention relates to the technical field of computer vision and industrial equipment fault diagnosis, in particular to a fault image diagnosis system for a remote controller of a bolter miner driven by a CMC chip. Comprising a data sensing module for synchronously acquiring a CMC chip internal logic state vector and a real-time observation image, and preprocessing to obtain target visual data; the generative reconstruction module maps the logic state vector to a high-dimensional space to generate an ideal feature map; the visual analysis module is used for extracting an observation feature map through a convolutional neural network, generating an interference distribution mask based on frequency domain texture statistics, and identifying an unstructured environmental noise region; the difference analysis module is used for calculating a semantic residual image by combining the ideal feature map, the observation feature map and the interference distribution mask, and generating an image difference analysis result; according to the method, ideal features are generated by using the internal logic state vector of the CMC, and the residual calculation of the coal dust noise area is shielded by the interference mask, so that the false alarm caused by the environmental noise is effectively eliminated, and the closed-loop verification that what you see is what you control is realized.

The utility model provides a coal dust spraying and dust falling device for coal mining, which comprises supports fixedly arranged on two sides of a rack at the output end of a conveying belt, a transverse plate is fixedly arranged between the top ends of the two supports, a spraying pipe is erected below the transverse plate, and spraying heads are uniformly arranged at the bottom of the spraying pipe; the spraying pipe is connected with a water supply assembly through a pipeline, the water supply assembly is electrically connected with a controller, and the controller is used for controlling the water supply assembly to supply water to the spraying pipe or stop supplying water to the spraying pipe. The controller is electrically connected with a relay for controlling the start and stop of the conveying belt and is used for collecting power-on and power-off signals of the conveying belt; according to the utility model, the water supply assembly and the conveying belt are in linkage control, spraying dust fall is carried out when the conveying belt runs, spraying dust fall is stopped after the conveying belt stops and delays for a period of time, the spraying dust fall is not influenced by the height of coal gangue flow on the conveying belt, and the dust fall effect is ensured.

The utility model belongs to the technical field of dust removal devices, and particularly relates to a dust removal system with a standby dust removal fan device, which is characterized in that a standby dust removal fan is further arranged in the dust removal system; the air inlet end of the standby dust removal fan is connected with a third three-way pipe through a pipeline, one end of the third three-way pipe is communicated with the first three-way pipe through a first branch pipe, the other end of the third three-way pipe is communicated with the second three-way pipe through a second branch pipe, and a first butterfly valve and a second butterfly valve are installed on the first branch pipe. A first connecting piece is arranged between the first butterfly valve and the second butterfly valve; a third butterfly valve and a fourth butterfly valve are installed on the second branch pipe, a second connecting piece is installed between the third butterfly valve and the fourth butterfly valve, and one of the first connecting piece and the second connecting piece is connected and the other one is disconnected according to process requirements. The standby dust removal fan has the advantages that the standby dust removal fan can be quickly connected into a coke dust removal system or a coal dust removal system, so that the dust removal system is ensured to stably operate and meets the requirements of relevant specifications.

The invention provides a supersonic rotational flow atomization dust removal spray head device and a spray pipe optimization simulation analysis method, and relates to the technical field of supersonic rotational flow atomization spray heads, the device comprises an air inlet pipe, a liquid inlet, a shell, a Laval spray pipe, an outer rotational flow pipeline and an atomization spray nozzle, the Laval spray pipe is arranged in the outer rotational flow pipeline, and the atomization spray nozzle is arranged in the shell; a wave elimination section of the Laval nozzle is connected with the atomizing nozzle, a spirally distributed liquid film circular seam is formed in the side wall of a mixing chamber at the lower end of a throat part of the Laval nozzle, and a spiral flow deflector is arranged at an outlet of the atomizing nozzle. Efficient dynamic interaction with rotating liquid supplied by the outer ring spiral channel occurs at the outlet of the nozzle, efficient fog drop crushing and uniform spraying are achieved through airflow acceleration and kinetic energy conversion, and it is guaranteed that the particle size of fog drops meets the requirements of capturing coal dust, improving the atomization efficiency, strengthening the wind resistance and reducing water consumption; better fogdrop particle size matching is realized; and the blocking risk is reduced.

The utility model relates to the field of coal mine dust removal equipment, in particular to a pneumatic wet dust remover. The wet-type dust removal device comprises a dust removal cylinder with two open ends and a wet-type dust removal assembly located in the dust removal cylinder. The wet-type dust removal assembly is provided with a spray head and fan blades, the fan blades are driven to rotate to generate air flow by taking inlet and outlet air as power, and meanwhile, the air flow is linked with water drops sprayed by the spray head to wet and collect dust. The wet-type dust removal assembly is arranged, kinetic energy is provided through the pneumatic motor, and the fan blades are driven to rotate. The fan blades rotate to generate a negative pressure environment, and dust is sucked into the dust removal cylinder. And meanwhile, the underground water filtered by the filter is sprayed out after being atomized by the spray head to humidify the sucked dust. Through wind-water linkage, the contact volume of wind and water and coal dust is increased, and the dust falling efficiency is improved.

The utility model relates to a staged feeding device capable of preventing coal dust from bonding. The device comprises a material frame, a lump coal hopper, a pulverized coal hopper, a first sieve plate and an adjusting mechanism, the bottom of the material frame is fixedly connected with the lump coal hopper used for collecting lump coal and the pulverized coal hopper used for collecting pulverized coal, the first sieve plate corresponding to the pulverized coal hopper is obliquely installed in the material frame, first sieve holes are formed in the first sieve plate and are in a long strip shape, and the adjusting mechanism is arranged on the first sieve plate. Lump coal can roll to the lump coal hopper along the first sieve plate, and pulverized coal penetrates through the first sieve holes to fall into the pulverized coal hopper; an adjusting mechanism is further installed in the material frame, and the screening size of the first screening plate can be adjusted through the adjusting mechanism. According to the scheme provided by the invention, the pulverized coal or the pea coal can be screened out before the coal mine enters the silo and treated independently, so that the situation that a large amount of the pulverized coal or the pea coal is bonded in the silo is avoided.

The following pneumatic wet-type vibrating wire dust remover comprises an air inlet barrel, a fan barrel and an air outlet barrel which are sequentially connected and coaxially arranged, an air inlet grille is fixed to the outer side of the air inlet end of the air inlet barrel, a negative pressure spraying device is arranged in the air inlet barrel in a sleeved mode, a water inlet is formed in the outer surface of the air inlet barrel, and the negative pressure spraying device is communicated with the water inlet; a vibrating wire dust removal plate is arranged in the air inlet barrel, and a pneumatic fan is coaxially arranged in the fan barrel. When in use, the device is respectively arranged at the left and right walking parts of the coal mining machine body to realize nearby dust removal, effectively reduce coal dust dissipation and achieve high dust removal efficiency. The device adopts negative-pressure spraying, the vibrating wire dust removal plate is matched with the fan to realize dust removal, the dust removal efficiency is high, and the effect is good. An air outlet of the device is matched with a silencer, and noise of the fan is effectively reduced. And the sewage is discharged to the toothed rail of the scraper conveyer through a special pipeline, so that the cleaning and lubricating effects are achieved, coal powder and dirt are treated without shutdown, the operation efficiency is further improved, and the operation environment is remarkably improved.

The application discloses a kind of based on ultra-wideband radar's on the scraper conveyor up and down slide monitoring device and method, belong to coal mine safety state monitoring technical field.The monitoring device includes the electric rotating platform installed on the head of scraper conveyor, linear array antenna pointing to the end face end coal wall is installed on the electric rotating platform, linear array antenna connects ultra-wideband imaging radar signal module;Industrial computer sends instruction to control the receiving and sending of ultra-wideband imaging radar signal module, the rotating movement of electric rotating platform respectively;Linear array antenna installed on the head of scraper conveyor is driven by electric rotating platform, periodically collects the radar image of end face end, then by registration with the image periodically collected before, to deduce the distance that the head of scraper conveyor up and down slide;It has strong robustness to the harsh environmental conditions of end face end coal dust water vapor, and monitoring data is accurate.

The invention relates to the technical field of gas well reservoir identification methods, in particular to a method and device for eliminating coal seam interference in gas well reservoir accurate identification, and the method comprises the following steps: determining the existence of a coal seam by using a while-drilling gamma curve, a resistivity curve and a rock debris logging coal dust proportion; calculating a dynamic influence factor; on the basis of a gas survey data correction formula, obtaining a gas survey correction value of any depth point, and on the basis of a resistivity correction formula, obtaining correction resistivity; and determining the reservoir type by combining the gas logging correction value, the correction resistivity, the gas logging humidity ratio and the interval transit time. According to the method, firstly, the gas logging data and the logging resistivity are corrected, the influence of the coal seam on the gas logging data and the resistivity data is eliminated, the abnormal interference of the coal seam on the gas logging data and the logging data is effectively removed, and then the gas logging correction value obtained after correction, the correction resistivity, the gas logging humidity ratio and the interval transit time are combined, so that the gas logging data and the logging resistivity are obtained. According to the method, the precision and the efficiency of gas reservoir identification are improved.