45 results about "Longwall mining" patented technology

The disclosure provides an upward horizontal layer filling mining method with support column roof protection, and relates to the technical field of mining engineering, and the method comprises the following steps: a plurality of layers are divided in a mine chamber; the layers are evenly divided into a plurality of stope fields perpendicular to the ore body trend along the ore body trend; the ore bodies of the plurality of stope fields are sequentially mined; a plurality of support columns for supporting the roof of the ore body are vertically arranged in the stope field which has been mined out; after all the stope fields in the layer are mined, one-time filling is performed; the above steps are repeated until all the ore bodies in the mine chamber are mined. The upward horizontal layer filling mining method with support column roof protection can improve the ore recovery rate, the safety of the mine chamber and the mining efficiency, realizes the effective balance of safety, economy and high efficiency, and has a wide application prospect.

This invention discloses a method for coordinated unloading-support-filling roadway protection in a longwall mining face of a steeply inclined coal seam. The method includes: arranging pre-reinforcing anchor bolts and cables at certain intervals in the transport roadway to reinforce the transport roadway in advance; pre-excavating a gap in the upper side of the transport roadway by blasting, and adding reinforcing anchor bolts and cables to the cross-section of the pre-excavated gap; arranging pressure-relief boreholes at certain intervals in the center of the coal seam roof at the pre-excavated gap, and implementing pressure-relief blasting after the support is moved; using I-beams and retractable modular roadway protection supports as the first and second layers of rock-blocking support, respectively; filling and sealing the goaf area above and on the sides of the retractable modular roadway protection supports with local filling materials; and arranging single hydraulic props for delayed support at a certain distance from the coal wall of the lagging face inside the roadway along the goaf. This method provides good support, significantly increases the speed of roadway retention in a longwall mining face of a steeply inclined coal seam, and effectively ensures safe and normal production.

The present invention relates to the technical field of coal seam gas drainage, and specifically relates to a method for regional coal seam gas drainage in a monoclinic structure, which includes: designing the working face of the coal seam by adopting the longwall mining method along the strike in view of the monoclinic structure background; constructing inclined drainage directional boreholes at the working face in the high part of the mine structure; designing and constructing large-diameter drainage directional boreholes at the low part of the mine structure according to the borehole construction data, and installing a gate valve at the orifice of the boreholes to control the drainage intensity. After the construction of the large-diameter drainage directional boreholes is completed, hydraulic fracturing is carried out, and the fractures formed by the hydraulic fracturing communicate with the drainage directional boreholes, effectively discharging the accumulated water in the drainage directional boreholes; after the accumulated water is discharged, the orifice gate valve is closed, and drainage is regularly carried out during the gas drainage process. The present invention can achieve regional drainage of coal seam gas in a monoclinic structure background, and can carry out gas drainage across several sections or even the scope of one level at a time, solving the technical problem that it is difficult to achieve regional drainage in the prior art.

This invention relates to the field of rockburst hazard assessment technology for underground coal mine working faces, specifically a method for assessing rockburst hazard in longwall mining faces, comprising: (1) determining the assessment object, including its geological and mining technical conditions and scope; (2) conducting factor analysis based on factors affecting rockburst hazard; (3) assigning values ​​to all influencing factors according to a factor value table; (4) calculating the assessment indicators; and (5) comparing the calculated values ​​of the assessment indicators with the critical indicators to determine the rockburst hazard level of the working face. This invention solves the problems of existing assessment methods failing to accurately identify the overall rockburst hazard level of the working face and failing to comprehensively analyze geological and mining technical conditions, resulting in errors in the rockburst hazard level assessment. It can assess the overall rockburst hazard level during longwall mining, improving the accuracy of the macroscopic assessment results of rockburst hazard level and providing a basis for rockburst prevention and control during longwall mining.

The invention relates to a shearer loader for longwall mining, having a machine body (1) which is movable along a face conveyor (7) in the longitudinal direction (S) of the longwall by means of a drive device and having at least two drum arms (4) which are pivotally attached to the machine body (1) and at the free ends of each of which a cutting drum (5) is rotatably mounted, the machine body (1) having a support structure which is formed by a bracing of at least two support elements (3) in the longitudinal direction (S) of the longwall, and the machine body (1) comprising functional units (2). The aim of the invention is to further develop the shearer loader in such a way that the structural design of the machine body (1) allows larger dimensions of the shearer loader in order to work face thicknesses of 10 m and more. According to the invention, this is achieved in that the support elements (3) are designed as frame elements (8), each of which has an installation space (9) for the functional units (2).

The invention relates to the technical field of coal mining, in particular to an ultra-thick coal seam fully mechanized caving face mine pressure regulation and control optimization method. The method is used for solving the problems that in the mine pressure detection process, response to mine pressure fluctuation emergencies is slow, multi-dimensional data cannot be effectively combined for comprehensive analysis, and manual judgment errors are caused by excessive manual intervention. By monitoring the mine pressure of the fully mechanized caving face of the coal seam, displacement of a supporting structure and soil settlement data in real time and combining a Kalman filter and a neural network deep learning algorithm, the stability of a mine pressure system is accurately analyzed, the change trend of the mine pressure is predicted, early warning is conducted in advance, mine pressure regulation measures are optimized, and coal mine operation safety is ensured; a convolutional neural network and a recurrent neural network are adopted to process time domain and frequency domain feature data, automatic signal matching and control decision are achieved, the operation modes of a supporting structure and mechanical equipment are dynamically adjusted, the human decision complexity is reduced, and mine safety is ensured.

This invention discloses a method for intelligent roof control and diversion to prevent sudden and abnormal gas outbursts in goaf areas. This method involves determining the initial and cyclical pressure step distance, optimizing the design and construction of roof control and diversion borehole parameters, introducing a controllable, slow-release static fracturing agent into key strata, installing stainless steel screens and sealing and continuously pumping out the gas, intelligently controlling the coupling of roof fracturing and diversion / extraction parameters, evaluating and optimizing the effects, and cyclically executing the method as the working face advances. This forms a collaborative prevention and control system of "active weakening - intelligent control." This invention shifts the disaster management operation space from the longwall mining face to the floor drainage roadway, and the roof weakening method shifts from traditional blasting to a safe, environmentally friendly, and controllable static fracturing agent pre-fracture method. The management approach shifts from single-hazard management to multi-hazard collaborative management, achieving intelligent roof control and diversion to prevent sudden and abnormal gas outbursts in goaf areas. This fundamentally eliminates the adverse effects of strong mine pressure manifestations and abnormal gas outbursts in goaf areas on safe production, curbing risks at the source.

The invention discloses a fully mechanized caving face scraper conveyor with a crushing device, and belongs to the technical field of coal briquette crushing, the fully mechanized caving face scraper conveyor comprises a scraper conveyor, and further comprises a plate B, a plate A and a connecting plate, the plate B is obliquely and fixedly connected to the scraper conveyor, the plate A is obliquely arranged above the plate B, a certain distance is formed between the plate A and the plate B, and the connecting plate is fixedly connected to the plate B; a plurality of groups of insertion pipes A and insertion pipes B are arranged on the plate A, every two adjacent insertion pipes A and insertion pipes B are in butt joint to form a cone, the insertion pipes A and the insertion pipes B are fixedly connected to the connecting plates respectively, the connecting plates are slidably connected to the plate A, and driving assemblies used for driving the insertion pipes A and the insertion pipes B to slide oppositely are arranged on the connecting plates; the screening assembly is used for enabling the crushed coal briquettes to fall onto the scraper conveyor; the pressurizing assembly is used for driving the plate A to move towards the plate B in a reciprocating manner; the coal briquette crushing device can effectively and uniformly crush coal briquettes.

This invention discloses a method for determining the grouting layer and timing of artificially consolidated bodies, comprising: obtaining the theoretically calculated grouting layer of the artificially consolidated body based on shallow-buried fully mechanized longwall mining parameters; obtaining the grouting layer and earliest grouting timing of the artificially consolidated body using measured overburden movement data; determining the latest grouting timing of the artificially consolidated body using measured surface subsidence data; establishing an evolution model of the artificially consolidated body controlling the porosity of the mining space using computer numerical simulation, and determining the optimal theoretical grouting timing and theoretical grouting timing range for the artificially consolidated body with the largest porosity; finally, verifying and adjusting the grouting timing based on measured grouting volume of key rock strata, grouting timing, and porosity below the artificially consolidated body to obtain the final grouting timing range for the artificially consolidated body. This method achieves precise control of the mining space in shallow-buried fully mechanized longwall mining by accurately and reasonably determining the grouting layer and grouting timing of the artificially consolidated body.

This invention provides a method for detecting the position of a coal mining machine in a fully mechanized longwall mining face based on UWB, belonging to the field of coal mining machine position detection technology. It solves the problem of inaccurate coal mining machine position detection currently available, which is easily affected by environmental factors. A UWB coal mining machine ranging sensor is installed on the coal mining machine body, with two antennas mounted on the sensor. A UWB ranging base station is installed on the electro-hydraulic controller of every X hydraulic supports. The method includes the following steps: the UWB coal mining machine ranging sensor broadcasts a call to the UWB ranging base station; the UWB coal mining machine ranging sensor records the base station number n that responds to the UWB ranging base station; the UWB coal mining machine ranging sensor measures at least 5 sets of ranging information with the UWB ranging base station n as the center; the UWB coal mining machine ranging sensor filters all valid data from the measured data, selecting the set with the smallest distance value and sending it to the corresponding support controller; the support controller calculates the coal mining machine position based on the received data. This invention is applied to coal mining machine position detection.

The utility model relates to dust removal technical field, concretely relates to a coal mine fully mechanized caving and continuous mining dust falling device, including support pipe, the upper end of support pipe is equipped with the open -ended downward air outlet, the lower extreme is equipped with the air inlet, the plugging disc and filter cartridge are equipped with cleaning mechanism between, the multiple of cleaning mechanism are evenly arranged at intervals, cleaning mechanism includes outer partition, inner partition, outer partition is equipped with cleaning groove, the inside of cleaning groove is equipped with sweep ash subassembly, inner partition is equipped with auxiliary groove, auxiliary groove and cleaning groove enclose the closed cleaning cavity, multiple cleaning mechanism divide filter cartridge into the filter area and cleaning area of alternately arranged, the process of power mechanism drive plugging disc drive cleaning mechanism rotation, the filter area of filter cartridge carries out filtration, sweep ash subassembly carries out cleaning to the cleaning area of filter cartridge, realizes the synchronous of filter cartridge's filtration and cleaning, simultaneously, along with the rotation of plugging disc, the filter area and cleaning area of filter cartridge are alternately converted, make filter cartridge keep higher filtration efficiency all the time, has improved dust removal efficiency.

This invention provides a roof fall and rib collapse protection device and method for fully mechanized longwall mining faces with high mining height. The protection device includes a connecting seat, a hydraulic jack, a forward probe beam, and a cutting section. The connecting seat is fixedly installed on the top beam of the hydraulic support. The rear end of the hydraulic jack is fixedly connected to the connecting seat. The forward probe beam is fixedly connected to the front end of the hydraulic jack. The cutting section is located at the front end of the forward probe beam. The protection method includes determining the size parameters of the pressure relief groove; cutting the coal wall of the working face ahead of the cutting section to form the pressure relief groove; extending the forward probe beam into the pressure relief groove to provide full-time support for the roof; cutting coal 3-5m behind the pressure relief groove; and moving the support frame and scraper conveyor about 5m behind the coal mining machine. The protection device is moved forward as a whole, and the pressure relief groove is deepened by the cutting section. The forward probe beam is extended to support the roof. The above steps are repeated to complete coal cutting, support moving, and scraper conveyor pushing. This solves the problem of intermittent passive protection against coal wall rib collapse and roof fall in fully mechanized longwall mining faces with high mining height in the prior art.

This invention discloses a method for leaving a roadway in a steeply inclined thick coal seam longwall mining face with a single roadway, relating to the field of coal mine steeply inclined thick coal seam mining technology. The method includes: excavating the roadway cross-section along the floor of the steeply inclined thick coal seam, excavating along the coal seam strike, and penetrating the return air incline and transport incline. The roadway is supported by transverse and longitudinal I-beams and equipped with individual hydraulic props. Coal resources adjacent to the roadway are mined; after the coal resources are mined, hydraulic supports for top coal caving are deployed for top coal caving mining. After the top coal caving is completed, the coal resources in front of the supports are mined, and the supports are moved forward to cave the top coal, repeating the mining-moving-caving cycle. After the working face advances, the roadway behind the working face is densely maintained with individual hydraulic props. Simultaneously, yellow mud slurry is injected into the floor of the goaf behind the working face. This invention only requires excavating one roadway, ensuring good ventilation at the working face and preventing spontaneous combustion of residual coal in the goaf.

This application relates to the technical field of coal release at the end of a conveyor belt roadway in a fully mechanized longwall mining face in thick coal seams, and in particular to a coal release device for an end-face frame. The device includes two symmetrically distributed top beams and a base located below the top beams. Front beams and shield beams are respectively installed on the front and rear sides of the top beams. The top beams and the base are connected by a retractable column support. This invention reduces the area of ​​the rear corner roof overhang by adding a high-level coal release device to the end-face frame and implementing coal release operations, allowing the roof to collapse in a timely manner and avoiding dynamic disasters such as rockbursts caused by sudden collapse of a large area of ​​overhanging roof. This invention also reduces residual coal in the goaf by implementing coal release at the end of the conveyor belt roadway, lowering the risk of spontaneous combustion of residual coal. Furthermore, this invention improves the working face recovery rate, reduces resource waste, and increases economic efficiency by implementing coal release at the end of the conveyor belt roadway.

The invention provides a coal gangue vibration signal intelligent identification method based on double-branch Mama and comparative learning, and the method comprises the steps: collecting a coal gangue impact vibration signal at a tail beam of a hydraulic support, and converting the coal gangue impact vibration signal into a time-frequency spectrogram; global features of the signals are extracted through a double attention feature extraction model, and decoupling of different branch features is achieved through JS divergence loss; inputting the decoupled features into a double-Mamba modeling model, extracting fine-grained local sequence features, and combining a supervised NT-Xent contrast loss function to constrain the compactness of similar features and the separability of heterogeneous features; and fusing the features through a classifier module containing residual convolution and a multi-layer perceptron, and outputting a coal or gangue recognition result. According to the method, the problem that an existing method neglects intra-class similarity and inter-class heterogeneity is solved, feature decoupling and accurate classification can be achieved without complex external data enhancement, and the method has extremely high recognition precision and robustness in a complex underground high-noise environment and is suitable for intelligent control over the fully mechanized caving face.

This disclosure proposes an intelligent recognition method and device for video images from fully mechanized mining faces, relating to the field of coal mine safety image recognition technology. The method includes: acquiring video monitoring images of the fully mechanized mining face, including images acquired by an image acquisition device mounted on a hydraulic support; identifying the fully mechanized mining face based on the video monitoring images to obtain successfully identified target objects and assigning them numbers; acquiring feature data of the target objects and updating their status information based on the feature data; and generating a display image based on the updated status information, the target object's number, the video monitoring images, and the physical number of the hydraulic support. Thus, by acquiring video monitoring images, identifying target objects, and obtaining their feature data, the status information of target objects can be accurately monitored and updated in real time, increasing the efficiency and accuracy of video monitoring recognition.

According to the in-situ monitoring device and method for the vertical displacement of the bottom plate of the downward mining filling body, a laser range finder, a monitoring barrel and a data processor are all located outside a goaf to be filled, the size of each device does not need to be considered during monitoring, and the devices are not affected during filling; the monitoring barrel and the elastic hose are combined, a part of a pipe body of the elastic hose is arranged in a bottom plate of a goaf to be filled, and pressure transmitters are arranged at different depth positions of the part of the pipe body respectively; before filling, the relative position between each pressure transmitter and a reference plane is obtained by collecting data; then filling work is carried out until the end, and data are collected again to obtain the relative position between each pressure transmitter and the reference plane; and the vertical displacement change of each pressure transmitter before and after filling can be obtained by calculating the difference between the relative positions of the pressure transmitters before and after filling, so that the vertical displacement change condition of a filling body bottom plate in the downward mining process can be accurately obtained.

This invention discloses a method and apparatus for coordinating coal and gangue roughing and backfilling of the goaf in a fully mechanized longwall mining face, belonging to the field of green coal mining and underground solid backfilling technology. This invention aims to solve the technical problems in existing fully mechanized longwall mining faces, such as high cost of gangue removal from the surface, significant water waste, limited underground disposal capacity, and delayed goaf backfilling. The method of this invention includes: longwall mining and raw coal transportation, underground coal and gangue roughing, reverse gangue transfer, and dry gangue backfilling in the goaf. The apparatus of this invention includes a coal mining device, a transportation device, a sorting device, a transfer device, and a backfilling device, which work in coordination through an optimized arrangement of scraper conveyors, belt conveyors, gangue removal supports, and a high-speed gangue thrower. This invention realizes an integrated closed-loop process of "coal mining-roughing-backfilling", which allows gangue to be backfilled as it is mined without having to be brought to the surface. This significantly improves the efficiency of gangue disposal, reduces mining costs and water consumption, effectively controls roof collapse, and ensures operational safety. It is an important innovation in the field of green mining.

The invention discloses a roadway supporting method and a steel shed, and relates to the technical field of coal mine stoping operation, the roadway supporting method comprises the following steps: starting to excavate a stope face gate road; a first shed leg is fixedly installed along a working side of a crossheading, a second shed leg is fixedly installed along a non-working side of the crossheading, a splicing top beam is fixedly installed at the top end of the first shed leg and the top end of the second shed leg, and a reinforcing supporting piece is fixedly installed at the splicing position of the splicing top beam. A continuous concrete wall is poured on the lagging tunneling working face along the non-working side of the crossheading; in the advancing process of the stope face, the first shed leg and a first beam body in the spliced top beam are gradually dismantled; tunneling a next section of stope face crossheading on the back side of the concrete wall body; the method is more suitable for the geological conditions of the roadway in the re-mining area, operation is convenient, the construction efficiency is improved, the safety coefficient of supporting in the roadway is increased, the recycling rate of supporting materials is greatly increased, and material waste is reduced.

This invention relates to the field of mining engineering technology, specifically to a method for simulating and analyzing the support pressure distribution in a fully mechanized longwall mining face of an extra-thick coal seam. The method includes the following steps: S1. Bearing stability analysis; S2. Crack analysis; S3. Analysis of the impact of roof cutting operations; S4. Feasibility assessment of roof cutting and roadway protection; S5. Comprehensive analysis of support pressure. This invention collects stress data from coal pillars to analyze their bearing stability. It acquires and analyzes crack propagation rates through image processing to determine the severity of roof cracks. Based on the pressure parameters of the coal seam working face after roof cutting, it analyzes the effectiveness evaluation coefficient of the roof cutting operation. Through video recording and analysis, it obtains roadway deformation and surrounding rock stability, thereby analyzing the feasibility of roof cutting and roadway protection. This comprehensive analysis of the support pressure impact evaluation index of the fully mechanized longwall mining face allows for better implementation of targeted measures to ensure operational safety, optimizes mining processes and procedures, and improves mining efficiency.

The invention discloses a fully-mechanized caving mining method for a steeply-inclined super-thick coal seam, and belongs to the technical field of mining of the steeply-inclined super-thick coal seam. A working face is arranged in the steeply-inclined super-thick coal seam according to inclined long-wall mining, an air inlet rail inclined roadway and a return air transportation inclined roadway are constructed on the two sides of the working face respectively, an open-off cut is constructed along a coal seam bottom plate, and a slope for conveying coal is constructed between the end of the return air transportation inclined roadway and one end of the open-off cut; tunneling from the end of an air inlet track inclined roadway to a coal seam floor and connecting with the other end of the open-off cut to form a connection roadway; in the stoping process, undercutting is synchronously carried out on the slope, the entering connection roadway and working face stoping, a working face goaf naturally collapses, and only the goaf above the slope and the entering connection roadway is filled and supported along with mining; and the hydraulic support moves under pressure, so that mining of the whole working face is completed. The method is simple in step and convenient to use, and safe, efficient and high-recovery-rate stoping can be effectively carried out on the steeply-inclined super-thick coal seam.

This invention relates to a method for leaving large and small coal pillars in the return airway of a goaf-side excavation roadway following a replacement working face. It belongs to the field of goaf-side excavation technology and solves the technical problems of high loss rates when using large coal pillars for roadway protection in existing fully mechanized longwall mining, and significant susceptibility to mining-induced disturbances when using small coal pillars for roadway protection. The solution is as follows: A method for leaving large and small coal pillars in the return airway of a goaf-side excavation roadway following a replacement working face, comprising the following steps: 1) determining basic parameters; 2) calculating the width of the small coal pillar; 3) calculating the width of the large coal pillar; 4) calculating the safe distance of the coal pillar from which mining-induced disturbances do not affect it; 5) calculating the distance from the first working face; 6) calculating the time for the B tunneling machine to excavate from the second return airway to the small coal pillar; 7) calculating the length of the large coal pillar; 8) calculating the length of the small coal pillar. Compared with existing technologies, this invention has advantages such as improving the recovery rate of the working face, increasing profits, reducing the impact of mining-induced disturbances on roadway excavation, and facilitating subsequent production planning.

The invention relates to a drum shearer for longwall mining, comprising a machine body (1) that is movable along a longwall conveyor (6) in the longitudinal direction (S) of the longwall by means of a drive device, at least two drum arms (4) pivotably attached to the machine body, at the free ends of which a cutting drum (5) is rotatably mounted, wherein the machine body (1) has a supporting structure and wherein the drive device comprises two or more drive units (3), each with at least one drive motor (3c), a winch gearbox (3b), and a wheel housing gearbox (3a). The object of the invention is to further develop the drum shearer in such a way that the drum shearer is more flexible overall in operation.The invention proposes that the supporting structure of the machine body (1) is formed by a frame element (11,8) and that the drive units (3) can be fixed to the frame element (11,8) in a height-adjustable manner via connecting means.

The invention relates to the technical field of pressure relief effect grading evaluation of roadways, in particular to a method for evaluating the pressure relief effect of an adjacent gob roadway under long-wall mining disturbance. According to the method for evaluating the pressure relief effect of the adjacent gob roadway under the long-wall mining disturbance, the supporting stress, the fracture development degree, the surrounding rock deformation degree and the supporting resistance of the roadway are adopted as four parameters for evaluating the pressure relief effect of the roadway, quadruple evaluation indexes are formed, and an accurate roadway pressure relief effect evaluation system can be formed; meanwhile, five-level roadway pressure relief comprehensive evaluation standards of complete pressure relief, sufficient pressure relief, medium pressure relief, invalid pressure relief and harmful pressure relief are established; the real-time monitoring values of the four evaluation indexes of the roadway are substituted into an evaluation calculation formula to obtain a pressure relief comprehensive evaluation value, and then the result is compared with a five-level roadway pressure relief comprehensive evaluation standard to obtain an accurate roadway state grade after pressure relief, so that accurate judgment on the roadway pressure relief effect is realized, and the roadway pressure relief efficiency is improved. And a firm and reliable basis is provided for further adjusting a pressure relief scheme subsequently.

A mechanical ore sample testing device integrating microwaves and cutter heads, and a use method are provided. The mechanical ore sample testing device comprises an equipment platform, a cutter head cutting system, a microwave fracturing system, a loading device and a cantilever crane. The microwave fracturing system and the cutter head cutting system are fixed to the equipment platform, and the loading device and the cantilever crane are mounted at a front end of the equipment platform. A microwave mechanical longwall mining method for a metallic ore is provided. Microwaves move in sync with machines to break a rock, microwave fracturing methods comprise high-power microwave integral fracturing and local rapid fracturing of soft microwave coaxial lines in the cutter heads; and a lateral cutting method of an ore body by a cutter head technology is applied, a mechanical rock breaking principle is changed from previous extrusion breaking to tension breaking.

The invention provides a rock burst prevention and control effect tracking evaluation method and device, and relates to the technical field of coal mine safety mining. Drawing a foundation base map of the stope face based on the stope face mining drawing; based on the evaluation elements, setting an initial upper limit length of an ordinate by taking the mining mileage of the working face as a reference as an abscissa; drawing a roof lithology distribution diagram, a land subsidence curve diagram, a support pressure cloud diagram, a pressure relief project / stoping position diagram and a micro-seismic daily frequency / micro-seismic daily energy / daily stoping footage trend diagram in the foundation base diagram according to different transverse-longitudinal ratios, and building a rock burst prevention and treatment effect tracking evaluation diagram; and analyzing and predicting rock burst danger degrees of the stope face in different time periods. Therefore, each evaluation element is subjected to unified coordinate system processing by taking the recovery mileage as a reference, the horizontal coordinate is fixed, the vertical coordinate proportion is optimized, and the timeliness and the accuracy of the tracking evaluation of the rock burst prevention and control effect are realized.

A microwave-disc cutter integrated mechanical continuous mining device and a use method thereof relate to the technical field of rock breaking and comprise an equipment platform, a disc cutter cutting system, a microwave cracking system, a loading device and a cantilever crane, the microwave cracking system and the disc cutter cutting system are fixed on the equipment platform, and the loading device and the cantilever crane are installed at the front end of the equipment platform. A metal mine microwave mechanical longwall mining method is provided, rock breaking is carried out in a synchronous motion mode of microwaves and machines, the microwave cracking mode comprises overall cracking by high-power microwaves and local rapid cracking by a microwave coaxial line arranged in the disc cutter, so that the cutting speed of the ore is greatly improved; the method of cutting the side of the ore body by the disc cutter technology is adopted, the original principle of mechanical rock breaking is changed from the previous compression cracking to tension cracking, and the rock breaking cost is greatly reduced in the principle of rock breaking.

The invention belongs to the technical field of mining machines, and particularly relates to a non-coal mine pillar-free long-wall mining machine which comprises a machine body and a walking part arranged below the machine body, the side wall of the machine body is connected with an electric control box and a PLC, and arc-shaped loading plates are arranged on the left side and the right side of the machine body. In the process of mining ore in a mine by using a mining machine, the dust concentration in the mine tunnel can be automatically detected while dust removal work is carried out on the mine tunnel, and when it is detected that the dust concentration in the mine tunnel is abnormal, an operator can be reminded of the site condition in time, so that the working efficiency is improved. The device is simple in structure and convenient for operators to timely break away from the inside of the mine tunnel, when the dust concentration is abnormal due to local looseness of the mine tunnel, the escape probability of the operators is greatly improved, oil stains on the surface of the optical signal receiver can be automatically treated, and the problem of abnormal receiving of the optical signal receiver caused by the oil stains is avoided.

This invention discloses a method for determining the extraction locations of horizontally oriented long boreholes within the overlying strata of longwall mining, comprising the following steps: S1, based on the mining method and parameters of the working face, and the lithological characteristics of the overlying strata, and after analyzing the distribution of gas migration fracture channels in coal seam mining and the stability of boreholes affected by mining activities, the range of extraction locations for directional long boreholes is determined; S2, within the range of extraction locations for directional long boreholes, the location criterion value for each location is calculated; S3, based on the magnitude of the location criterion value for each location, the specific location and order of each borehole are determined. This invention reveals the extraction mechanism of horizontally oriented long boreholes from three aspects: the degree of gas accumulation within mining fractures, the permeability of mining strata, and the stability of mining boreholes. It proposes location criteria for horizontally oriented long boreholes and provides a method flow for determining the extraction locations of boreholes.

The invention relates to a shearer loader for longwall mining, having a machine body (1) which is movable along a face conveyor (6) in the longitudinal direction (S) of the longwall by means of a drive device and having at least two drum arms (4) which are pivotally attached to the machine body and at the free ends of each of which a cutting drum (5) is rotatably mounted, the machine body (1) having a support structure, and the drive device having two or more drive units (3), each of which has at least one drive motor (3c), a winch transmission (3b), and a wheel house transmission (3a). The aim of the invention is to develop the shearer loader such that the shearer loader is more flexible overall during use. For this purpose, the invention proposes that the support structure of the machine body (1) is formed by a frame element (11, 8), and the drive units (3) can be fixed to the frame element (11, 8) at an adjustable height via connecting means.