50 results about "Hard coal" patented technology

The invention relates to the technical field of coal deep processing equipment, and particularly discloses a coal preparation device which comprises coal receiving equipment, pre-crushing equipment, a coal distributing mechanism, a coal blending bin, coal blending crushing equipment and a coal tower which are sequentially arranged along a production process, and materials are conveyed among the equipment through belt conveyors; the coal receiving equipment comprises a coal receiving pit and a coal feeder arranged below the coal receiving pit; the coal distributing mechanism comprises a first coal distributing mechanism which is arranged in front of the pre-crushing equipment and is used for conveying coal types which do not need to be pre-crushed to the coal blending bin; the second coal distributing mechanism is arranged behind the pre-crushing equipment and is used for conveying the pre-crushed coal types to the coal blending bin; the plurality of coal blending bunkers are used for respectively storing different coal types, and electronic automatic batching scales are arranged below the coal blending bunkers; and iron removers are arranged between the coal receiving equipment and the pre-crushing equipment as well as between the coal blending bunker and the coal blending crushing equipment. The invention aims to solve the problems that coal with high hardness cannot be finely crushed and coal easy to crush is excessively crushed due to a process with coal blending equipment.

The invention provides a regional top coal caving dynamic control method and device for extra-thick hard coal. The method comprises the following steps: collecting top coal transportation state data; performing multi-source data processing by adopting a data-level, feature-level and decision-level fusion algorithm, and generating a top coal crushing degree evaluation result, a falling state recognition result and a top plate stability analysis result; performing multi-model collaborative reasoning by utilizing a D-S evidence theory, fuzzy logic and a Bayesian network according to a top coal crushing degree evaluation result, a falling state recognition result and a top plate stability analysis result, and generating opening and closing time prediction and control instructions of a coal discharge port of each region; and the control instruction is issued to a hydraulic support through an electro-hydraulic control system, differentiated opening and closing control over the regional coal caving openings is achieved, and a control strategy is dynamically adjusted according to real-time feedback data. According to the method, regional dynamic accurate control over the top coal caving process of the extra-thick hard coal seam is achieved, the top coal recovery rate is remarkably increased, the gangue mixing rate and the support instability risk are reduced, and the mining efficiency and safety are improved.

The invention relates to the technical field of coal seam gas extraction, in particular to a gas extraction method for a soft and hard coal composite area. In the drilling and production process, drilling cuttings and drilling machine mechanical parameters along with the coal seam; soft and hard coal area demarcation and characteristics are dynamically discriminated, and spatial interpolation and three-dimensional geological modeling are carried out in combination with the drilling spatial position; the boundary radiuses of the soft coal area, the hard coal area and the transition area of the soft coal and the hard coal are obtained through calculation, permeation increasing measures are arranged for drilling operation of the corresponding coal seam areas respectively, and hydraulic measure parameters are adjusted; and observing to obtain the fracture expansion range and the size of the cavity, and performing gas extraction when the conditions are met. According to the method, the gas extraction effect of the different coal seam composite area is improved by dynamically recognizing the soft and hard coal areas and combining the areas with precise gas treatment. The method can guide actual gas extraction engineering in the underground coal mine field, and is of great significance to the related fields of carbon sequestration, coal bed gas development and mine gas control.

The present application belongs to the field of coal mine drilling, and particularly relates to a reamer for directional long drilling of coal seams; the reamer comprises a reamer barrel, a strip-shaped groove is uniformly formed on the inner wall of the reamer barrel along the circumferential direction, a cutter seat is slidably arranged in the strip-shaped groove, and a cutter wing is mounted on the cutter seat; a top plate penetrating through the cutter seat is further hingedly arranged on the cutter seat, a driving part for driving all the cutter seats to synchronously slide up and down in the strip-shaped groove is further arranged in the reamer barrel, and the cutter wing is used for adjusting the position of the cutter wing protruding from the outer wall of the reamer barrel and further adjusting the cutting diameter during the up-and-down sliding of the cutter seat in the strip-shaped groove; the driving part further cooperates with the top plate to drive the top plate to swing and remove the coal ash in the gap of the cutter wing; the present application reduces the abrasion from layered cutting, cooperates with self-cleaning and heat dissipation to maintain the cutting efficiency, dynamically adjusts the hole diameter and real-time performs the hole wall trimming during the reaming process, and forms a functional closed loop from the local to the whole to jointly solve the problems of tool life, chip removal and hole forming accuracy in the reaming of hard coal seams.

The invention discloses an active crushing control method of a hydraulic cutter type top coal caving support, and belongs to the technical field of coal mine intelligent control. The method comprises five steps of frame moving and locking, parameter setting, active crushing, pressure maintaining and expanding and retracting and resetting, crushing parameters can be adjusted in a self-adaptive mode, an extension structure is compatible, and dual-mode control and platform butt joint are supported. The method solves the problems of poor crushing and low recovery rate of traditional passive top coal caving, is suitable for various hard coal working faces, and can be used for transforming new supports and old supports.

The present invention relates to the technical field of coal mine equipment, and specifically to a roof stability monitoring and control and coal wall weakening method based on a hydraulic support. By constructing a roof stability monitoring and early warning model, the working face roof condition is monitored by a hydraulic support, and the hydraulic support is dynamically adjusted based on roof feature recognition and dynamic zoning to improve the crushing effect of thick hard coal seams, predict the roof condition in the working face advancement direction, change the hydraulic support pressure regulation strategy in real time, and eliminate the lag in the adjustment and adaptation of the existing pressure regulation strategy.

The invention discloses a mining device and a mining method suitable for a hard ore body, and belongs to the technical field of hard coal mining. The device comprises an unmanned mining car, an adjusting mechanical arm is installed on the unmanned mining car, a rotary rock breaking machine is detachably connected to the adjusting mechanical arm, and an ore shoveling bucket is installed on a car head of the unmanned mining car; a buffer assembly is installed at the joint of the adjusting mechanical arm and the rotary rock breaking machine, when the rotary rock breaking machine makes contact with ore for operation, the rotary rock breaking machine moves through a sliding rod and compresses a buffer spring, and then vibration force of the rotary rock breaking machine during ore excavation can be buffered; the vibration force transmitted to the adjusting mechanical arm or the unmanned mining vehicle is reduced, and when the rotary rock breaking machine makes contact with harder rock, the rotary rock breaking machine can be protected, and the service life of the rotary rock breaking machine is prolonged.

The invention discloses an intelligent cooperative system and method for graded utilization of multi-concentration gas in a deep coal mine. A high-concentration gas extraction unit conveys gas with the concentration exceeding 30% to the ground; the low-concentration gas movable in-situ utilization unit has three functions, gas with the concentration lower than 8% at different positions is collected and purified to serve as power fuel for underground movement of the gas, the surplus high-concentration gas after movement and energy consumption is merged into the high-concentration gas extraction unit, and the gas utilization rate is increased; meanwhile, in the moving process, an environment monitoring module carried by the device can carry out environment monitoring on different underground positions; according to the medium-concentration gas controllable combustion rock breaking unit, medium-concentration gas with the concentration ranging from 8% to 30% can be subjected to impact rock breaking through a water open fire restraining double-layer cavity combustion and explosion structure, and the purpose that existing rock breaking machinery is assisted in breaking hard rock (hard coal) is achieved. Under the regulation and control of a control center, the system formed by the equipment is mutually coordinated and matched, and the coal mine gas can be classified, divided into sources and accurately utilized underground.

The present invention relates to the field of coal mining, and in particular to an integrated support for gob-side entry driving with double roadway layout and a coal mining method with multi-functional use of one roadway. In combination with the limitations of the existing double roadway driving technology for working faces with extremely long advancing distances and the limitation that the gob-side entry driving technology results in isolated working faces due to skip mining, which cannot guarantee the efficient production of the working face. An integrated support for gob-side entry driving with double roadway layout and a coal mining method with multi-functional use of one roadway are proposed. The present invention is applicable to mining areas with relatively large coal seam thicknesses, and the coal mining roadways can be longitudinally arranged with "one high, one low, and horizontal stagger"; in mines with relatively hard coal quality, high gas content, and dynamic disaster problems in the coal seam and roof, the function of "multi-functional use of one roadway" can be fully realized. This method achieves the following effects: improving the recovery rate of coal resources in the mine; facilitating roadway maintenance; the gob-side entry driving along the roof can be used as a pressure relief roadway, a gas drainage roadway, or to realize functions such as weakening the top coal according to the actual situation of the mine, achieving the effect of "multi-functional use of one roadway" for the gob-side entry driving along the roof.

The application discloses a hard coal seam acoustic wave penetration method, comprising the following steps: sampling coal blocks of a hard coal seam to be penetrated, and obtaining tensile strength and shear strength of the coal blocks; drilling a working borehole in the hard coal seam, and impacting the working borehole at a set working strength, so that the strength of an impact wave generated by the impacting is lower than the strength at which the impact wave generates a crushing zone in the hard coal seam; the impact wave generated by the impacting cracks the hard coal seam around the working borehole, the impact wave attenuates after cracking the hard coal seam, and forms an acoustic wave, and the acoustic wave penetrates the hard coal seam. The application solves the problem that an effective high-strength sound source capable of being loaded to a coal seam is difficult to develop in the prior art. The application cracks the coal seam around the borehole by impacting, and the acoustic wave attenuated by the impact force excites the coal seam. The application can obtain a high-strength acoustic wave directly loaded to the hard coal seam. The application can promote gas desorption, and meets the demand of gas treatment.

The invention discloses a coal mine roof blasting scheme determining method and device, equipment, a medium and a product, and relates to the technical field of coal mine thick and hard roof blasting pressure relief. According to the engineering geological conditions, a blasting scheme determination expert system is adopted, and a coal mine roof blasting scheme of the target blasting area is obtained; a knowledge base of the blasting scheme determination expert system comprises a typical case database and a blasting rule knowledge base. The expert system is applied to determination of the coal mine roof blasting scheme, the expert system knowledge base is constructed according to the typical case database and the blasting rule knowledge base, and a basis is provided for intelligent optimization of the coal mine roof blasting scheme.

The application provides a phase-change detonation directional metal jetting permeability enhancement process method, which is suitable for coal seam roof and floor rock mass and medium-hard coal body. Single or multiple phase-change detonation metal jetting equipment is installed on a drill rod and pushed into a target area, and the target area is subjected to directional pressure relief and permeability enhancement by using the phase-change detonation metal jetting equipment. The phase-change detonation metal jetting equipment comprises a pressure-bearing packer, a perforator and a gas tank, the gas tank is filled with liquid carbon dioxide, and a phase-change exciter and a phase-change instantaneous delay exciter are arranged on the gas tank. The liquid carbon dioxide is excited to change into a gaseous state, high-pressure detonation energy is generated, a bullet head is directed to jet into the target area, and a permeability enhancement hole is formed. Single or multiple continuous composite permeability enhancement can be realized, and the permeability of the coal seam is improved. The phase-change detonation directional metal jetting equipment has a reasonable structure, is easy to operate, has a wide application range, and can effectively improve the gas extraction rate and the mining safety. The application has the advantages of high efficiency, safety and controllability, overcomes the limitations of traditional permeability enhancement methods, has a remarkable permeability enhancement effect, and has a wide application prospect.

The invention belongs to the technical field of coal mining, and provides a roller blasting height-adjustable open pit coal mine coal mining and stripping machine which comprises a walking chassis mechanism and a control transmission unit, and the control transmission unit is used for controlling the walking chassis mechanism and remotely transmitting information to a construction site console; a driving groove is formed in the upper portion of the walking chassis mechanism, and during use, a user remotely controls two second hydraulic rods fixedly installed on the inner wall of the driving groove to stretch out and draw back through a 4G transmission unit and a controller on a console of a construction site; according to the coal mining spiral roller drilling device, the two hydraulic rods can drive sliding protrusions fixedly installed at the other ends of the two second hydraulic rods to be arranged below a movable frame to slide on the inner wall of a driving groove, driving of the movable frame is further achieved, and in other words, when a coal mining spiral roller is drilled, a user can drive the coal mining spiral roller to move by driving the movable frame, and the drilling efficiency is improved. Therefore, the device can be stably inserted into the surface of a hard coal seam or a rock layer.

The present invention discloses a combined storage and improvement method of sand-carrying oxidant pulse injection-static fracturing for hard coal seams. The method comprises the following steps: first, a sand-carrying oxidant liquid is pulsed injected into the coal seam, and the oxidant liquid impacts the coal body under the water wedge degradation effect of the pulse wave. Simultaneously, the oxidant liquid contacts the coal body during the impact process to carry out an oxidation reaction, so that the coal body forms a fracturing weak surface and generates microcracks. Then, small quartz sand particles and the oxidant liquid are squeezed into the microcracks to expand and extend the microcracks, while increasing the contact area between the oxidant liquid and the coal body, thereby enhancing the oxidation effect and providing more fracturing weak surfaces for subsequent static fracturing. Subsequently, the sand-carrying fracturing fluid is injected into the coal seam for static fracturing, so that the microcracks in the fracturing weak surface converge, develop and expand longitudinally, and large quartz sand particles are squeezed into the expanded cracks to further expand and extend the hole. By alternately performing the oxidant pulse injection and static fracturing processes, a complex fracture network is continuously formed inside the coal seam, and finally in-situ oxidation-static fracturing progressive permeability enhancement of the coal seam is completed.

The application discloses a coal mine roadway coal seam tunneling pressure relief device and method, and relates to the field of coal mine roadway coal seam tunneling pressure relief devices and methods. The pressure relief device comprises a caterpillar tractor and a drill rod. The drill rod comprises a drill rod body, a first oil cavity extending along the length direction of the drill rod body, and a second oil cavity extending along the radial direction of the drill rod body and being in communication with the first oil cavity. A piston rod is adapted in the second oil cavity, and the piston rod can switch between an extended position outside the second oil cavity and a retracted position inside the second oil cavity. A first grouting pipe is arranged along the extension direction of the first oil cavity, and a second grouting pipe is arranged along the extension direction of the second oil cavity and is in communication with the first grouting pipe. The second grouting pipe is sequentially provided in the second oil cavity and the piston rod. When hydraulic fracturing is needed for the drill hole drilled by the drill rod body, the piston rod is switched from the retracted position to the extended position to form a fracture hole. When pressure relief is needed for hard coal bodies, silent expansion liquid is injected into the fracture hole through the first grouting pipe and the second grouting pipe.

This invention discloses a hammer-type coal cutter, comprising a trolley, a motor, and a cutting drum. The trolley includes a frame, handles, and wheels, with the handles and wheels connected to the frame. The motor is mounted on the frame. The cutting drum includes a drum shaft and several hammers. The drum shaft is rotatably mounted on the frame and extends horizontally. One end of each hammer is movably connected to the drum shaft. The motor drives the drum shaft to rotate. The hammer-type coal cutter disclosed in this invention has high coal cutting efficiency. Through the high-speed rotation of the cutting drum, the hammers repeatedly strike the coal at the bottom of the drum, peeling away the hard coal layer by layer, saving manpower. Furthermore, the hammer-type coal cutter has a simple and compact structure, small dimensions, and the cutting drum can extend to the bottom of the bottom conveyor belt for operation, making it suitable for use in narrow roadways.

The invention relates to the production of low-CO2 wood pellets with high energy density by adding coal dust, such as wood, hard coal or lignite dust, during the production process.

The invention relates to the technical field of coal and coal bed gas co-mining, in particular to a coal bed gas multi-branch horizontal well ground coal extraction rapid pressure relief extraction system and method.The method comprises the steps that a ground horizontal well is arranged, specifically, a first drilling well is drilled to the position 60 m below a stable bed rock, and a second drilling well is drilled to the position within the range of 1-2 m from the end of a deflecting section to a coal bed top plate / coal bed bottom plate; the horizontal main branch section and the coal seam are drilled in parallel, windowing drilling of each branch section is completed in a backward mode from the far-end horizontal main branch section deviating from the first drilling well in sequence, the branch sections are provided with diameter-expanding coal digging caves, and a drilling track penetrating through the coal seam between a coal seam top plate and a coal seam bottom plate is formed; and drainage and mining equipment is installed for negative-pressure extraction, and rapid gas seeing and continuous high yield of the coal-bed gas well are achieved. The mode that the horizontal main branch section is drilled in the stable coal seam top plate or coal seam bottom plate is adopted, compared with coal seam drilling, the stable and hard coal seam top plate or coal seam bottom plate is easier, the well wall is more stable, collapse is not prone to occurring in the extraction process, and the method is suitable for long-term production.

The invention discloses a super-large mining height extra-thick hard coal top coal caving mining ratio determination method, which comprises the following steps: S1, carrying out stability analysis on a coal wall of a working surface, and determining a first mechanical mining height range H1 of a coal mining machine according to a strain range of the coal wall; s2, constructing a top coal body cantilever mechanical model, deducing to obtain a relational expression between the top coal thickness and the limit suspended top length, and determining a second machine mining height range H2 of the coal mining machine in combination with the coal caving step pitch parameter; and S3, comparing the first mechanical mining height range H1 with the second mechanical mining height range H2, if an overlapping area exists between the first mechanical mining height range H1 and the second mechanical mining height range H2, selecting the maximum value in the overlapping area as the mechanical mining height of the coal mining machine, and if the overlapping area does not exist between the first mechanical mining height range H1 and the second mechanical mining height range H2, selecting the maximum value in the first mechanical mining height range H1 as the mechanical mining height of the coal mining machine. The method for determining the top coal caving ratio of the extra-large mining height extra-thick hard coal has the advantages of being simple in step, high in safety performance and the like.

The present application relates to the technical field of coal seam mining, in particular to a coal pillar-free mining method suitable for thick and hard coal seam fully-mechanized caving face, comprising: first reinforcing the upper section track roadway; constructing a top breaking hole and a directional long borehole in the upper section track roadway; performing hydraulic fracturing through the directional long borehole; performing blasting top breaking through the top breaking hole; performing mining on the upper section working face and second reinforcing the upper section track roadway. The present application cuts off the stress transmission path of the goaf and the roadway roof rock stratum by directional blasting top breaking, improves the stress environment of the end of the working face surrounding rock; the thick and hard top coal is weakened by directional borehole hydraulic fracturing technology, which improves the top coal caving property and the coal recovery rate of the working face; in addition, the directional blasting top breaking and directional borehole hydraulic fracturing are performed before the mining of the working face, which does not increase the construction process during the mining of the working face.

The present invention relates to a method for highly efficient gas control in a large area of medium-hard coal seams throughout the whole time and space, belonging to the field of coal mine gas control. The method includes the following steps: Step S1, arranging a number of long directional boreholes along the coal seam inside the coal seam; Step S2, arranging a number of high-level directional branch long boreholes at the roof of the coal seam; Step S3, connecting to the gas drainage pipeline for gas drainage. This method realizes the highly efficient control of gas hazards in a large area, ahead of time, throughout the whole time and space from the source by developing the up and down mountain roadways. By means of hydraulic fracturing long directional boreholes, ordinary long directional boreholes, high-level directional branch long boreholes, etc., it can achieve the highly efficient control of gas in the whole time and space in the coal roadway, fracture zone, upper corner, coal face, adjacent seam, goaf during the mining process of medium-hard coal seams, solves the technical problems of the existing gas control methods that cannot be controlled ahead of time in terms of time, cannot cover the whole area in terms of space, and cannot achieve large-area ahead and highly efficient control in terms of efficiency, and reduces the engineering quantity and cost of gas control.

The invention relates to a method for producing smokeless and odorless briquettes from fine-grained heterogeneous coal fractions using tamarind seed gum as a binder.

The invention discloses a coal blending system which is characterized in that all hard coal blending units and non-hard coal blending units in the coal blending system are arranged in a row along a first direction, namely all the coal blending units are arranged in a single row; different kinds of coal in the coal transfer station can be conveyed to the corresponding coal blending units only by arranging one first conveying component above the coal blending units, the number of conveying devices above the coal blending units is reduced by one time, the height of a feeding conveyor is reduced, dust removal devices are reduced, and the civil engineering investment cost is reduced.

The utility model discloses coal seam directional fracturing gas extraction equipment, which relates to the field of coal mine gas anti-reflection extraction and comprises a fracturing extraction pipe, and a fracturing extraction cavity and a sealing element are fixed on the fracturing extraction pipe. When the method is used for fracturing the coal seam, if the coal seam cannot be fractured only by means of the fracturing fluid, the fracturing extraction cavity can control the fracturing fluid to violently impact the hard coal seam to force the coal seam to be fractured, so that the overall fracturing effect of the coal seam is improved, and then efficient extraction of coal seam gas is improved.

The invention belongs to the field of coal mine drilling, and particularly relates to a reamer for coal seam directional long drilling. Comprising a chambering cutter cylinder, strip-shaped grooves are evenly formed in the inner wall of the chambering cutter cylinder in the circumferential direction of the chambering cutter cylinder, cutter holders are slidably arranged in the strip-shaped grooves, and cutter wings are installed on the cutter holders; the tool aprons are further provided with ejector plates penetrating through the tool aprons in a hinged mode, driving parts used for driving all the tool aprons to synchronously slide up and down in the strip-shaped grooves are further arranged in the broaching tool cylinder, and the tool aprons are used for adjusting the positions, protruding out of the outer wall of the broaching tool cylinder, of the tool wings in the up-down sliding process in the strip-shaped grooves so that the cutting diameter can be adjusted. The driving part is further matched with the ejector plate to drive the ejector plate to swing to remove coal ash in gaps of the cutter wings. Layered cutting is used for reducing abrasion, self-cleaning heat dissipation is matched for maintaining the cutting efficiency, meanwhile, the hole diameter is dynamically adjusted in the reaming process, hole wall finishing is conducted in real time, the three parts form a function closed loop from a local part to an overall part, and the problems of cutter service life, chip removal and hole forming precision in hard coal seam reaming are jointly solved.

This invention discloses a method for evaluating the operational status of a mining drilling rig system based on an echo-state Bayesian neural network. This method addresses the challenges of dynamic feature extraction, model overfitting, and the lack of uncertainty quantification in deterministic assessments of drilling rig status under conditions of strong vibration and high noise in underground environments. It employs an echo-state network with a leakage integral mechanism to suppress noise and extract slowly varying dynamic features from multi-source sensor time-series data, constructing a high-dimensional feature vector through dual-view feature aggregation. A Bayesian neural network with Concrete Dropout is introduced to achieve state probability mapping based on variational inference, and Monte Carlo sampling and prediction entropy are combined to quantify cognitive uncertainty and provide early warning of high-entropy anomalies. This invention effectively filters out high-frequency noise, suppresses overfitting in small samples, and enables proactive early warning of abnormal operating conditions. It achieves high classification accuracy on hard coal seam drilling datasets, and its assessment accuracy and decision reliability are significantly superior to traditional deep learning models.

The invention relates to the technical field of raw coal conveying of thermal power plants, in particular to a feeding and conveying device of a coal feeder of a thermal power plant, and adopts the technical scheme that the feeding and conveying device comprises a machine shell, a feeding cylinder is fixedly connected to the top end of the machine shell, and a coal outlet is fixedly connected to the bottom of one side of the machine shell. Raw coal in the coal bunker can be controlled to fall down through the feeding cylinder, after the raw coal falls onto the conveying belt, the raw coal can be conveyed to one side through the conveying belt, by arranging the flattening assembly, the raw coal can be evenly spread on the conveying belt, and when caked coal blocks are encountered, the large coal blocks can be crushed through the crushing assembly, so that the coal blocks are crushed, and the coal blocks are conveyed to one side through the conveying belt. And when the raw coal passes through the flattening assembly, the crushing assembly can generate vibration to promote the hard coal briquettes to be crushed when the raw coal meets the hard coal briquettes, the weighed raw coal can be conveyed into and out of the coal inlet through the conveying belt and enters the coal mill through the coal outlet, and the problem that the caked coal briquettes are prone to being stacked on the conveying device is solved.

The invention discloses an underground soft and hard coal identification method based on fine-grained image classification, and the method comprises the steps: constructing a BSMF-MobileNetV2 model, employing a gray histogram and a gray co-occurrence matrix to extract color and texture features through setting a single channel for the color and texture feature attributes of an image, carrying out the screening of the color and texture features based on a random forest algorithm, and carrying out the recognition of the soft and hard coal. Preferentially selecting the feature with the maximum inter-class difference to construct a feature fusion model; and the color texture attributes and the soft and hard coal image enhanced by the MSRCR algorithm are subjected to adaptive feature fusion, so that the characterization capability of the model on color and texture features can be enhanced, and the accuracy of the model is further improved.

The application discloses an integrated device suitable for coring and coal removing in hard coal seam and a use method thereof, and comprises a coal removing power unit (34), a coring unit (35), a supporting unit (39) and a buffer collecting unit (40). The power output end of the coal removing power unit (34) is connected with one port of the coring unit (35), the coring unit (35) is arranged on the supporting unit (39), and the other port of the coring unit (35) is connected with the buffer collecting unit (40). The application is specially suitable for coring sampling and coal removing operation in hard coal seam. The integrated device can realize labor-saving, rapid and successful removal of coal samples in a coring cylinder, does not need to use electricity, has high safety in underground operation, and can improve the correctness of gas content testing and the coring efficiency.