1568results about "Props/chocks" patented technology

The invention provides a gob-side roadway roof cutting pressure relief supporting structure and method, and belongs to the technical field of coal mining construction. And the inclined coal seam roof-cutting pressure-relief coal-pillar-free asymmetric roadway support is realized. According to the technical scheme, the system comprises a gob-side roadway formed along the inclined coal seam and an anchor net beam grouting comprehensive supporting system arranged on the gob-side roadway; and a waste rock blocking device is arranged in the gob-side roadway. The method has the beneficial effects that after the holes are drilled in the rock stratum, the pulse waves are used for conducting directional fracturing on the rock stratum, the kerfs are formed between the adjacent drill holes, directional cutting of the basic roof and the immediate roof of the gob-side entry retaining is achieved, after working face recovery, the basic roof is subjected to shear fracture in the pre-splitting kerfs, the length of a lateral cantilever is reduced, and pressure relief is completed. And meanwhile, for a fracture surface which is seriously impacted by roof crushing and goaf gangue tumbling, a composite supporting system is formed in a way of filling high-water materials beside a roadway and bolting-grouting supporting in combination with early-stage anchor net cable supporting.

The utility model discloses an auxiliary supporting structure for a mine, which relates to the technical field of mine supporting and comprises a fixing frame, a driving mechanism is movably mounted in the fixing frame, and an adjusting mechanism is fixedly mounted on one side of the fixing frame. By the adoption of the structure, when the device is used, the lead screw can be assisted to rotate through the adjusting mechanism, then the sliding rod is driven to slide in the sleeve frame, the connecting plate is driven to move outwards, when the supporting plate makes contact with the inner wall of a mine, the supporting plate can rotate in a self-adaptive mode due to the hinge ball design of the fixing base, and the rotating adaptation range can be enlarged through cooperation of the connecting plate and the reserved groove; the device can adapt to an inclined plane in a mine and is high in adaptive capacity, the friction force of the outer side of the supporting plate can be increased through the anti-skid conical teeth so as to improve the stability, bolts or anchor rods can be inserted into the mounting holes when needed, stable supporting is achieved, and therefore the overall comprehensive stability of the device is improved, and the device can better adapt to different mine environments and provide reliable supporting.

The invention discloses a pressure relief and shock absorption method for a deep high-stress key pillar. (a) a top plate is arranged at the top of the ore pillar, four inclined kerfs are alternately arranged in a top plate area around the ore pillar, and the kerfs are symmetrically arranged in a cross shape; (b) eight anchor rod drill holes perpendicular to the top plate are formed in the interval area between the adjacent kerfs and the periphery of the ore pillar, perpendicular anchor rods are arranged in the anchor rod drill holes, and an orthogonal supporting network formed by the perpendicular anchor rods is formed; and (c) preferentially releasing the bending energy of the roof through the kerf, reducing the vertical load of the ore pillar, and meanwhile, forming a pressure arch effect by applying the prestress of the vertical anchor rod, thereby realizing space-time coupling support of the kerf and the anchor rod, and inhibiting roof separation and dynamic disturbance. The invention has the characteristics of excellent stress transfer, strong vibration suppression and excellent overall column stability.

The invention discloses a coal mine fully mechanized coal mining face multi-mode prediction type intelligent straightening system and method.The system comprises a multi-mode sensing network, a data fusion prediction module and a control optimization module, and thermal imaging double cameras, pressure / dip angle / stroke / distance measuring sensors and laser scanners are arranged on hydraulic supports and inspection equipment; the comprehensive sensing of the working environment of the fully mechanized coal mining face is realized; fusing visible light, infrared, point cloud and state parameter data, and performing support attitude estimation and trend prediction by adopting Kalman filtering and an LSTM neural network; according to the intelligent support control system and the control method thereof, self-adaptive dynamic straightening control is executed based on a prediction result, remote monitoring and a closed-loop optimization mechanism are combined, the support control precision and the operation safety are improved, the automation level and the response capability of fully-mechanized coal mining operation are improved, and the intelligent support control system is suitable for complex mine pressure conditions.

The invention belongs to the technical field of underground space supporting, and particularly relates to a supporting device for underground space. Comprising a supporting column, a base is arranged under the supporting column, a supporting arm is hinged to the outer side wall of the upper half section of the supporting column, an inner bearing column is independently installed in the supporting column in a penetrating mode, supporting feet are hinged to the outer side wall of the lower half section of the supporting column, and a through hole communicating the inside and the outside is formed in the outer side of the supporting column; a connecting plate independent of the supporting column is arranged in the supporting column, the supporting legs are connected with pull ropes, and all the pull ropes penetrate through the through holes to be connected to the connecting plate. A connecting column is fixed to the lower end of the inner bearing column, and the lower end of the connecting column abuts against the top of the connecting plate. The supporting ends of the supporting legs abut against the top of the base. According to the invention, the purposes of synchronously completing the opening of the supporting plate and the locking of the height of the supporting column, reducing the operation steps, enabling the installation work of the supporting column to be more convenient, and improving the installation work efficiency are achieved.

The utility model relates to the technical field of roadway tunneling supports, and discloses a roadway tunneling support forepoling protection mechanism which comprises a first protection net frame, two symmetrical fixing blocks are arranged at one end of the first protection net frame, protection mechanisms are arranged on the faces, close to each other, of the two fixing blocks, and a second protection net frame is arranged at the bottom of the first protection net frame. Adjusting mechanisms for adjusting the position of the second protective net frame are arranged at the two ends of the second protective net frame, a driving device for driving the adjusting mechanisms is arranged at one end of one fixing block, and each adjusting mechanism comprises two symmetrical mounting blocks fixed to the bottom of the first protective net frame. When the motor runs, the first bevel gear can drive the first lead screw to rotate, the first sliding block can drive the second protection net frame to move, the length of the second protection net frame can be adjusted, and then the effect of automatically adjusting the length area of the first protection net frame is achieved.

The invention provides a close-distance coal seam roof-cutting self-roadway-forming design method, relates to the technical field of coal mining safety control, and aims to solve the problems of high supporting difficulty and poor stability during mining of a close-distance coal seam under an overlying goaf at present, considers the influence of collapse of the overlying goaf on a roadway and takes the self-weight of a working face roof as a basis. Supporting design is conducted in different areas, confined concrete columns and unit hydraulic supports are introduced for alternate supporting, active and passive collaborative supporting is achieved, the supporting difficulty is reduced, and the roadway stability is improved.

The invention provides a withdrawing robot for fully-mechanized coal mining equipment, and relates to the field of coal mining equipment. The withdrawing robot for the fully-mechanized coal mining equipment comprises a chassis assembly, an advancing assembly and a swing type dragging assembly, the advancing assembly is installed on the chassis assembly and is transversely and slidably connected with the chassis assembly, the swing type dragging assembly is fixedly installed on the advancing assembly, the chassis assembly comprises a transportation flat plate, and a plurality of long rails are arranged at one end of the surface of the transportation flat plate; the advancing assembly slides in cooperation with the long rail, a plurality of crow plates are hinged to the end, away from the long rail, of the transportation flat plate, and the upper end face of each crow plate is of an arc-shaped structure. According to the withdrawing robot for the fully-mechanized coal mining equipment, by arranging the chassis assembly, the swing type dragging assembly and the advancing assembly, the fully-mechanized coal mining equipment can be withdrawn with low resistance and high efficiency, the dragging self-immobilization degree is high, and the robot is not prone to slipping underground. And the device is also suitable for withdrawing equipment in a mine tunnel with a gradient.

The utility model discloses a spraying device for a front coal caving hydraulic support, which relates to the technical field of coal mining equipment and is mounted in a front beam box of the front coal caving hydraulic support. The device comprises a fixed seat, the fixed seat is fixedly installed on a telescopic beam of a front coal caving hydraulic support, a guide pipe is clamped on the fixed seat, the front end of the guide pipe penetrates out of the telescopic beam and is provided with a nozzle in a sealed mode, the rear end of the guide pipe is connected with a straight-through part, and the straight-through part is connected with an external water pipe. The device has the beneficial effects that the device has dustproof and dust-falling functions; the spraying device is installed in the box type of the front beam of the hydraulic support, compared with a traditional spraying device, the spraying device can solve the problems that when the spraying device is shielded after a protection side is retracted and the front beam lowers the head to discharge coal, dust removal action cannot be conducted on dropped coal, and the like, and has the advantages of being neat in appearance, safe, reliable, long in service life and the like. The spraying system is not influenced by the withdrawing of the protective plate, and the dust removal effect on the fallen coal can be realized when the coal is placed below the front beam; and the spraying direction is always advanced, so that pedestrians are not influenced.

The single spiral supporting column comprises a supporting column body, a supporting cylinder and a protective cylinder, a first adjusting cylinder is movably inserted into the top of the supporting cylinder, a first sleeve is movably inserted into the top of the first adjusting cylinder, the bottom of the supporting column body is movably inserted into the first sleeve, and a stabilizing mechanism is arranged on the supporting cylinder; a first adjusting cylinder is movably inserted in the supporting cylinder, a protective cylinder is movably inserted in the first adjusting cylinder, a second adjusting cylinder is movably inserted in the protective cylinder, a second sleeve is movably inserted in the second adjusting cylinder, a supporting column top is movably arranged in the second sleeve, and limiting mechanisms are arranged on the supporting cylinder, the protective cylinder, the first adjusting cylinder and the second adjusting cylinder. The top wall of the protection cylinder can be more tightly attached to the inner top wall of the mine tunnel by only needing one worker to step on one supporting leg with one foot and then rotating the rotating rod on the supporting column with two hands, the stability of the whole device can be guaranteed through the overall structure, meanwhile, the supporting procedure can be completed by one person, the labor cost is saved, and more time and labor are saved.

The invention provides a supporting system for treating collapse of a layered tunnel vault and a construction method, and relates to the field of tunnel engineering.The supporting system comprises a top surrounding rock reinforcing unit and a tunnel main body structure which are arranged in a tunnel collapse area, and the supporting system is further provided with an arched I-shaped steel unit which is located in the tunnel main body structure to form primary supporting; and a supporting structure reinforcing unit for resisting the rock pressure in the tunnel collapse area and reinforcing the supporting force is arranged on the arched I-shaped steel unit. Through the cooperation of the structures, the structure has the following beneficial effects that firstly, the layered rock mass is asymmetrically reinforced through the grouting anchor rods, and the integrity and the self-bearing capacity of the top surrounding rock are improved to the maximum extent; and secondly, the surrounding rock is supported and reinforced through the spring rod supporting component, the secondary collapse phenomenon caused by overweight backfilled concrete or poor cohesiveness of the surrounding rock is avoided, and a concrete sealing layer with the thickness of 10 cm is laid on the surface of the surrounding rock through the concrete spraying technology.

The invention belongs to the technical field of island construction engineering, deep-sea mining and metal excavation stability, and discloses a method for arranging a combined vertical artificial column system based on a dangerous area. According to the method, the three-level artificial columns are scientifically reserved for the horizontal dangerous area in combination with calculation of field data. According to the scheme, the artificial columns which are higher in bearing capacity and better in stability compared with natural columns are adopted, and reasonable calculation and arrangement of the reserved size, the reserved thickness and the reserved position are conducted on the combined vertical artificial column system based on all excavation horizontal dangerous areas in the excavation process; the artificial column system has a supporting effect on surrounding rocks on different excavation levels and different vertical sections from the three-dimensional whole of a mining area. And the artificial columns at all levels cooperate to jointly bear the load effect, so that the stability of the surrounding rock of the stope is improved, and the safety of workers and operation equipment is more favorably guaranteed.

The invention belongs to the technical field of coal mine underground auxiliary transportation equipment, and particularly relates to a vehicle body stability control system of a support withdrawing tractor and a control method of the vehicle body stability control system. Comprising a frame which is provided with a walking mechanism; the supporting and jacking mechanism is arranged on the frame, and a supporting and jacking oil cylinder is arranged between the supporting and jacking mechanism and the frame; the working mechanism is mounted on the frame, and the working mechanism comprises a telescopic mechanism which is hinged to the frame; the slewing mechanism is installed at the front end of the telescopic mechanism, a variable-amplitude oil cylinder is arranged between the telescopic mechanism and the slewing mechanism, and the telescopic mechanism swings up and down under the action of the variable-amplitude oil cylinder. The safety accidents such as tipping and sideslip caused by the fact that force needed by vehicle hoisting cannot be predicted are avoided, the vehicle is controlled not to longitudinally turn and sideslip, and operation safety is guaranteed.

The invention discloses an urban underground space engineering excavation supporting device, which belongs to the technical field of engineering excavation supporting, and comprises side supporting mechanisms and a transverse supporting mechanism, and the transverse supporting mechanism is arranged between the two side supporting mechanisms. The side supporting mechanism comprises a supporting height adjusting assembly, a secondary auxiliary side fixing assembly, an arched supporting angle adjusting assembly and a crank body, the supporting height adjusting assembly comprises a clamping head and a lower sliding seat, one end of the crank body can be clamped in the clamping head, and the crank body rotates to drive the lower sliding seat to move up and down; the arch-shaped supporting angle adjusting assembly comprises a threaded pull rod and a threaded sleeve. By arranging the side supporting mechanisms and the transverse supporting mechanism, the supporting function of underground space engineering excavation tunnels with different widths can be achieved only by adjusting the distance between the two side supporting mechanisms without the help of a power source, and the overall stability and bearing capacity are improved through cooperation of the side supporting mechanisms and the transverse supporting mechanism.

A multi-stage anti-impact energy absorption structure of a hydraulic column solves the problems of the existing anti-impact energy absorption mechanism of the hydraulic column, such as complex buffer structure, large space occupation, high manufacturing cost, limited impact energy that can be absorbed, inability to meet use requirements, large later maintenance workload, high maintenance cost, and long operation cycle for restoring tunnel support. It includes a multi-stage shear pressure column, characterized in that: a buffer energy absorption sleeve is provided at the lower part of the multi-stage shear pressure column, and the upper end opening of the inner cavity of the buffer energy absorption sleeve is plugged into the lower end of the multi-stage shear pressure column; a multi-stage anti-impact shear plate is fixedly provided in the inner cavity of the buffer energy absorption sleeve, and the multi-stage anti-impact shear plate is located below the multi-stage shear pressure column. It has a reasonable design and a compact structure, can realize multi-stage energy absorption buffering, can effectively absorb a large amount of impact energy, protect the structure of the hydraulic column, has good safety, is convenient for later maintenance, has a low production cost, and is flexible and reliable to use.

The invention relates to the technical field of support withdrawing processes, in particular to an ultra-large mining height hydraulic support withdrawing process which comprises the following steps: SI, preparation work; s2, replacing a machine head end bracket; s3, replacing a transition bracket; s4, withdrawing the bracket and carrying out subsequent operation; according to the support withdrawing process, the support with the small size and the light weight is used for replacing an original machine head and machine tail end and a transition support, the difficulty and the operation risk in the support withdrawing and closing-up process are effectively reduced, and the situation that the support is pressed tightly is avoided; by means of the technology, the risk of retracting and closing-up operation of the support can be reduced to the maximum extent, meanwhile, the difficulty is reduced to the minimum, the retracting speed of the hydraulic support is increased, the support is not pressed tightly in the support retracting period, the retracting period can be shortened, and the production cost is reduced; in the withdrawing process, the safety and the stability in the withdrawing process can be ensured through a reasonable support replacement sequence, interlocking wood cribs are erected and round wood supporting columns are erected.

The utility model aims to disclose a mining single-armed drill carriage, which relates to the technical field of coal mine tunnel drill carriages and comprises a chassis, an anchor protection component and a power part, the anchor protection assembly is arranged at the front end of the chassis, and the power part is arranged behind the anchor protection assembly; the power part comprises a fixed plate, an explosion-proof diesel engine, a diesel oil tank, a water replenishing tank, a water washing tank, an air filter, a wireless remote control receiver, a hydraulic pump and a hydraulic oil tank; the explosion-proof diesel engine and the water washing tank are both arranged at the rear end of the fixing plate, the hydraulic pump and the hydraulic oil tank are both arranged at the front end of the fixing plate, and a smoke exhaust port of a smoke exhaust pipe of the explosion-proof diesel engine is formed in the top of the water washing tank. The device can flexibly adapt to narrow roadways; the explosion-proof diesel engine, the diesel oil tank, the water replenishing tank, the water washing tank, the hydraulic pump, the hydraulic oil tank and the like are compactly arranged, so that the power of the drill carriage is ensured under the condition of a narrow carriage body.

An automatic support device for resisting rock burst in mines is provided, which includes bases symmetrically distributed, sliding frames are slidably connected to the bases, hydraulic rods are fixedly connected to the bases, and telescopic ends of the hydraulic rods are fixedly connected to the adjacent sliding frames. The sliding frames are fixedly connected to brackets, and the brackets symmetrically distributed are provided with a main support plate, on which pushing rods are provided. The device can slow down the impact force of the device when rock burst occurs in the mine, at the same time, it plays a supporting role in the mine, ensuring the stability of the roof of the mine.

A jacking system is used for excavation construction of cross passage. The jacking system includes a reaction frame and force transmission member which connects the reaction frame with main tunnel segment(s) surrounding a starting end of the cross passage. The reaction frame is used to provide support for excavation apparatus along an excavation direction. Support force is transmitted to the main tunnel segment(s) surrounding the starting end of the cross passage via the force transmission member. Back support is cancelled from the jacking system and the structure and whole system are more simplified and intensive. In addition, the space behind the reaction frame is no longer occupied, which makes it possible to construct main tunnel and cross passages or multiple cross passages simultaneously. This jacking system not only has low manufacturing cost, but also reduces construction cost due to simplified operation, construction space saving and simultaneous construction procedures.

The utility model relates to the field of roadway or tunnel supporting, and discloses a reinforced passive supporting structure based on U-shaped steel supports, which comprises a plurality of U-shaped steel supports arranged in a roadway at intervals, supporting plates extending out of two sides of the supports are welded on the bottom surfaces of arc-shaped sections of the U-shaped steel supports, and at least one connecting cross beam is further arranged between every two adjacent U-shaped steel supports; a yielding type supporting and jacking assembly is further arranged between every two adjacent U-shaped steel supports and comprises an arc-shaped top plate, supporting columns, an arch-shaped elastic plate and a side extrusion plate, the arc-shaped top plate is arranged above the bearing plate and connected with the arch-shaped elastic plate arranged below the bearing plate through the multiple supporting columns, multiple connecting rods are arranged on the two sides of the arch-shaped elastic plate, and the side extrusion plate is connected with the arc-shaped top plate through the multiple connecting rods. The connecting rods penetrate through the cross beams and are connected with the side extrusion plates, and the arc-shaped top plates and the side extrusion plates jointly support the tunnel vault between the U-shaped steel supports. The yielding type supporting and jacking assembly is arranged between the U-shaped steel supports, so that the supporting reliability between the U-shaped steel supports is guaranteed.

The invention discloses a coal mine deep high-stress roof stabilizing device based on a truss collaborative structure. The coal mine deep high-stress roof stabilizing device comprises a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism. The supporting modules are detachably and fixedly connected through a splicing structure, the lifting supporting mechanism is installed at the tops of the supporting modules and used for driving the supporting components to abut against a coal mine roof, the buffering mechanism is connected with the supporting components, and the flow guide filtering mechanism is arranged on the side portions of the supporting modules and used for receiving and treating roof seepage water. The invention discloses a roof stabilizing device suitable for a deep high-stress environment of a coal mine, the roof stabilizing device is composed of a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism, and through the design of convenient splicing locking, flexible buffering supporting and efficient flow guide filtering, the stability, operation efficiency and safety of roof supporting are improved.

The invention belongs to the technical field of mine pressure of underground mining of coal mines, and particularly relates to a working face roof weighting identification method based on the state of a hydraulic support safety valve. Comprising the steps of collecting working resistance data of all hydraulic supports in a working face in real time, and drawing a broken line graph with time T as a horizontal coordinate and working resistance P as a vertical coordinate; the hydraulic support safety valve opening point is determined according to the slope and the relation between the working resistance and the safety valve opening threshold value, the hydraulic support safety valve closing point is determined according to the slope and the relation between the working resistance and the safety valve opening threshold value, safety valve opening and closing occur in pairs, and the safety valve opening frequency and each opening time are recorded; the roof weighting strength at each hydraulic support is determined based on the two dimensions of the safety valve opening frequency and the accumulated opening duration, the working face weighting grade in one mining step pitch is determined based on the safety valve opening proportion m of the hydraulic supports, the coal face safety production can be guided in time, and the rock burst danger is avoided.

The invention relates to the technical field of coal mine hydraulic control, in particular to a water-based proportional valve and a hydraulic support system.The water-based proportional valve comprises a valve sleeve, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, the liquid inlet assembly comprises a liquid inlet valve element and a main spring, and the elastic force of the main spring acts on the liquid inlet valve element, so that the P port and the A port are disconnected; the liquid return assembly comprises a liquid return valve element, a pilot control cavity connected with the opening K is formed between the liquid return valve element and the plug, and when high-pressure liquid is injected into the pilot control cavity through the opening K, the liquid return valve element can be pushed to move towards the liquid inlet valve element; when the liquid return valve core is far away from the liquid inlet valve core, the T port is communicated with the A port through the liquid inlet valve core; when the liquid return valve element makes contact with the liquid inlet valve element, the T opening and the A opening are disconnected. And when the liquid return valve core pushes the liquid inlet valve core to move, the P port is communicated with the A port. The scheme is used for simplifying hydraulic valve element control, reducing system complexity and improving reliability and response speed.

The utility model discloses a temporary supporting device for coal mine excavation, and particularly relates to the technical field of coal mine excavation supporting, which comprises two arch-shaped supporting frames, supporting rods are arranged on two sides of the bottom of each arch-shaped supporting frame, and a splitting mechanism for conveniently taking down the arch-shaped supporting frames from the supporting rods is arranged at the bottoms of the arch-shaped supporting frames. The splitting mechanism comprises two limiting rods arranged at the bottom of the arch-shaped supporting frame, first threaded holes are formed in the limiting rods, second threaded holes are formed in the top ends of the supporting rods, and the interiors of the first threaded holes and the second threaded holes which are communicated are in threaded connection with the same first bolt. The arch-shaped supporting frames and the supporting rods can be split into two small parts through the splitting mechanism, the overall size is small, occupied space is small, passing in a coal mine is easy, the distance between the two arch-shaped supporting frames can be adjusted through the supporting mechanism, the supporting device is suitable for coal mines with different widths, and the supporting device is convenient to use. And the application range of the device is expanded.

The embodiment of the utility model provides an active protection structure and a construction trolley, and relates to the field of tunnel construction. The active protection structure comprises a support and telescopic supporting legs. The telescopic supporting leg is rotatably connected to the support and used for abutting against the surrounding rock. In the tunnel construction process, the supports are used for supporting the telescopic supporting legs, the telescopic supporting legs abut against the surrounding rock to play an active protection role, the collapse probability of the surrounding rock can be reduced, casualties of workers are avoided, and therefore potential safety hazards are reduced. The construction trolley comprises a rack type trolley body and the active protection structure, the support is installed on the rack type trolley body, and the construction trolley has all functions of the active protection structure.

The present invention relates to a hydraulic support follow-up self-compensation coal discharge laser scanning device and method, which is suitable for use in coal mines. It includes an inclination sensor, a power box, a laser scanning device, an industrial computer, a display, and a chute main control computer, wherein the laser scanning device is provided with a laser radar, a stepper motor driver, a stepper motor, and an inclination sensor b, the power box is connected to the laser scanning device, the industrial computer, and the display to provide power for them, and the industrial computer is respectively connected to the display, the laser scanning device, and the inclination sensor a line. It can obtain coal quantity characteristics from the collected laser point cloud data, establish a digital terrain model in combination with the speed of the scraper conveyor for grid division, obtain the coal flow volume, and provide data support for the closing of the coal discharge port. At the same time, based on the posture transformation characteristics of the hydraulic support and the angle change of the rear connecting rod of the hydraulic support, the laser scanning device is adjusted for angle self-compensation, so as to achieve uninterrupted and precise coal quantity measurement without manual intervention.

The utility model relates to the technical field of coal mining, in particular to a coal mining roadway supporting device which comprises a supporting plate and a sliding assembly, the sliding assembly comprises two sliding plates, two protruding blocks, four first fixing plates, four second fixing plates, a threaded rod, two pushing rods and a sleeve, and the two sliding plates are connected with the supporting plate in a sliding mode. The two protruding blocks are fixedly connected with the corresponding sliding plates respectively, the four first fixing plates are fixedly connected with the corresponding protruding blocks respectively, the threaded rod is rotationally connected with the supporting plate, the sleeve is in threaded connection with the threaded rod and arranged on the surface of the threaded rod in a sleeving mode, and the four second fixing plates are fixedly connected with the sleeve. The two pushing rods are rotationally connected with the corresponding first fixing plates and the corresponding second fixing plates correspondingly, and through the arrangement of the structure, the problem that the supporting effect on the top wall of a coal mining roadway is insufficient due to the fact that the size of a top plate of a roadway supporting device cannot be adjusted is solved.

Provided in the present disclosure are a support unit and a support assembly. The support unit comprises: bases, a supporting rod and mounting members; the bases are used for being installed on the ground; the supporting rod comprises connection segments and a supporting segment which are sequentially connected, the connection segments being detachably connected to the bases; the supporting segment bulges in a direction away from the bases so as to be used for being in contact with the roof of a tunnel; the mounting members being connected to the supporting segment and being used for fixing a mesh onto the supporting rod, so as to lay the mesh along the peripheral contour of the supporting rod; multiple mounting members are provided, and the multiple mounting members are arranged at intervals in an extension direction of the supporting segment.

The utility model discloses a mining single prop shoe which comprises a prop shoe body plate, an outer cover is arranged at the top end of the exterior of the prop shoe body plate, a connecting ring is arranged at the top end of the prop shoe body plate, a reinforcing frame is fixed to the bottom end of the exterior of the connecting ring, and a connector is fixed to the bottom end of the connecting ring. And a connecting groove is formed in the top end of the column shoe main body plate. When the mining single prop shoe is used through the prop shoe, the connecting head fixed at the bottom end of the connecting ring can be correspondingly screwed into the connecting groove in the top end of the prop shoe main body plate to be screwed tightly, then the connecting ring can be installed and fixed at the top end of the prop shoe main body plate, and the arranged connecting ring and the prop shoe main body plate are installed and connected through the connecting groove and the connecting head; the detachable structure facilitates independent disassembly and replacement of the damaged assembly after the support column shoe assembly is damaged, the use cost of the column shoe is saved, and the problem that the support column shoe assembly is inconvenient to disassemble and replace is solved.

A non-uniform-strength supporting control method in a cutting process, comprising a data acquisition system and a postprocessing system. The postprocessing system comprises a data processing system, a result determination system, a comprehensive analysis system, and an output and storage system; and the supporting force of each hydraulic support can be adjusted in real time, to adapt to supporting force changes caused by advancement of the hydraulic supports. By comprehensively considering the mechanical properties of coal rock and the supporting requirements in the advancement process, the method uses an advanced control algorithm and a real-time data feedback mechanism to effectively solve the technical problem that in the advancement process, insufficient supporting force of the hydraulic supports leads to an instable mine pressure.