CN112240222A - Retractable colliery is tunnel waste filling machine for pit - Google Patents
Retractable colliery is tunnel waste filling machine for pit Download PDFInfo
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- CN112240222A CN112240222A CN202011234563.9A CN202011234563A CN112240222A CN 112240222 A CN112240222 A CN 112240222A CN 202011234563 A CN202011234563 A CN 202011234563A CN 112240222 A CN112240222 A CN 112240222A
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- 239000002699 waste material Substances 0.000 title claims description 7
- 239000010878 waste rock Substances 0.000 claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 34
- 230000000903 blocking effect Effects 0.000 claims description 25
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 238000005429 filling process Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
- E21F15/10—Hydraulic or pneumatic filling-up machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention belongs to the technical field of coal mining, and particularly relates to a telescopic type underground coal mine roadway gangue filling machine. The anti-deviation problem that the discharge device is connected with the main belt of the belt conveyor when the unit works and the unit retreats is solved. The technical scheme is as follows: a retractable roadway waste rock filling machine for underground coal mines comprises a walking part, a machine body part, a waste rock throwing device, a discharging device, a rear supporting part, an electrical system and a hydraulic system; the walking part is arranged on the left side and the right side of the lower portion of the machine body part, the gangue throwing device is arranged in the middle of the machine body part, the discharging device is arranged at the rear end of the machine body part, the rear supporting part is arranged on the left side and the right side of the lower portion of the discharging device, the electrical system is arranged on the right rear side of the machine body part, and the hydraulic system is arranged on the right front side of the machine body part. The invention effectively solves the problems of excessive times of the unit engine in the filling process and frequent disassembly of the middle frame of the belt conveyor when the unit retreats.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a telescopic type underground coal mine roadway gangue filling machine integrating multiple functions of walking, unloading, gangue throwing, compacting and the like.
Background
The coal gangue is a solid waste generated in the coal mining and processing processes, and is generally transported to the ground underground for accumulation and storage, so that a coal gangue dump is formed in a long time, the coal gangue dump not only occupies a large amount of land resources, but also generates gas components to pollute and destroy the surrounding ecological environment, so that the research on gangue backfilling equipment becomes necessary, but the traditional gangue filling machine has a simple structure and a single function, a gangue throwing device is not telescopic, a machine set needs to be frequently moved in the gangue throwing and filling process, the operability is poor, the filling rate is low, and the labor intensity and the potential safety hazard are greatly increased.
Disclosure of Invention
The invention aims to provide a telescopic type underground coal mine roadway gangue filling machine, which effectively solves the problems that the number of times of a machine set motor is too large in the filling process and the intermediate frame of a belt conveyor is frequently disassembled when the machine set retreats.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a retractable roadway waste rock filling machine for underground coal mines comprises a walking part, a machine body part, a waste rock throwing device, a discharging device, a rear supporting part, an electrical system and a hydraulic system; the walking part is arranged on the left side and the right side of the lower portion of the machine body part, the gangue throwing device is arranged in the middle of the machine body part, the discharging device is arranged at the rear end of the machine body part, the rear supporting part is arranged on the left side and the right side of the lower portion of the discharging device, the electrical system is arranged on the right rear side of the machine body part, and the hydraulic system is arranged on the right front side of the machine body part.
The walking part consists of a crawler frame, two bend chain wheels, two driving chain wheels, two crawler belts, two tensioning devices, a speed reducer and a walking hydraulic motor; the crawler belt comprises two bend sprockets, two driving sprockets, two crawler belts, two tensioning devices, a speed reducer, a traveling hydraulic motor and a speed reducer, wherein the two bend sprockets are symmetrically arranged on the left side and the right side of the front end of a crawler belt frame, the two driving sprockets are symmetrically arranged on the left side and the right side of the rear end of the crawler belt frame, the two crawler belts are respectively wound between the bend sprockets on the left side and the right side and the driving sprockets, the two tensioning devices are arranged on the left side and the right side of the crawler belt frame and located behind the bend sprockets, the speed reducer is arranged in an inner cavity of the driving sprockets, a shell of the speed reducer is connected with the driving sprockets to drive the.
The machine body part consists of a shovel plate, a shovel plate oil cylinder, a frame, a rotary platform, a single-row crossed roller type rotary bearing, a rotary oil cylinder, a left platform and a right platform; the shovel plate oil cylinder is hinged with a connecting lug at the upper part of the front end of the frame, the telescopic rod of the shovel plate oil cylinder is hinged with a connecting seat of the shovel plate, the cylinder body of the shovel plate oil cylinder is hinged with the connecting lug at the upper part of the front end of the frame, the shovel plate is driven by the telescopic rod of the shovel plate oil cylinder to lift and fall, and the shovel plate can be compacted by the shovel plate by matching with the walking part; the rotary platform is arranged on a single-row crossed roller type rotary bearing, one end of the single-row crossed roller type rotary bearing is fixedly connected with the rotary platform, the other end of the single-row crossed roller type rotary bearing is fixedly connected with the rack, the number of the rotary oil cylinders is two, the rotary oil cylinders are symmetrically arranged in a left-right mode, a telescopic rod of each oil cylinder is hinged to an oil cylinder fixing seat at the rear end of the rotary platform, a cylinder body of each oil cylinder is hinged to a connecting lug at the rear end of the rack, and the rotary oil cylinders move in a telescopic mode to drive the rotary platform, a left platform and; the left platform is fixed on the upper portion of the left side of the rotary platform, the right platform is fixed on the upper portion of the right side of the rotary platform, and the left platform and the right platform can rotate left and right along with the rotary platform.
The waste rock throwing device consists of a support frame, a roller, a buffer carrier roller, a belt, a V-shaped belt cleaner, a flat carrier roller, a coal blocking frame I, a coal blocking frame II, a coal blocking frame III, a driving device, a slideway, a support frame supporting oil cylinder, a straight belt cleaner, a gear device, a telescopic device, a sliding device and a guide wheel; the rear end connecting lug of the support frame is hinged with the connecting lug on the rotary platform, the roller is arranged at the front end of the support frame, the driving device is arranged at the rear end of the support frame, the belt is respectively wound between the roller and the driving device, and the driving device drives the belt to run, so that the gangue conveying effect is realized; the buffer carrier roller and the flat carrier roller are respectively arranged in the corresponding carrier roller mounting grooves of the support frame, and play roles in buffering and supporting a belt; the coal blocking frame I and the coal blocking frame II are arranged above the front part of the support frame, the coal blocking frame III is arranged above the rear part of the support frame and is designed in a V-shaped structure, the slideways are arranged in bilateral symmetry and are fixedly connected with the support frame and are arranged on the inner end surfaces of the two sides of the support frame, the gear device is arranged at the left front side of the support frame, the telescopic device is arranged at the inner side position below the support frame, a gear of the gear device is meshed with a rack of the telescopic device, the gear device runs to drive the telescopic device to realize the front-back telescopic effect, the sliding device is arranged at the right front side position of the support frame, the sliding device plays a limiting and guiding effect on the telescopic device, and the sliding device is matched; the V-shaped belt cleaner and the straight belt cleaner are arranged at corresponding positions of the waste rock throwing device, and materials adhered to the surface of the belt are cleaned through friction of the V-shaped belt cleaner and the straight belt cleaner and the belt, so that a belt cleaning effect is realized; the leading wheel is installed in support frame bottom front side position, plays the guide effect to the telescoping device, the support frame supports the hydro-cylinder totally two, divides left right symmetrical arrangement, and its telescopic link is articulated with the engaging lug of support frame middle part both sides respectively, and its cylinder body is articulated with the fixing base of left platform, right platform front end respectively, and support frame support hydro-cylinder telescopic link is flexible to drive whole throwing cash device and is realized whole lift.
The expansion device consists of an expansion bracket, a waste rock throwing driving device, a throwing belt, a waste rock throwing buffer carrier roller, a waste rock throwing flat carrier roller, a waste rock throwing roller, a sliding bracket guide wheel and a rack; the expansion bracket is arranged in the support frame, the waste rock throwing driving device is arranged at the front end of the expansion bracket, the waste rock throwing roller is arranged at the rear part of the expansion bracket, the throwing belts are respectively wound between the waste rock throwing driving device and the waste rock throwing roller, and the waste rock throwing driving device drives the throwing belts to operate; the waste rock throwing buffer carrier roller is arranged in a carrier roller mounting groove at the upper part of the telescopic frame, can buffer the impact of the fallen waste rock on the throwing belt and plays a role of supporting the throwing belt; the sliding frame is provided with four guide wheels which are symmetrically arranged on the two sides of the rear part of the telescopic frame in a left-right mode, and when the telescopic device is stretched, the guide wheels roll along the slide way; the rack is fixed on the left side surface of the telescopic frame, the tooth surface of the rack is meshed with the gear tooth surface of the gear device, and the rack is driven to realize the linear telescopic motion of the telescopic device when the gear device rotates.
The discharging device consists of a rear supporting seat, an offset oil cylinder, an offset platform, a supporting seat, an adjusting oil cylinder, an offset frame, a belt frame and a cable winding device; the front end of the rear supporting seat is fixedly connected with the rear end of the frame, the deviation adjusting oil cylinders are divided into two parts which are symmetrically arranged left and right, the cylinder bodies of the deviation adjusting oil cylinders are hinged with the connecting lugs on the two sides of the rear supporting seat, the telescopic rods of the deviation adjusting oil cylinders are hinged with the connecting lugs at the bottom of the deviation adjusting platform, and the telescopic rods of the deviation adjusting oil cylinders stretch to drive the deviation adjusting platform to adjust left and right small angles, so that the left and right small-angle leveling of; the bottom of the supporting seat is fixedly connected with the deviation adjusting platform, a connecting lug at the upper part of the supporting seat is hinged with a connecting lug at the bottom of the deviation adjusting frame, a cylinder body of the adjusting oil cylinder is hinged with a connecting lug at the rear end of the deviation adjusting platform, a telescopic rod of the adjusting oil cylinder is hinged with the connecting lug at the rear end of the bottom of the deviation adjusting frame, and the telescopic rod of the adjusting oil cylinder stretches to drive the discharging device to lift, so that the small-angle adjustment of the discharging device from; the front end connecting lug of the belt frame is hinged with the deviation adjusting frame, and the cable rolling device is installed on the left side face of the belt frame.
The belt frame consists of a belt frame body, a hopper, a protective cover, an unloading roller, a coal blocking frame, an unloading belt, an unloading buffer carrier roller, an unloading flat carrier roller and a bend carrier roller; the front end of the belt frame body is hinged with the deviation adjusting frame and can swing left and right by a certain angle, the funnel is arranged at the bottom of the front end of the belt frame body, so that gangue can fall into the gangue throwing device conveniently, and the shield is arranged at the upper part of the front end of the belt frame body; the unloading roller is installed at the front end of the belt frame body, the unloading buffer carrier roller is installed on a carrier roller frame at the upper part of the belt frame body, the unloading flat carrier roller is installed on a carrier roller frame at the bottom of the belt frame body, the bend carrier roller is installed at the rear end of the belt frame body, the unloading belt is respectively wound between the unloading roller and a roller of the belt conveyor through the buffer carrier roller and the unloading flat carrier roller, gangue is conveyed to the unloading roller through the unloading belt, then the unloading belt enters a gangue throwing device, the coal blocking frames are arranged together, and are symmetrically installed on the upper part of the belt frame body, and the two side positions of the rear end.
The rear supporting part consists of a rear supporting oil cylinder, a rear supporting leg and a lower top plate; the telescopic link of back support cylinder is articulated with the middle part of back support leg, the cylinder body of back support cylinder is articulated with the engaging lug on back supporting seat upper portion, back support leg totally two, divides left and right symmetrical arrangement, and its one end is articulated on the back supporting seat, and the other end is articulated with roof down, and the action of going up and down is carried out to back support leg and roof down through the flexible drive of back support cylinder telescopic link.
The telescopic roadway waste rock filling machine for the underground coal mine adopts the technical scheme, and integrates the functions of telescoping, walking, unloading, waste rock throwing, compacting and the like; the large-stroke telescopic belt frame configured by the unit converts the rotary motion of the gear into the linear motion of the belt frame by matching the gear of the gear device with the long rack arranged on the side surface of the belt frame, realizes the function of large stroke telescopic front and back of the belt frame, and can greatly reduce the frequency of moving machines and the frequency of disassembling the intermediate frame of the belt conveyor when the unit is withdrawn; the throwing device can swing up, down, left and right within a certain angle range, and the unloading device matched with the deviation prevention is connected with the conveyor through the belt, so that gangue can be thrown to a roadway smoothly, and the optimal filling effect is achieved; meanwhile, the push plate is arranged at the front part of the machine set, so that the backfilled gangue can be pushed and tamped, and the filling rate is improved; the rear part of the machine set is provided with a rear support, so that the machine body can be stabilized, and the machine body is superior to the existing gangue filling machine for the underground coal mine roadway in terms of economy, safety and functionality.
Compared with the prior art, the telescopic underground coal mine roadway gangue filling machine has the following advantages:
1. the belt rack telescopic sliding device adopts a large-stroke telescopic belt rack structure, utilizes the gears and the long racks arranged on the side surfaces of the belt rack to carry out transmission, has the advantages of high meshing degree, good guidance quality, long stroke distance and the like, and ensures the lightness and the stability of the telescopic sliding of the belt rack and improves the sliding efficiency by matching the guide wheels arranged on the bottom surface of the waste rock throwing device and the guide wheels arranged on the two sides of the rear end of the belt rack.
2. The invention adopts a three-stage waste rock conveying mode, the tail part of the discharging device is connected with the belt conveyor to form primary transportation, the waste rock throwing device and the discharging device are overlapped in front and back to form secondary transportation, the waste rock throwing device and the built-in large-stroke telescopic belt frame form the three-stage transportation, the discharging device in the primary transportation adopts an anti-deviation structure to realize a series of actions such as leveling, deviation adjustment, inclination adjustment and the like of the discharging roller, so that the smooth operation of the belt conveyor is ensured, the waste rock throwing device can rotate left and right at a small angle and lift up and down in the secondary transportation, the good overlapping between the devices is ensured, the telescopic belt frame is adopted in the three-stage transportation, the telescopic sliding is flexible and stable, the waste rock can be timely and effectively filled into a roadway by the three-stage conveying mode.
3. The invention adopts a crawler type walking mode, the advancing, retreating, braking and steering of the unit are flexible and convenient, and the invention can adapt to roadways with various complex working conditions.
4. The front part of the invention is provided with the push plate, which can push and tamp the backfilled gangue in time and improve the filling rate.
5. The rear part of the invention is provided with a rear support, so that the unit can keep stable in the working process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of the structure of the walking part in FIG. 1;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of the body portion of FIG. 1;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a schematic structural diagram of the gangue dumping device in FIG. 1;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a schematic view of the structure of the retractor of FIG. 7;
FIG. 10 is a top view of FIG. 9;
FIG. 11 is a schematic view of the discharge apparatus of FIG. 1;
FIG. 12 is a top view of FIG. 11;
FIG. 13 is a view from direction K of FIG. 11;
fig. 14 is a schematic view of the structure of the belt holder of fig. 11;
fig. 15 is a schematic view of the rear support part in fig. 1.
Detailed Description
As shown in fig. 1 to 2, the retractable type roadway gangue filling machine for the underground coal mine of the embodiment comprises a walking part 1, a machine body part 2, a gangue throwing device 3, a discharging device 4, a rear supporting part 5, an electrical system 6 and a hydraulic system 7; the walking part 1 is arranged on the left side and the right side below the machine body part 2, the gangue throwing device 3 is arranged in the middle of the machine body part 2, the discharging device 4 is arranged at the rear end of the machine body part 2, the rear supporting part 5 is arranged on the left side and the right side below the discharging device 4, the electrical system 6 is arranged on the right rear side of the machine body part 2, and the hydraulic system 7 is arranged on the right front side of the machine body part 2.
As shown in fig. 3 to 4, the walking part 1 is composed of a track frame 1-1, two direction-changing sprockets 1-2, two driving sprockets 1-3, two tracks 1-4, two tensioning devices 1-5, a speed reducer 1-6 and a walking hydraulic motor 1-7; the two direction-changing sprockets 1-2 are symmetrically arranged on the left side and the right side of the front end of the crawler frame 1-1, the two driving sprockets 1-3 are symmetrically arranged on the left side and the right side of the rear end of the crawler frame 1-1, the two crawler belts 1-4 are respectively wound between the left side direction-changing sprockets 1-2 and the driving sprockets 1-3, the two tensioning devices 1-5 are arranged on the left side and the right side of the crawler frame 1-1 and are positioned behind the direction-changing sprockets 1-2, the speed reducer 1-6 is arranged in an inner cavity of the driving sprockets 1-3, a shell of the speed reducer 1-6 is connected with the driving sprockets 1-3 to drive the driving sprockets 1-3 to rotate through rotation of the shell of the speed reducer 1-6, the traveling hydraulic motor 1-7 is arranged on the speed reducer 1-6, and an output shaft of the traveling hydraulic motor 1-7 is connected with an input -6 providing rotational drive.
As shown in fig. 5 to 6, the body part 2 is composed of a shovel plate 2-1, a shovel plate cylinder 2-2, a frame 2-3, a rotary platform 2-4, a single-row cross roller type rotary bearing 2-5, a rotary cylinder 2-6, a left platform 2-7 and a right platform 2-8; the frame 2-3 is arranged above the walking part 1 and fixedly connected with the crawler frame 1-1, one end of the shovel plate 2-1 is hinged with a connecting lug at the bottom of the front end of the frame 2-3, the other end of the shovel plate is hinged with a telescopic rod of the shovel plate oil cylinder 2-2, the telescopic rod of the shovel plate oil cylinder 2-2 is hinged with a connecting seat of the shovel plate 2-1, a cylinder body of the shovel plate oil cylinder 2-2 is hinged with the connecting lug at the upper part of the front end of the frame 2-3, the telescopic motion of the telescopic rod of the shovel plate oil cylinder 2-2 drives the shovel plate 2-1 to realize lifting and falling actions, the compaction action of the shovel plate on waste rocks can be realized by matching with the walking part 1, meanwhile, the waste rocks can be prevented from being accumulated or falling to; the rotary platform 2-4 is arranged on a single-row cross roller type rotary bearing 2-5, one end of the single-row cross roller type rotary bearing 2-5 is fixedly connected with the rotary platform 2-4, the other end of the single-row cross roller type rotary bearing is fixedly connected with a rack 2-3, the number of the rotary oil cylinders 2-6 is two, the rotary oil cylinders are symmetrically arranged in left and right directions, a telescopic rod of each oil cylinder is hinged with an oil cylinder fixing seat at the rear end of the rotary platform 2-4, a cylinder body of each oil cylinder is hinged with a connecting lug at the rear end of the rack 2-3, and the rotary oil cylinders 2-6 move in a telescopic mode to drive the rotary platform 2-4, a left platform 2-7 and a right platform 2-8 which are arranged on the rotary platform to rotate; the left platform 2-7 is fixed on the upper portion of the left side of the rotary platform 2-4, the right platform 2-8 is fixed on the upper portion of the right side of the rotary platform 2-4, and the left platform 2-7 and the right platform 2-8 can rotate left and right along with the rotary platform 2-4.
As shown in fig. 7 to 8, the waste rock throwing device 3 is composed of a support frame 3-1, a roller 3-2, a buffer roller 3-3, a belt 3-4, a 'V' -shaped belt cleaner 3-5, a flat roller 3-6, a coal blocking frame I3-7, a coal blocking frame II 3-8, a coal blocking frame III 3-9, a driving device 3-10, a slideway 3-11, a support frame support oil cylinder 3-12, a 'straight' belt cleaner 3-13, a gear device 3-14, a telescopic device 3-15, a sliding device 3-16 and a guide wheel 3-17; the rear end connecting lug of the support frame 3-1 is hinged with the connecting lug on the rotary platform 2-4, the roller 3-2 is arranged at the front end of the support frame 3-1, the driving device 3-10 is arranged at the rear end of the support frame 3-1, the belt 3-4 is respectively wound between the roller 3-2 and the driving device 3-10, and the driving device 3-10 drives the belt 3-4 to run at a certain speed, so that the gangue conveying effect is realized; the buffer carrier rollers 3-3 and the flat carrier rollers 3-6 are respectively arranged in corresponding carrier roller mounting grooves of the support frame 3-1, and play roles in buffering and supporting the belt 3-4; the coal blocking frame I3-7 and the coal blocking frame II 3-8 are arranged above the front portion of the supporting frame 3-1, are of a combined structure of a square rigid frame and a diamond net, and are properly heightened to increase the height of a coal blocking plate, so that the waste rock is effectively prevented from falling off and sliding out, the coal blocking frame III 3-9 is arranged above the rear portion of the supporting frame 3-1, is of a V-shaped structural design, increases the material collecting area, can adapt to larger angle material collection when the waste rock throwing device 3 swings left and right, is not easy to fall off, and increases the adaptability and flexibility of the whole machine. The slideways 3-11 are arranged in bilateral symmetry, are fixedly connected with the support frame 3-1 and are arranged on the inner end surfaces of two sides of the support frame 3-1, the gear device 3-14 is arranged at the front left side of the support frame 3-1, the telescopic device 3-15 is arranged at the inner side position below the support frame 3-1, the gear of the gear device 3-14 is meshed with the rack 3-15-8 of the telescopic device 3-15, the gear device 3-14 operates to drive the telescopic device 3-15 to realize the front-back telescopic action, in the gangue throwing process, the tunnel is continuously filled with the gangue along with the gangue throwing process, the telescopic device 3-15 is required to retreat for a certain distance to be filled again after a certain distance is filled, the machine set is not required to be frequently started, the times of motive power and the frequency of disassembling the middle frame of the belt conveyor when the machine set retreats are greatly reduced, the sliding device 3-16 is arranged at the right front side of the support frame 3-1, the sliding device 3-16 can play a limiting and guiding role on the telescopic device 3-15, and the sliding device is matched with the gear device 3-14 to ensure that the telescopic device 3-15 realizes the telescopic function along the linear direction; the V-shaped belt cleaning device 3-5 and the straight belt cleaning device 3-13 are arranged at corresponding positions of the waste rock throwing device 3, and materials adhered to the surface of the belt are cleaned through friction of the V-shaped belt cleaning device 3-5, the straight belt cleaning device 3-13 and the belt 3-4, so that a belt cleaning effect is realized, belt congestion and damage caused by adhesion of the materials are avoided, and smooth waste rock throwing is ensured; the guide wheels 3-17 are arranged at the front side position of the bottom of the support frame 3-1, can guide the expansion devices 3-15, and can reduce the running resistance of the expansion devices 3-15; the support frame support oil cylinders 3-12 are symmetrically arranged left and right, telescopic rods of the support frame support oil cylinders are hinged to connecting lugs on two sides of the middle of the support frame 3-1, cylinder bodies of the support frame support oil cylinders are hinged to fixing seats at the front ends of the left platform 2-7 and the right platform 2-8, the telescopic rods of the support frame support oil cylinders 3-12 stretch to drive the whole waste rock throwing device 3 to achieve the integral lifting function, the requirement of a unit for achieving waste rock throwing at a certain height can be met, and the roadway filling rate is improved.
As shown in fig. 9 to 10, the expansion device 3-15 comprises an expansion bracket 3-15-1, a gangue throwing driving device 3-15-2, a throwing belt 3-15-3, a gangue throwing buffer roller 3-15-4, a gangue throwing leveling roller 3-15-5, a gangue throwing roller 3-15-6, a sliding bracket guide wheel 3-15-7 and a rack 3-15-8; the expansion bracket 3-15-1 is arranged in the support frame 3-1, the gangue throwing driving device 3-15-2 is arranged at the front end of the expansion bracket 3-15-1, the gangue throwing roller 3-15-6 is arranged at the rear part of the expansion bracket 3-15-1, the throwing belt 3-15-3 is respectively wound between the gangue throwing driving device 3-15-2 and the gangue throwing roller 3-15-6, the gangue throwing driving device 3-15-2 drives the throwing belt 3-15-3 to operate, and gangue is conveyed to the head-on position of a roadway and thrown out, so that the gangue throwing function is realized; the throwing waste rock buffer carrier roller 3-15-4 is arranged in a carrier roller mounting groove at the upper part of the telescopic frame 3-15-1, can buffer the impact of the fallen waste rock on the throwing belt 3-15-3 and plays a role in supporting the throwing belt 3-15-3, the throwing waste rock flat carrier roller 3-15-5 is arranged in a carrier roller mounting groove at the lower part of the telescopic frame 3-15-1 and plays a role in supporting the throwing belt 3-15-3, the running resistance of the throwing belt 3-15-3 is reduced, and the stable running of the throwing belt 3-15-3 is ensured; the four sliding frame guide wheels 3-15-7 are symmetrically arranged on the two sides of the rear part of the telescopic frame 3-15-1 in a left-right mode, and when the telescopic device 3-15 is telescopic, the guide wheels 3-15-7 roll along the slide ways 3-11, so that the running resistance is reduced; the rack 3-15-8 is fixed on the left side surface of the telescopic frame 3-15-1, the tooth surface of the rack is meshed with the gear tooth surface of the gear device 3-14, and the rack 3-15-8 is driven to realize the linear telescopic motion of the telescopic device 3-15 when the gear device 3-14 rotates.
As shown in fig. 11 to 13, the discharging device 4 is composed of a rear supporting seat 4-1, an offset adjusting oil cylinder 4-2, an offset adjusting platform 4-3, a supporting seat 4-4, an adjusting oil cylinder 4-5, an offset adjusting frame 4-6, a belt frame 4-7 and a cable winding device 4-8; the front end of the rear supporting seat 4-1 is fixedly connected with the rear end of the frame 2-3, the deviation adjusting cylinders 4-2 are symmetrically arranged left and right, the cylinder bodies of the deviation adjusting cylinders are hinged with the connecting lugs on the two sides of the rear supporting seat 4-1, the telescopic rods of the deviation adjusting cylinders are hinged with the connecting lugs at the bottom of the deviation adjusting platform 4-3, the telescopic rods of the deviation adjusting cylinders 4-2 stretch to drive the deviation adjusting platform 4-3 to adjust left and right small angles, and the left and right small-angle leveling of the discharging device 4 is realized; the bottom of the supporting seat 4-4 is fixedly connected with the deviation adjusting platform 4-3, a connecting lug at the upper part of the supporting seat 4-4 is hinged with a connecting lug at the bottom of the deviation adjusting frame 4-6, a cylinder body of the adjusting oil cylinder 4-5 is hinged with a connecting lug at the rear end of the deviation adjusting platform 4-3, a telescopic rod of the adjusting oil cylinder 4-5 is hinged with the connecting lug at the rear end of the bottom of the deviation adjusting frame 4-6, and the telescopic rod of the adjusting oil cylinder 4-5 stretches to drive the discharging device 4 to lift, so that the small-angle adjustment of the discharging device 4 in the; the front end connecting lug of the belt frame 4-7 is hinged with the deviation adjusting frame 4-6, and can swing left and right for a certain angle, so that the belt frame can be conveniently connected with other equipment; the cable winding device 4-8 is arranged on the left side face of the belt frame 4-7, so that the cable is conveniently wound and unwound, and the advance and retreat of the unit are facilitated.
As shown in fig. 14, the belt frame 4-7 is composed of a belt frame body 4-7-1, a funnel 4-7-2, a shield 4-7-3, an unloading roller 4-7-4, a coal blocking frame 4-7-5, an unloading belt 4-7-6, an unloading buffer roller 4-7-7, an unloading flat roller 4-7-8 and a redirection roller 4-7-9; the front end of the belt frame body 4-7-1 is hinged with the deviation adjusting frame 4-6 and can swing left and right for a certain angle, the funnel 4-7-2 is installed at the bottom of the front end of the belt frame body 4-7-1, so that gangue can fall onto the gangue throwing device 3 conveniently, the shield 4-7-3 is installed at the upper part of the front end of the belt frame body 4-7-1, so that the gangue can be effectively prevented from falling and sliding outwards, and the unloading roller 4-7-4 is installed at the front end of the belt frame body 4-7-1; the discharging buffer carrier rollers 4-7-7 are mounted on a carrier roller frame at the upper part of the belt frame body 4-7-1, the discharging flat carrier rollers 4-7-8 are mounted on a carrier roller frame at the bottom of the belt frame body 4-7-1, the redirection carrier rollers 4-7-9 are mounted at the rear end of the belt frame body 4-7-1, the discharging belts 4-7-6 are respectively wound between the discharging roller 4-7-4 and a roller of a belt conveyor through the buffer carrier rollers 4-7-7 and the discharging flat carrier rollers 4-7-8, waste rocks are conveyed to the positions 4-7-4 of the discharging roller through the discharging belts 4-7-6 and then enter the waste rock throwing device 3, 2 coal blocking frames 4-7-5 are symmetrically mounted on the upper part of the belt frame body 4-7-1, the two sides of the rear end of the unloading roller 4-7-4 can effectively prevent the gangue from slipping outwards and protect the safety of operators.
As shown in fig. 15, the rear supporting part 5 is composed of a rear supporting cylinder 5-1, a rear supporting leg 5-2 and a lower top plate 5-3; the telescopic rod of the rear support oil cylinder 5-1 is hinged with the middle part of the rear support leg 5-2, the cylinder body of the rear support oil cylinder 5-1 is hinged with the connecting lug at the upper part of the rear support seat 4-1, the number of the rear support legs 5-2 is two, the rear support legs are symmetrically arranged left and right, one end of the rear supporting seat is hinged on the rear supporting seat 4-1, the other end is hinged with the lower top plate 5-3, the telescopic rod of the rear supporting oil cylinder 5-1 is used for driving the rear supporting leg 5-2 and the lower top plate 5-3 to lift, when the telescopic rod of the rear supporting oil cylinder 5-1 extends out, the rear supporting leg 5-2 swings downwards, the lower top plate 5-3 is tightly contacted with the ground to play a role of stabilizing the machine, when the telescopic rod of the rear support oil cylinder 5-1 retracts, the rear support part 5 is retracted to the minimum state, and the normal state walking of the unit is not influenced.
Claims (8)
1. The utility model provides a retractable is tunnel waste filling machine for pit in colliery, characterized by: comprises a walking part (1), a machine body part (2), a waste rock throwing device (3), a discharging device (4), a rear supporting part (5), an electric system (6) and a hydraulic system (7); the waste rock throwing machine is characterized in that the walking part (1) is arranged on the left side and the right side below the machine body part (2), the waste rock throwing device (3) is arranged in the middle of the machine body part (2), the discharging device (4) is arranged at the rear end of the machine body part (2), the rear supporting part (5) is arranged on the left side and the right side below the discharging device (4), the electric system (6) is arranged on the right rear side of the machine body part (2), and the hydraulic system (7) is arranged on the right front side of the machine body part (2).
2. The retractable underground coal mine roadway gangue filling machine as claimed in claim 1, which is characterized in that: the walking part (1) consists of a crawler frame (1-1), two redirection chain wheels (1-2), two driving chain wheels (1-3), two crawler belts (1-4), two tensioning devices (1-5), a speed reducer (1-6) and a walking hydraulic motor (1-7); the two direction-changing sprockets (1-2) are symmetrically arranged on the left side and the right side of the front end of the crawler frame (1-1), the two driving sprockets (1-3) are symmetrically arranged on the left side and the right side of the rear end of the crawler frame (1-1), the two crawler belts (1-4) are respectively wound between the left side direction-changing sprockets (1-2) and the driving sprockets (1-3), the two tensioning devices (1-5) are arranged on the left side and the right side of the crawler frame (1-1) and are positioned behind the direction-changing sprockets (1-2), the speed reducer (1-6) is arranged in an inner cavity of the driving sprockets (1-3), the shell of the speed reducer (1-6) is connected with the driving sprockets (1-3) to drive the driving sprockets (1-3) to rotate through rotation of the shell of the speed reducer (1-6), the walking hydraulic motors (1-7) are arranged on the speed reducers (1-6), and output shafts of the walking hydraulic motors (1-7) are connected with input shafts of the speed reducers (1-6) to provide rotary drive for the speed reducers.
3. The retractable underground coal mine roadway gangue filling machine as claimed in claim 1, which is characterized in that: the machine body part (2) consists of a shovel plate (2-1), a shovel plate oil cylinder (2-2), a rack (2-3), a rotary platform (2-4), a single-row crossed roller type rotary bearing (2-5), a rotary oil cylinder (2-6), a left platform (2-7) and a right platform (2-8); the frame (2-3) is arranged above the walking part (1) and fixedly connected with the crawler frame (1-1), one end of the shovel plate (2-1) is hinged with a connecting lug at the bottom of the front end of the frame (2-3), the other end of the shovel plate is hinged with a telescopic rod of the shovel plate oil cylinder (2-2), the telescopic rod of the shovel plate oil cylinder (2-2) is hinged with a connecting seat of the shovel plate (2-1), a cylinder body of the shovel plate oil cylinder (2-2) is hinged with the connecting lug at the upper part of the front end of the frame (2-3), the telescopic rod of the shovel plate oil cylinder (2-2) moves telescopically to drive the shovel plate (2-1) to realize lifting and falling actions, and the shovel plate can be matched with the walking part (1) to realize compaction action on gangue; the rotary platform (2-4) is arranged on a single-row crossed roller type rotary bearing (2-5), one end of the single-row crossed roller type rotary bearing (2-5) is fixedly connected with the rotary platform (2-4), the other end of the single-row crossed roller type rotary bearing is fixedly connected with a rack (2-3), the rotary oil cylinders (2-6) are symmetrically arranged in left and right directions, a telescopic rod of each oil cylinder is hinged with an oil cylinder fixing seat at the rear end of the rotary platform (2-4), a cylinder body of each oil cylinder is hinged with a connecting lug at the rear end of the rack (2-3), and the rotary oil cylinders (2-6) move in a telescopic mode to drive the rotary platform (2-4), a left platform (2-7) and a right platform (2-8) which are arranged on the rotary platform to rotate left and right; the left platform (2-7) is fixed on the upper portion of the left side of the rotary platform (2-4), the right platform (2-8) is fixed on the upper portion of the right side of the rotary platform (2-4), and the left platform (2-7) and the right platform (2-8) can rotate left and right along with the rotary platform (2-4).
4. The retractable underground coal mine roadway gangue filling machine as claimed in claim 1, which is characterized in that: the waste rock throwing device (3) consists of a support frame (3-1), a roller (3-2), a buffer carrier roller (3-3), a belt (3-4), a V-shaped belt cleaner (3-5), a flat carrier roller (3-6), a coal blocking frame I (3-7), a coal blocking frame II (3-8), a coal blocking frame III (3-9), a driving device (3-10), a slide way (3-11), a support frame supporting oil cylinder (3-12), a straight belt cleaner (3-13), a gear device (3-14), a telescopic device (3-15), a sliding device (3-16) and a guide wheel (3-17); the rear end connecting lug of the support frame (3-1) is hinged with the connecting lug on the rotary platform (2-4), the roller (3-2) is installed at the front end of the support frame (3-1), the driving device (3-10) is installed at the rear end of the support frame (3-1), the belts (3-4) are respectively wound between the roller (3-2) and the driving device (3-10), and the driving device (3-10) drives the belts (3-4) to operate, so that the gangue conveying effect is realized; the buffer carrier rollers (3-3) and the flat carrier rollers (3-6) are respectively arranged in corresponding carrier roller mounting grooves of the support frame (3-1) and play roles in buffering and supporting the belt (3-4); the coal blocking frame I (3-7) and the coal blocking frame II (3-8) are arranged at the upper position of the front part of the support frame (3-1), the coal blocking frame III (3-9) is arranged at the upper position of the rear part of the support frame (3-1) and is designed to be a V-shaped structure, the slide ways (3-11) are arranged in bilateral symmetry and are fixedly connected with the support frame (3-1) and are arranged at the inner end surfaces of the two sides of the support frame (3-1), the gear device (3-14) is arranged at the front left side position of the support frame (3-1), the telescopic device (3-15) is arranged at the inner side position below the support frame (3-1), the gear of the gear device (3-14) is meshed with the rack (3-15-8) of the telescopic device (3-15), and the gear device (3-14) operates to drive the telescopic device (3-15) to realize the front, the sliding device (3-16) is arranged at the right front side of the support frame (3-1), the sliding device (3-16) can limit and guide the telescopic device (3-15), and the sliding device is matched with the gear device (3-14) to ensure that the telescopic device (3-15) can realize the telescopic function along the linear direction; the V-shaped belt cleaning device (3-5) and the straight belt cleaning device (3-13) are arranged at corresponding positions of the waste rock throwing device (3), and materials adhered to the surface of the belt are cleaned through friction of the V-shaped belt cleaning device (3-5) and the straight belt cleaning device (3-13) and the belt (3-4), so that a belt cleaning effect is realized; the guide wheels (3-17) are installed at the front side of the bottom of the support frame (3-1) and guide the telescopic devices (3-15), the support frame support oil cylinders (3-12) are divided into two parts which are symmetrically arranged left and right, telescopic rods of the guide wheels are hinged to connecting lugs on two sides of the middle of the support frame (3-1), cylinder bodies of the guide wheels are hinged to fixing seats at the front ends of the left platform (2-7) and the right platform (2-8), and the telescopic rods of the support frame support oil cylinders (3-12) stretch to drive the whole gangue throwing device (3) to achieve integral lifting.
5. The retractable underground coal mine roadway gangue filling machine as claimed in claim 4, which is characterized in that: the expansion device (3-15) consists of an expansion bracket (3-15-1), a waste rock throwing driving device (3-15-2), a throwing belt (3-15-3), a waste rock throwing buffer carrier roller (3-15-4), a waste rock throwing leveling carrier roller (3-15-5), a waste rock throwing roller (3-15-6), a sliding bracket guide wheel (3-15-7) and a rack (3-15-8); the expansion bracket (3-15-1) is arranged in the support frame (3-1), the waste rock throwing driving device (3-15-2) is installed at the front end of the expansion bracket (3-15-1), the waste rock throwing roller (3-15-6) is installed at the rear part of the expansion bracket (3-15-1), the throwing belts (3-15-3) are respectively wound between the waste rock throwing driving device (3-15-2) and the waste rock throwing roller (3-15-6), and the waste rock throwing driving device (3-15-2) drives the throwing belts (3-15-3) to run; the waste rock throwing buffer carrier roller (3-15-4) is arranged in a carrier roller mounting groove at the upper part of the expansion bracket (3-15-1), can buffer the impact of the fallen waste rock on the throwing belt (3-15-3) and plays a role of supporting the throwing belt (3-15-3), the waste rock throwing buffer carrier roller (3-15-5) is arranged in a carrier roller mounting groove at the lower part of the expansion bracket (3-15-1) and plays a role of supporting the throwing belt (3-15-3), the running resistance of the throwing belt (3-15-3) is reduced, and the stable running of the throwing belt (3-15-3) is ensured; the four sliding frame guide wheels (3-15-7) are symmetrically arranged on the two sides of the rear part of the telescopic frame (3-15-1) in a left-right manner, and when the telescopic device (3-15) is telescopic, the guide wheels (3-15-7) roll along the slide ways (3-11); the rack (3-15-8) is fixed on the left side surface of the telescopic frame (3-15-1), the tooth surface of the rack is meshed with the gear tooth surface of the gear device (3-14), and the rack (3-15-8) is driven to realize the linear telescopic motion of the telescopic device (3-15) when the gear device (3-14) rotates.
6. The retractable underground coal mine roadway gangue filling machine as claimed in claim 1, which is characterized in that: the discharging device (4) consists of a rear supporting seat (4-1), a deviation adjusting oil cylinder (4-2), a deviation adjusting platform (4-3), a supporting seat (4-4), an adjusting oil cylinder (4-5), a deviation adjusting frame (4-6), a belt frame (4-7) and a cable rolling device (4-8); the front end of the rear supporting seat (4-1) is fixedly connected with the rear end of the rack (2-3), the deviation adjusting oil cylinders (4-2) are symmetrically arranged left and right, the cylinder bodies of the deviation adjusting oil cylinders are hinged with the connecting lugs on the two sides of the rear supporting seat (4-1), the telescopic rods of the deviation adjusting oil cylinders are hinged with the connecting lugs at the bottom of the deviation adjusting platform (4-3), the telescopic rods of the deviation adjusting oil cylinders (4-2) stretch to drive the deviation adjusting platform (4-3) to adjust left and right small angles, and the left and right small-angle leveling of the discharging device (4) is realized; the bottom of the supporting seat (4-4) is fixedly connected with the deviation adjusting platform (4-3), a connecting lug at the upper part of the supporting seat (4-4) is hinged with a connecting lug at the bottom of the deviation adjusting frame (4-6), a cylinder body of the adjusting oil cylinder (4-5) is hinged with a connecting lug at the rear end of the deviation adjusting platform (4-3), a telescopic rod of the adjusting oil cylinder (4-5) is hinged with a connecting lug at the rear end of the bottom of the deviation adjusting frame (4-6), and the telescopic rod of the adjusting oil cylinder (4-5) stretches to drive the discharging device (4) to lift, so that the vertical small-angle adjustment of the discharging device (4) is realized; the front end connecting lug of the belt frame (4-7) is hinged with the deviation adjusting frame (4-6), and the cable rolling device (4-8) is installed on the left side face of the belt frame (4-7).
7. The retractable underground coal mine roadway gangue filling machine as claimed in claim 6, which is characterized in that: the belt frame (4-7) consists of a belt frame body (4-7-1), a funnel (4-7-2), a shield (4-7-3), an unloading roller (4-7-4), a coal blocking frame (4-7-5), an unloading belt (4-7-6), an unloading buffer roller (4-7-7), an unloading flat roller (4-7-8) and a redirection roller (4-7-9); the front end of the belt frame body (4-7-1) is hinged with the deviation adjusting frame (4-6) and can swing left and right for a certain angle, the funnel (4-7-2) is installed at the bottom of the front end of the belt frame body (4-7-1) to facilitate gangue to fall onto the gangue throwing device (3), and the shield (4-7-3) is installed at the upper part of the front end of the belt frame body (4-7-1); the unloading belt conveyor is characterized in that the unloading roller (4-7-4) is arranged at the front end of the belt frame body (4-7-1), the unloading buffer carrier roller (4-7-7) is arranged on a carrier roller frame at the upper part of the belt frame body (4-7-1), the unloading flat carrier roller (4-7-8) is arranged on a carrier roller frame at the bottom of the belt frame body (4-7-1), the redirection carrier roller (4-7-9) is arranged at the rear end of the belt frame body (4-7-1), the unloading belt (4-7-6) is respectively wound between the unloading roller (4-7-4) and a roller of the belt conveyor through the buffer carrier roller (4-7-7) and the unloading flat carrier roller (4-7-8), and waste rocks are conveyed to the position of the unloading roller (4-7-4) through the unloading belt (4-7-6), and then the coal enters a gangue throwing device (3), wherein 2 coal blocking frames (4-7-5) are symmetrically arranged at the upper part of the belt frame body (4-7-1) and the two sides of the rear end of the unloading roller (4-7-4).
8. The retractable underground coal mine roadway gangue filling machine as claimed in claim 1, which is characterized in that: the rear supporting part (5) consists of a rear supporting oil cylinder (5-1), a rear supporting leg (5-2) and a lower top plate (5-3); the telescopic rod of the rear supporting oil cylinder (5-1) is hinged to the middle of the rear supporting leg (5-2), the cylinder body of the rear supporting oil cylinder (5-1) is hinged to a connecting lug on the upper portion of the rear supporting seat (4-1), the rear supporting legs (5-2) are arranged symmetrically left and right, one end of each of the rear supporting legs is hinged to the rear supporting seat (4-1), the other end of each of the rear supporting legs is hinged to the lower top plate (5-3), and the rear supporting legs (5-2) and the lower top plate (5-3) are driven to lift through the telescopic rod of the rear supporting oil cylinder (5-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234563.9A CN112240222A (en) | 2020-11-07 | 2020-11-07 | Retractable colliery is tunnel waste filling machine for pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011234563.9A CN112240222A (en) | 2020-11-07 | 2020-11-07 | Retractable colliery is tunnel waste filling machine for pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112240222A true CN112240222A (en) | 2021-01-19 |
Family
ID=74170288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011234563.9A Pending CN112240222A (en) | 2020-11-07 | 2020-11-07 | Retractable colliery is tunnel waste filling machine for pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112240222A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550786A (en) * | 2021-08-25 | 2021-10-26 | 平顶山平煤机煤矿机械装备有限公司 | Self-moving multidirectional quick roadway gangue throwing and backfilling device |
| CN114000883A (en) * | 2021-11-02 | 2022-02-01 | 中国矿业大学 | Open pit coal mine end slope coal pressing, mining and charging integrated recovery device and method |
-
2020
- 2020-11-07 CN CN202011234563.9A patent/CN112240222A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550786A (en) * | 2021-08-25 | 2021-10-26 | 平顶山平煤机煤矿机械装备有限公司 | Self-moving multidirectional quick roadway gangue throwing and backfilling device |
| CN113550786B (en) * | 2021-08-25 | 2023-12-12 | 平顶山平煤机煤矿机械装备有限公司 | Self-moving multidirectional rapid roadway gangue throwing backfill device |
| CN114000883A (en) * | 2021-11-02 | 2022-02-01 | 中国矿业大学 | Open pit coal mine end slope coal pressing, mining and charging integrated recovery device and method |
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