CN108301833B - Full negative pressure short wall filling coal mining method - Google Patents
Full negative pressure short wall filling coal mining method Download PDFInfo
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- CN108301833B CN108301833B CN201810151620.3A CN201810151620A CN108301833B CN 108301833 B CN108301833 B CN 108301833B CN 201810151620 A CN201810151620 A CN 201810151620A CN 108301833 B CN108301833 B CN 108301833B
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- 238000005065 mining Methods 0.000 title claims abstract description 151
- 239000003245 coal Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000005641 tunneling Effects 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 7
- 239000002023 wood Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 2
- 230000001351 cycling effect Effects 0.000 claims 1
- 108091006146 Channels Proteins 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000011084 recovery Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000010878 waste rock Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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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
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
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Abstract
The invention provides a full negative pressure short wall filling coal mining method, which comprises the following steps of 10, determining the positions of a centralized return air roadway and a centralized transport roadway, and arranging a transport gate way, a first return air gate way and a second return air gate way; step 20, tunneling one branch roadway of the first mining area, tunneling one branch roadway of the second mining area after the branch roadway is penetrated, supporting the penetrated branch roadway and blocking a communication port between the penetrated branch roadway and a transportation gateway; step 30, filling the penetrated branch roadway after the plugging is finished; step 40, tunneling the other branch roadway of the first mining area, supporting the through branch roadway in the second mining area and blocking a communication port between the through branch roadway and the transportation gateway; step 50, filling the through branch roadway in the second mining area after the plugging is finished; step 60, circulating the steps 10 to 50 until the lane is filled; and 70, after filling, sequentially extracting the reserved coal pillar roadways according to the direction from the far end to the near end.
Description
Technical Field
The invention relates to the field of coal mines and mining methods, in particular to a full-negative-pressure short-wall filling coal mining method.
Background
The coal pressing amount of the production mine of China reaches 143 hundred million tons, along with the high-speed development of economy of China, the development and the utilization of coal resources are higher and higher, and the coal pressing exploitation under buildings, railways, water bodies and pressure bearing water ("three next to one") becomes a main problem facing coal exploitation. For a long time, the coal under construction in China mainly adopts village relocation, strip mining, water sand filling, overburden separation layer grouting and other modes. On one hand, village moving land is difficult to assess and has high cost, thus bringing heavy economic burden to coal mine enterprises; because the moving distance is too large, the method brings great inconvenience to farmers in production and living. On the other hand, the traditional filling mining mode has the disadvantages of lag process, high filling cost and difficult maintenance and popularization. Coal gangue produced by exploitation, fly ash produced by coal burning in a power plant and the like also bring a series of problems of air pollution, water pollution, occupied cultivated land and the like. There is a need for an economical, rational, sustainable filling means for treating gangue and fly ash.
Disclosure of Invention
The invention provides a full negative pressure short wall filling coal mining method, which aims to improve the mining efficiency and reduce the mining cost.
The technical scheme adopted for solving the technical problems is as follows: the full negative pressure short wall filling coal mining method comprises the following steps:
Step 10, determining positions of a centralized return air channel and a centralized transport channel, arranging transport sequence channels, a first return air sequence channel and a second return air sequence channel which are arranged in parallel at intervals along the direction of inclination of a working surface, enabling one end of the transport sequence channel to be communicated with the centralized transport channel, enabling one end of the first return air sequence channel and one end of the second return air sequence channel to be communicated with the centralized return air channel, enabling a first mining area to be formed between the transport sequence channel and the first return air sequence channel, enabling a second mining area to be formed between the transport sequence channel and the second return air sequence channel, enabling a plurality of branch channels and a plurality of coal pillar channels to be arranged in the first mining area and the second mining area, and enabling one coal pillar to be arranged between two adjacent branch channels;
Step 20, tunneling one branch lane at the far end of the first mining area along the direction of the inclination of the working face, wherein the side close to the centralized transportation lane is the near end, and the side far away from the centralized transportation lane is the far end;
Step 30, filling the through branch roadway in the first mining area after the communication port between the through branch roadway and the transportation gate way in the first mining area is plugged;
Step 40, tunneling the other branch roadway at the far end of the first mining area after the one branch roadway at the far end of the second mining area is penetrated, supporting the penetrated branch roadway in the second mining area and blocking a communication port between the penetrated branch roadway and a transportation gate in the second mining area;
Step 50, filling the through branch roadway in the second mining area after the communication port between the through branch roadway and the transportation gate is blocked;
step 60, circulating the steps 10 to 50 until the branch roadways in the first mining area and the second mining area are filled;
And 70, after the branch roadways in the first mining area and the second mining area are filled, sequentially stoping the reserved coal pillar roadway according to the direction from the far end to the near end.
Further, in step 20 and step 40, the specific method for plugging the branch roadway is as follows: and sealing the three-fork formed by the branch roadway and the transportation gate by adopting a wood plate, and supporting a hydraulic single prop on the outer side of the wood plate.
Further, in step 30 and step 50, the specific method for filling the penetrated branch roadway is as follows:
Waste rubber belt conveyors are uniformly distributed in the first return air cis-slot and the second return air cis-slot, and filling slurry is transported to the upper opening of a through branch roadway through the waste rubber belt conveyors;
and a first filling pump is arranged at the junction of the first return air gate and the centralized return air gate, a second filling pump is arranged at the junction of the second return air gate and the centralized return air gate, and the filling slurry is correspondingly filled into the through branch gate through the first filling pump and the second filling pump.
Further, step 70 is followed by step 80: and after the coal pillar roadway is exploited, sequentially filling the coal pillar roadway.
Further, step 10 includes:
Mirror arranging the first and second mining areas and dividing the vertical mining area and the inclined mining area in the first mining area;
In the vertical mining area, the branch roadway and the coal pillar roadway are alternately arranged along the inclined direction of the working face, and the branch roadway and the coal pillar roadway are vertical to the transportation gateway;
in the inclined mining area, the branch roadway and the coal pillar roadway are alternately arranged in parallel along the inclined direction of the working face, and an included angle is formed between the branch roadway and the coal pillar roadway and the transportation gate way.
Further, the included angle between the branch road and the transportation gate way is 60-80 degrees.
Further, step 10 includes: and a cutting hole is arranged at the far end, so that the cutting hole is connected with the other end of the transportation cis-slot, the other end of the first return air cis-slot and the other end of the second return air cis-slot.
The invention has the advantages that,
1. According to the whole technical scheme, two mining areas are designed, each mining area is divided into a plurality of branch roadways and coal pillar roadways, a set of transportation system is shared, the continuous excavator is adopted for the stoping of the branch roadways, and the filling protection coal pillar roadways and the retaining coal pillar roadway support top plates are adopted; and when a certain supporting force is formed by filling, the secondary recovery of the coal pillar roadway is carried out, and the management of a complete non-collapse method is carried out, so that the ecological environment is ensured not to be damaged.
2. According to the invention, four working procedures of digging, picking, supporting and filling are distributed to different branch roadways in space, so that effective isolation is realized, mutual influence is avoided, and the safety degree is greatly improved; filling in a branch roadway after stoping is completed by adopting a coal rubber belt conveyor, a scraper and a filling pump, so as to realize parallel mining and filling operation; the coal conveying system and the filling system are two independent systems respectively, and the coal conveying system is responsible for coal transportation of a stope branch roadway; the filling system is responsible for transporting filling materials in a branch roadway after stoping is finished, the two sets of systems are not affected by each other, work division is clear, parallel operation is carried out, and the working efficiency of coal transportation and filling is improved; in a word, the excavating, mining, supporting and charging are all operated in parallel and mechanically operated continuously at the same time, so that the production capacity is greatly improved.
3. By adopting the production mode, the working face realizes the mining without coal pillars among the sections, and the return air cis-slot of the working face of the previous section can be reserved as the return air cis-slot of the working face of the next section, so that the mining without residual coal pillars is finally realized, and the resource recovery rate is high.
4. The production system is simple, the equipment occupation is small, the personnel occupation is small, the efficiency and the recovery rate are high, the compaction rate and the strength are high, the production management is simple, and the safety degree is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Reference numerals in the drawings: 1. centralized return air lane; 2. centralized transportation lane; 3. a first filling pump; 4. a filling pipe; 51. a first return air cis-slot; 52. a second return air cis-slot; 6. an explosion-proof loader; 7. a continuous excavator; 8. transportation cis-slots; 10. a coal rubber belt conveyor; 11. supporting the roadway; 12. coal pillar roadway; 13. the second gangue belt conveyor; 16. a second filling pump; 17. the first gangue belt conveyor; 19. an anchor rod drill carriage; 90. and (5) cutting eyes.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in FIG. 1, the invention provides a full negative pressure short wall filling coal mining method, which comprises the following steps:
Step 10, determining positions of a centralized return air channel 1 and a centralized transport channel 2, arranging transport gateroads 8, a first return air gateroads 51 and a second return air gateroads 52 which are arranged at intervals in parallel along the direction of inclination of a working surface, enabling the transport gateroads 8 to be arranged between the first return air gateroads 51 and the second return air gateroads 52, enabling one end of the transport gateroads 8 to be communicated with the centralized transport channel 2, enabling one end of the first return air gateroads 51 and one end of the second return air gateroads 52 to be communicated with the centralized return air channel 1, enabling a first mining area to be formed between the transport gateroads 8 and the first return air gateroads 51, enabling a second mining area to be formed between the transport gateroads 8 and the second return air gateroads 52, enabling a plurality of branch channels 11 and a plurality of coal pillars 12 to be arranged in the first mining area and in the second mining area, and enabling one coal pillar channel 12 to be arranged between two adjacent branch channels 11;
Step 20, tunneling one branch lane 11 at the far end of the first mining area along the direction of the inclination of the working face, wherein the side close to the centralized transportation lane 2 is the near end, and the side far away from the centralized transportation lane 2 is the far end, tunneling one branch lane 11 at the far end of the second mining area after the branch lane 11 is communicated, supporting the communicated branch lane 11 in the first mining area and blocking a communication port between the communicated branch lane 11 and the transportation gateway 8 in the first mining area;
step 30, filling the through branch lane 11 in the first mining area after the communication port between the through branch lane 11 and the transportation gate 8 in the first mining area is blocked;
Step 40, tunneling the other branch lane 11 at the far end of the first mining area after the one branch lane 11 at the far end of the second mining area is penetrated, supporting the penetrated branch lane 11 in the second mining area and blocking a communication port between the penetrated branch lane 11 and the transportation gate 8 in the second mining area;
Step 50, filling the through branch road 11 in the second mining area after the communication port between the through branch road 11 and the transportation gate 8 in the second mining area is blocked;
Step 60, circulating the steps 10 to 50 until the branch lanes 11 in the first mining area and the second mining area are filled;
And step 70, after the branch roadways 11 in the first mining area and the second mining area are filled, sequentially extracting the reserved coal pillar roadways 12 according to the direction from the far end to the near end.
Specifically, tunneling a centralized transportation roadway 2 and a centralized return air roadway 1, and determining the positions of a transportation gate 8, a first return air gate 51 and a second return air gate 52 according to the inclined length of a working face of 60-100 m; tunneling the transportation gate 8 along the working face in the centralized transportation gate 2, tunneling the first return gate 51 and the second return gate 52 along the working face in the centralized return gate 1, and tunneling the cut hole 90 at the edge of the mining area; a W-shaped ventilation system for the coal mining section face is formed (a W-shaped ventilation system is formed at the position of the cutting hole). Dividing the first mining area and the second mining area into a plurality of branch lanes 11 and a plurality of coal pillar lanes 12, wherein the width of each branch lane 11 is 4.5m, and a coal pillar lane 12 with the width of 5m is reserved between the two branch lanes 11.
Through setting up transportation gate 8, first return air gate 51 and second return air gate 52, divide into first mining district and second mining district with the mine, all be provided with a plurality of drifts 11 and a plurality of coal pillar lane 12 that alternate in proper order simultaneously at every mining district, can realize when exploitation drifts 11, utilize coal pillar lane 12 to support, treat that drifts 11 exploit and fill after finishing, can stope coal pillar lane 12 to realize the purpose that does not collapse completely, ensure that ecological environment is not destroyed, and then can reach the purpose (need not carry out the bulk and move) that reduces exploitation cost.
The mining sequence of the branch lanes 11 adopts the back-type left-right alternate mining, that is, the mining is firstly performed from the branch lane 11 at the farthest end of the first mining area, and then the mining is performed on the branch lane 11 at the farthest end by entering the second mining area. And then returning to the first mining area, mining the most distal end of the existing unexplored branch lanes 11 in the first mining area, and so on until the mining is finished.
Further, step 10 includes:
Mirror arranging the first and second mining areas and dividing the vertical mining area and the inclined mining area in the first mining area; in the vertical mining area, the branch roadway 11 and the coal pillar roadway 12 are alternately arranged along the inclined direction of the working face, and the branch roadway 11 and the coal pillar roadway 12 are vertical to the transportation gateway 8; in the inclined mining area, the branch roadway 11 and the coal pillar roadway 12 are alternately arranged in parallel along the inclined direction of the working face, and the branch roadway 11 and the coal pillar roadway 12 have included angles with the transportation gateway 8.
The first mining area and the second mining area are arranged in a mirror image mode, the first mining area and the second mining area are identical in structure and are symmetrically arranged, and the first mining area is taken as an example for illustration. The first mining area comprises a vertical mining area and an inclined mining area, in the vertical mining area, branch roadways 11 and coal pillar roadways 12 are alternately arranged along the inclined direction of the working face, and the branch roadways 11 and the coal pillar roadways 12 are vertical to the transportation gateway 8; in the inclined mining area, the branch lanes 11 and the coal pillar lanes 12 are alternately arranged in parallel along the inclined direction of the working face, and the branch lanes 11 and the coal pillar lanes 12 have included angles with the transportation gateway 8. The angle between the branch road 11 and the transport chute 8 is of the order of 60 ° to 80 °, most preferably of the order of 60 °.
The vertical production zone is disposed at the proximal end and the inclined production zone is disposed at the distal end, and the length of the vertical production zone in the direction of the face inclination is smaller than the length of the inclined production zone in the direction of the face inclination of the mine structure. When approaching the centralized transportation roadway 2, if the arrangement mode of the inclined mining areas is still adopted, two triangular non-mining areas are formed at the upper left corner and the upper right corner in fig. 1, and resource waste is easily caused. Therefore, the embodiment of the invention is provided with the vertical mining area close to the centralized transportation lane 2, so that the triangular non-mining area can be conveniently mined, and the aim of increasing the mining amount of the coal mine is fulfilled.
The junction of the first return air gate 51 and the centralized return air lane 1 is provided with a first filling pump 3, and a filling pipe 4 connected with the first filling pump 3 is arranged in the first return air gate 51. A second filling pump 16 is arranged at the junction of the second return air gate 52 and the centralized return air lane 1, and a filling pipe 4 connected with the second filling pump 16 is arranged in the second return air gate 52. The first return air slot 51 is further internally provided with a first gangue belt conveyor 17, which is adapted to the length of the first return air slot 51. The second return air cis groove 52 is internally provided with a second gangue belt conveyor 13 which is matched with the length of the second return air cis groove 52. The first gangue belt conveyor 17 and the second gangue belt conveyor 13 are used for uniformly mixing gangue from an underground buffer gangue warehouse with water, cement, fly ash and auxiliary materials according to a certain proportion from a ground pulping station to prepare filling slurry. A coal rubber belt conveyor 10 is arranged in the transport chute 8 for conveying the products.
For example, the method for mining the branch roadway 11 is described, a coal rubber belt conveyor 10 is arranged in a transportation gate 8, a first gangue belt conveyor 17 is arranged in a first return air gate 51, a second gangue belt conveyor 13 is arranged in a second return air gate 52, and a first filling pump 3 and a second filling pump 16 are correspondingly arranged at set positions, and meanwhile, filling pipes 4 are correspondingly connected.
Mining one of the branch roadways 11 in the first mining area by adopting the continuous miner 7, transporting and transferring the mined coal to the transportation gateway 8 by using the explosion-proof loader 6, transferring the coal into a mine transportation system by using the coal rubber belt conveyor 10, returning the continuous miner 7 to the opposite branch roadway 11 in the second mining area after one cycle operation construction is completed (taking fig. 1 as an example, the branch roadway arranged along the mirror image of the transportation gateway 8 is the opposite branch roadway), and simultaneously carrying out supporting operation on the branch roadway 11 which is just mined.
After the construction of the opposite branch lanes 11 is completed, the continuous excavator 7 returns to one branch lane 11 in the first mining area for stoping, and meanwhile, the anchor rod drill carriage 19 enters the opposite branch lane 11 in the second mining area for branch lane support until one branch lane 11 in the first mining area and the opposite branch lane 11 in the second mining area are communicated with the corresponding return air channel, and the continuous excavator 7 is transferred into the adjacent branch lane for construction.
In step 20 and step 40, the specific method for plugging the branch road 11 is as follows: the branch road 11 and the transportation gate 8 form a three-fork, which is sealed by a wood board, and the outside of the wood board is supported with a hydraulic single prop. Wherein the outer side of the wood board is the side close to the transportation chute 8. When the branch roadway 11 is supported, the top plate of the branch roadway 11 is supported by high-strength anchor rods and anchor cables, and the two sides of the branch roadway 11 are not supported or are supported by anchor mesh belts according to the coal seam condition.
In step 30 and step 50, the specific method for filling the penetrated branch road 11 is as follows:
Waste rubber belt conveyors are uniformly distributed in the first return air cis-slot 51 and the second return air cis-slot 52, and filling slurry is transported to the upper opening of the penetrated branch lane 11 through the waste rubber belt conveyors;
A first filling pump 3 is arranged at the intersection of the first return air gate 51 and the concentrated return air lane 1, a second filling pump 16 is arranged at the intersection of the second return air gate 52 and the concentrated return air lane 1, and filling slurry is correspondingly filled into the penetrated branch lane 11 through the first filling pump 3 and the second filling pump 16.
The filling slurry is prepared by uniformly mixing gangue from an underground buffer gangue bin with water, cement, fly ash and auxiliary materials according to a certain proportion from a ground pulping station.
During filling, the waste rock and the slurry enter the branch roadway 11 from the upper opening of the branch roadway 11, firstly, the waste rock and the slurry are mixed and then automatically flow to fill a part, secondly, an explosion-proof loader 6 is used for shoveling a part, thirdly, a corresponding filling pump is used for solving the roof connection problem, the initial supporting force of a filling body is ensured, and finally, the concrete is injected by the corresponding filling pump until the upper opening of the branch roadway 11 is closed.
In order to ensure the mining efficiency, the supporting and plugging-completed branch lanes 11 may be filled after the continuous excavator 7 is shifted into the adjacent branch lanes 11, so as to ensure the construction efficiency.
Step 70 is followed by step 80: and after the coal pillar roadway 12 is mined, sequentially filling the coal pillar roadway 12. The filling operation of the pillar roadway 12 is to determine whether to fill the goaf roadway formed after the pillar is recovered according to the results of the underground mine pressure observation and the ground surface movement observation, and the filling operation is to be performed according to the method of the filling branch roadway 11 when the filling operation is required.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. According to the whole technical scheme, two mining areas are designed, each mining area is divided into a plurality of branch roadways 11 and coal pillar roadways 12, a set of transportation system is shared, the continuous excavator 7 is adopted to carry out the stoping of the branch roadways 11, the coal pillar roadways 12 are protected by filling, and a supporting top plate of the coal pillar roadway 12 is reserved; and when a certain supporting force is formed by filling, the secondary recovery of the coal pillar roadway 12 is carried out, and the management of a complete non-collapse method is carried out, so that the ecological environment is ensured not to be damaged.
2. According to the invention, four working procedures of digging, picking, supporting and filling are distributed to different branch roadways 11 in space, so that effective isolation is realized, mutual influence is avoided, and the safety degree is greatly improved; filling is carried out in a branch roadway 11 after stoping is finished by adopting a coal rubber belt conveyor 10, a scraper and a filling pump, so that parallel mining and filling operations are realized; the coal conveying system and the filling system are two independent systems respectively, and the coal conveying system is responsible for coal transportation of the stope branch roadway 11; the filling system is responsible for transporting filling materials of the branch roadway 11 after stoping is finished, the two sets of systems are not affected by each other, work division is clear, and parallel operation is performed, so that the working efficiency of coal transportation and filling is improved; in a word, the excavating, mining, supporting and charging are all operated in parallel and mechanically operated continuously at the same time, so that the production capacity is greatly improved.
3. By adopting the production mode, the working face realizes the mining without coal pillars among the sections, and the return air cis-slot of the working face of the previous section can be reserved as the return air cis-slot of the working face of the next section, so that the mining without residual coal pillars is finally realized, and the resource recovery rate is high.
4. The production system is simple, the equipment occupation is small, the personnel occupation is small, the efficiency and the recovery rate are high, the compaction rate and the strength are high, the production management is simple, and the safety degree is high.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (6)
1. The full negative pressure short wall filling coal mining method is characterized by comprising the following steps of:
Step 10, determining positions of a centralized return air roadway (1) and a centralized transport roadway (2), arranging transport gateroads (8), first return air gateroads (51) and second return air gateroads (52) which are arranged at intervals in parallel along a direction of inclination of a working surface, enabling the transport gateroads (8) to be arranged between the first return air gateroads (51) and the second return air gateroads (52), enabling one end of the transport gateroads (8) to be communicated with the centralized transport roadway (2), enabling one end of the first return air gateroads (51) and one end of the second return air gateroads (52) to be communicated with the centralized return air roadway (1), enabling a first mining area to be formed between the transport gateroads (8) and the first return air gateroads (51), enabling a second mining area to be formed between the transport gateroads (8) and the second return air gateroads (52), and enabling the first mining area and the second mining area to be arranged in a mirror image mode. A plurality of branch roadways (11) and a plurality of coal pillar roadways (12) are arranged in the first mining area and the second mining area, and one coal pillar roadway (12) is arranged between two adjacent branch roadways (11);
Step 20, tunneling one branch lane (11) at the far end of the first mining area along the direction of inclination of the working face, wherein one side close to the centralized transportation lane (2) is a near end, and one side far away from the centralized transportation lane (2) is a far end, tunneling one branch lane (11) at the far end of the second mining area after the branch lane (11) is communicated, supporting the communicated branch lane (11) in the first mining area and blocking a communication port between the communicated branch lane (11) and a transportation gateway (8) in the first mining area;
Step 30, filling the through branch roadway (11) in the first mining area after the communication port between the through branch roadway (11) and the transportation gateway (8) in the first mining area is blocked;
Step 40, tunneling the other branch lane (11) at the far end of the first mining area after the one branch lane (11) at the far end of the second mining area is penetrated, supporting the penetrated branch lane (11) in the second mining area and blocking a communication port between the penetrated branch lane (11) and a transportation gate way (8) in the second mining area;
step 50, filling the through branch roadway (11) in the second mining area after the communication port between the through branch roadway (11) and the transportation gateway (8) in the second mining area is blocked;
step 60, cycling the steps 10 to 50 until the branch roadways (11) in the first mining area and the second mining area are filled;
step 70, sequentially extracting the reserved coal pillar roadway (12) according to the direction from the far end to the near end after the branch roadway (11) in the first mining area and the second mining area are filled;
wherein, the step 10 includes:
Arranging the first and second mining areas in mirror image and dividing vertical and oblique mining areas in the first mining area;
in the vertical mining area, the branch roadway (11) and the coal pillar roadway (12) are alternately arranged along the inclined direction of the working face, and the branch roadway (11) and the coal pillar roadway (12) are vertical to the transportation gateway (8);
In the inclined mining area, the branch roadway (11) and the coal pillar roadway (12) are alternately arranged in parallel along the inclined direction of the working face, and the branch roadway (11) and the coal pillar roadway (12) have included angles with the transportation gateway (8).
2. The full negative pressure short wall filling coal mining method according to claim 1, wherein in the steps 20 and 40, the specific method for plugging the branch road (11) is as follows: and sealing the branch road (11) and the branch road (8) by adopting a wood plate, and supporting a hydraulic single prop on the outer side of the wood plate.
3. The full negative pressure short wall filling coal mining method according to claim 1, characterized in that, in the steps 30 and 50, the concrete method of filling the penetrated branch road (11) is as follows:
Waste rubber belt conveyors are respectively arranged in the first return air cis-slot (51) and the second return air cis-slot (52), and filling slurry is transported to the upper opening of the penetrated branch lane (11) through the waste rubber belt conveyors;
A first filling pump (3) is arranged at the intersection of the first return air gate (51) and the centralized return air lane (1), a second filling pump (16) is arranged at the intersection of the second return air gate (52) and the centralized return air lane (1), and the filling slurry is correspondingly filled into the penetrated branch lane (11) through the first filling pump (3) and the second filling pump (16).
4. The full negative pressure shortwall mining method as set forth in claim 1, wherein the step 70 is followed by the step 80 of: and after the coal pillar roadway (12) is mined, sequentially filling the coal pillar roadway (12).
5. The full negative pressure short wall filling coal mining method according to claim 1, characterized in that the angle between the branch road (11) and the transportation gate way (8) is 60 ° to 80 °.
6. The full negative pressure shortwall mining method as set forth in claim 1, wherein the step 10 includes: and a cutting hole (90) is arranged at the far end, so that the cutting hole (90) is connected with the other end of the transportation cis-slot (8), the other end of the first return air cis-slot (51) and the other end of the second return air cis-slot (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810151620.3A CN108301833B (en) | 2018-02-14 | 2018-02-14 | Full negative pressure short wall filling coal mining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810151620.3A CN108301833B (en) | 2018-02-14 | 2018-02-14 | Full negative pressure short wall filling coal mining method |
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| CN109915145A (en) * | 2019-04-16 | 2019-06-21 | 中国矿业大学 | Recovery method is filled by a kind of office of adopting, mine coal resources office |
| CN112253115B (en) * | 2020-10-14 | 2023-06-16 | 中国矿业大学(北京) | Near-horizontal coal seam roadway type cemented filling mining method |
| CN117090573B (en) * | 2023-10-17 | 2023-12-19 | 臣功环境科技有限公司 | Z-type full-wind-pressure staggered strip continuous mining and continuous charging integrated process for mine |
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