CN102155260B - Method for filling heavy-pitch coal bed goaf - Google Patents

Method for filling heavy-pitch coal bed goaf Download PDF

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Publication number
CN102155260B
CN102155260B CN2011101331440A CN201110133144A CN102155260B CN 102155260 B CN102155260 B CN 102155260B CN 2011101331440 A CN2011101331440 A CN 2011101331440A CN 201110133144 A CN201110133144 A CN 201110133144A CN 102155260 B CN102155260 B CN 102155260B
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China
Prior art keywords
goaf
air cushion
filling
spoil
grouting
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CN2011101331440A
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Chinese (zh)
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CN102155260A (en
Inventor
柏建彪
陈勇
冯伟
王襄禹
徐营
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中国矿业大学
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Priority to CN2011101331440A priority Critical patent/CN102155260B/en
Publication of CN102155260A publication Critical patent/CN102155260A/en
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Abstract

The invention discloses a method for filling a heavy-pitch coal bed goaf, comprising the following steps: firstly, arranging a grouting pump and a belt conveyor for transporting gangues in an upper roadway on a heavy-pitch direction long-wall coal face; every time the coal face is forwards pushed for 1.2-1.8m, arranging a grouting pipe on the top plate of a strut at the last row; after the coal face is pushed for 3-5m, stopping pushing; arranging air cushions along the strut at the last row on the whole coal face except the upper roadway; filling a gas to cause the air cushions to expand; communicating the grouting pipe on a goaf top plate sealed by the air cushions with the grouting pump; transporting the gangue to the upper tip of the coal face to cause the gangue to automatically slide to the goaf; after the goaf sealed by the air cushions is filled with the gangues, stopping transporting; then, grouting into the goaf to cause the gangues to be fully cemented; stopping grouting, removing the air cushions, and forwards pushing the coal face; and repeating the above steps until the whole goaf is filled. The method is convenient to operate and simple to construct. After the gangues are filled, the possibility of sinking for the top plate can be lowered, the gangues can be reused, and the cost on processing the gangues is lowered.

Description

A kind of half-edge coal seam goaf filling method
Technical field
The present invention relates to coal mine gob filling technique field, be particularly useful for stable roof, and adopt general adopt or the half-edge coal seam of high-grade conventional mining technology moves towards the longwell stope.
Background technology
Railways and water-bodies becomes a pith of coal resources in China exploitation day by day.Filling mining has wide application prospect in railways and water-bodies, be the method that the most effectively prevents to crush and destroy, and is one of developing direction of the green exploitation in colliery.In addition, it is the topmost environmental problem root of Coal Production that open-air discharging of gangue and surface subsidence destroy, and is the key factor that influences mining area economic development and social stability.Very few for the research of high-dipping (more than 45 °) coal seam goaf filling technique at present; And the way as the one of which is to adopt to divide band to face upward oblique coal-mining method; In next working face extraction on the goaf of a work plane carry out spoil from slipping filling, or in this working face extraction, carry out spoil from slipping filling, but all not withdrawing prop, not cavings; Bigger to the pillar consumption, and can not guarantee the stable of goaf top plate.And the present invention carries out spoil from slipping filling in this working face extraction; Back production and filling hocket; And withdrawing prop; Reduced the consumption of pillar, not only can prevent effectively that the sinking of goaf top plate from destroying, and can realize that spoil does not go out well and handles ground hillock occupation of land and pollution problem.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, provide a kind of method simple, easy to operate half-edge coal seam goaf filling method.
Technical scheme: half-edge coal seam goaf filling method of the present invention, step is following:
A. at first half-edge coal seam move towards the longwall mining work plane on lay grouting pump and the ribbon conveyer that transports spoil in the crossheading;
When b. stope is whenever pushed ahead 1.2~1.8m; On the top board at row's pillar place, end, being laid with interconnective diameter along the work plane incline direction successively is that 1 inch, length are the Grouting Pipe of 3 ~ 5m; Evenly arrange 2 ~ 5 groups of injected holes on the external diameter of each Grouting Pipe; After treating that stope advances 3 ~ 5m, stop to advance;
C. laying length from the bottom up successively along end row's pillar of whole stope except that last crossheading is 3 ~ 5m, the wide 1.5 ~ 2.5m of being, highly is the air cushion of 1.1 ~ 1.3 times of mining heights;
D. charged pressure is that the gas of 0.5MPa fully expands air cushion in air cushion, forms the air cushion partition wall that flows back between mining face and the goaf, and the air cushion partition wall leaves the passage that transports attal and laying grouting pipeline at last crossheading place;
E. Grouting Pipe and the grouting pump that is located in the crossheading are linked;
F. through the ribbon conveyer in the last crossheading spoil is transported to the passway of air cushion partition wall at last crossheading, makes spoil in the goaf that slips to by the sealing of air cushion partition wall, carry out filling;
When treating that g. spoil is full of the goaf of being sealed by the air cushion partition wall; Stop to transport spoil; To the goaf injection pressure slurries of 4 ~ 6MPa through Grouting Pipe then; Make to be filled in together, remove air cushion after slip casting is accomplished, accomplish the circulation of a back production and filling by the abundant gluing of spoil in the goaf of air cushion partition wall sealing;
H. work plane begins to push ahead, and repeating step b.c.d.e.f.g accomplishes the circulation of next back production and filling, goes round and begins again, until accomplishing whole back production and filling operation.
Described every group of injected hole is 4, along Grouting Pipe circumferential direction symmetric arrangement.
Beneficial effect: owing to adopted technique scheme, adopt the airtight goaf of air cushion, the characteristics according to half-edge coal seam make spoil from slipping into capable filling then; The sinking that has prevented goaf top plate effectively destroys, and back production and filling through this coal work plane hocket, and have improved production efficiency greatly; Can spoil directly be utilized simultaneously; Alleviate the pressure of spoil transportation, lifting, reduced the expense of floor treatment spoil, and the pollution that alleviated spoil.Its method is simple, easy to operate, filling effect is good, in the present technique field, has practicality.
Description of drawings
Fig. 1 is a sketch map of the present invention.
Among the figure: the last crossheading of 1-, crossheading under the 2-, the 3-grouting pump, the 4-ribbon conveyer, the 5-Grouting Pipe, the 6-air cushion, 7-end row's hydraulic prop, 8-is the goaf of filling.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are done further to describe:
Half-edge coal seam goaf filling method of the present invention, at first half-edge coal seam move towards the longwall mining work plane on lay high percentage of water rapid solidifying material grouting pump 3 and the ribbon conveyer 4 that transports spoil in the crossheading 1; When stope is whenever pushed ahead 1.2~1.8m; On the top board at row's pillar 7 places, end, laying interconnective diameter along the work plane incline direction successively is that 1 inch, length are the Grouting Pipe 5 of 3m; Evenly arrange 3 groups of injected holes on the external diameter of each Grouting Pipe 5, every group of injected hole is 4, along Grouting Pipe circumferential direction symmetric arrangement; After treating that stope is pushed ahead 3.6m, stop to advance; Along end row's pillar 7 of whole stope except that last crossheading 1 lay successively from the bottom up long for 3m, wide be 2m, highly be the air cushion 6 of 1.2 times of mining heights; Charged pressure is that the gas of 0.5MPa fully expands air cushion 6 in air cushion 6, forms the air cushion partition wall that flows back between mining face and the goaf.The air cushion partition wall leaves at last crossheading 1 place and transports attal and the passage of laying grouting pipeline; Grouting Pipe 5 and the high percentage of water rapid solidifying material grouting pump 3 that is located in the crossheading 1 are linked; Through the ribbon conveyer 4 in the last crossheading 1 spoil is transported to the passway of air cushion partition wall at last crossheading 1, makes spoil in the goaf that slips to by the sealing of air cushion partition wall, carry out filling; When treating that spoil is full of the goaf of being sealed by the air cushion partition wall; Stop to transport spoil; Be the high percentage of water rapid solidifying material of 6MPa through Grouting Pipe 6 to the goaf injection pressure then, make to be filled in together, form the goaf 8 of filling after slip casting is accomplished by the abundant gluing of spoil in the goaf of air cushion partition wall sealing; Remove air cushion 6, accomplish the circulation of a back production and filling; Along with pushing ahead of work plane, repeat the cyclic process of a back production and filling, accomplish next back production and filling circulation, go round and begin again, until accomplishing whole back production and filling operation.

Claims (2)

1. a half-edge coal seam goaf filling method is characterized in that comprising the steps:
A. at first half-edge coal seam move towards the longwell stope on lay grouting pump (3) in the crossheading (1) and transport the ribbon conveyer (4) of spoil;
When b. stope is whenever pushed ahead 1.2~1.8m; Arrange at the end along the stope incline direction that to be laid with interconnective diameter successively on the top board that pillar (7) locates be that 1 inch, length are the Grouting Pipe (5) of 3 ~ 5m; Evenly arrange 2 ~ 5 groups of injected holes on the external diameter of each Grouting Pipe (5); After treating that stope advances 3 ~ 5m, stop to advance;
C. along end row's pillar (7) of whole stope except that last crossheading (1) from the bottom up successively laying length be 3 ~ 5m, the wide 1.5 ~ 2.5m of being, highly be the air cushion (6) of 1.1 ~ 1.3 times of mining heights;
D. charged pressure is that the gas of 0.5MPa fully expands air cushion (6) in air cushion (6); The air cushion partition wall that formation one flows back between mining face and the goaf, air cushion partition wall locate to leave the passage that transports attal and laying grouting pipeline at last crossheading (1);
E. Grouting Pipe (5) and the grouting pump (3) that is located in the crossheading (1) are linked;
F. through the ribbon conveyer (4) in the last crossheading (1) spoil is transported to the passway of air cushion partition wall in last crossheading (1), makes spoil in the goaf that slips to by the sealing of air cushion partition wall, carry out filling;
When treating that g. spoil is full of the goaf of being sealed by the air cushion partition wall; Stop to transport spoil; To the goaf injection pressure slurries of 4 ~ 6MPa through Grouting Pipe (5) then; Make to be filled in together, remove air cushion (6) after slip casting is accomplished, accomplish the circulation of a back production and filling by the abundant gluing of spoil in the goaf of air cushion partition wall sealing;
H. stope begins to push ahead, and repeating step b.c.d.e.f.g accomplishes the circulation of next back production and filling, goes round and begins again, until accomplishing whole back production and filling operation.
2. half-edge coal seam goaf filling method according to claim 1 is characterized in that: described every group of injected hole is 4, along Grouting Pipe (5) circumferential direction symmetric arrangement.
CN2011101331440A 2011-05-23 2011-05-23 Method for filling heavy-pitch coal bed goaf CN102155260B (en)

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CN102155260B true CN102155260B (en) 2012-11-28

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Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
CN102507246B (en) * 2011-11-03 2013-12-18 中国地质大学(武汉) Experimental tank for testing performance of grouting while drilling
CN102493838B (en) * 2011-12-17 2014-01-15 湖南科技大学 Method for fully mechanized continuously-filling coal mining of steeply pitching coal seam
CN102536239B (en) * 2012-01-06 2014-03-26 何满潮 Long-wall working face coal pillar-free mining method
CN102967687B (en) * 2012-11-07 2015-05-06 北京交通大学 Indoor fracturing grouting experiment system under bidirectional anisobaric condition
CN103498696B (en) * 2013-10-02 2015-08-05 中国矿业大学 A kind of method from roadway in the roof grouting filling compacting goaf filling body
CN103758567B (en) * 2014-01-26 2016-02-03 山东科技大学 A kind of breaking roof Collapsed zone grouting filling method
CN103758569B (en) * 2014-01-26 2016-01-06 山东科技大学 A kind of breaking roof Collapsed zone grouting filling system
CN105909247A (en) * 2016-04-26 2016-08-31 西南科技大学 Non-pillar sublevel mining cemented filling mining method
CN105971608A (en) * 2016-06-27 2016-09-28 六盘水师范学院 Thick-coal-seam large-mining-height gob-side roadway retaining method
CN108547658B (en) * 2018-03-20 2019-06-18 四川省安全科学技术研究院 A kind of high inclination-angle ultra-thin coal seam spoil is from slipping backfilling goaf method
CN108625894B (en) * 2018-06-25 2020-04-17 山东科技大学 Waste rock filling three-dimensional grouting construction method for horizontal working face of short-wall roadway mining

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