CN112593940A - Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method - Google Patents
Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method Download PDFInfo
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- CN112593940A CN112593940A CN202011487523.5A CN202011487523A CN112593940A CN 112593940 A CN112593940 A CN 112593940A CN 202011487523 A CN202011487523 A CN 202011487523A CN 112593940 A CN112593940 A CN 112593940A
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- 239000003245 coal Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000005065 mining Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000010878 waste rock Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000005641 tunneling Effects 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/14—Air partitions; Air locks
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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
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Abstract
The invention discloses an arrangement process for treating ground gangue and a coal pillar left by a stope room coal mining method, which is suitable for recovering the coal pillar left after the stope room coal mining method is adopted in a coal mine and treating the ground gangue. The method comprises the steps of firstly, hanging a wind-shielding curtain between adjacent coal pillars outside the coal pillars to form an air inlet and return system for normal extraction, then partitioning a left coal room and the coal pillars, sealing the coal room between room-type coal pillars by adopting a baffle plate, and finally, densely filling the space formed by the baffle plate and the coal pillars by adopting a paste filling material. And after the adjacent filling paste bodies are solidified, adopting a continuous miner or a heading machine to recover the coal pillars between the two adjacent paste bodies. And after the coal pillar is completely mined, filling the mining space with gangue by using a gangue throwing machine. The process not only realizes the recovery of the left coal pillars in the room coal mining method, but also reduces the accumulation and discharge of ground gangue, and the filled paste and the gangue can act synergistically to jointly control the collapse of the overlying rock stratum, thereby realizing the control of the ground subsidence.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to an arrangement process for processing residual coal pillars and ground gangue by a stope type coal mining method, which is mainly suitable for a mine mined by the stope type coal mining method.
Background
With the high-intensity mining of coal resources in China, shallow resources are gradually exhausted, the mining depth of coal mines is increased year by year, and the mining depth of many mines exceeds 1000 m. In the mining process of the shallow coal resources, because the mechanization degree is lower at that time, the prevention and control technology for roof disasters is relatively backward, and many mines adopt a room-type coal mining method to carry out the extraction of the shallow resources. The method is mainly characterized in that a series of coal rooms with the width of 5-7 m are arranged in a coal seam, a narrow working face is formed during mining, and the method is similar to roadway tunneling. Then, coal pillars with certain width are reserved between the coal rooms, and a connecting roadway is adopted to run through two adjacent coal rooms at a certain distance, so that a complete production system is formed, and the left coal pillars are used for supporting the top plate, so that the occurrence of roof disaster is reduced. The method has obvious effects on relieving mine pressure appearance, reducing occurrence of roof disaster accidents and the like, but the coal pillar resource quantity left in the room type goaf is large, and according to statistics, the coal resource extraction rate of the room type coal mining method is less than 40%. And along with the exploitation of lower group coal, the coal pillars left in the overlying goaf also have great influence on the exploitation of the lower coal seam, and the phenomena of abnormal ore pressure appearance, large-area cutting of the top plate along the coal wall, large shrinkage of the support movable pillar, frequent opening of the safety valve and the like occur in the coal seam passing through the coal pillars left in the upper coal seam in a plurality of coal seams under the mine, even the problems of frame pressing and the like occur in individual mines, particularly in the short-distance coal seam. Meanwhile, with the macroscopic control of the state on coal resources, the requirements of deep coal resource mining approval are getting tighter and tighter, and many mines with lower yield face the problems of resource exhaustion and coal-free mining, so that coal pillars left in a goaf after a room-type coal mining method is adopted in the past need to be recovered, the service life of the mine is prolonged, the waste of the coal resources is reduced, meanwhile, ground gangue is filled into the underground goaf, the mine pressure display degree is relieved, the gangue treatment cost is reduced, the influence of gangue discharge on the surrounding environment is reduced, and the safe, efficient and green mining of the coal resources is realized.
Disclosure of Invention
The arrangement process for the coal pillar left by the stope coal mining method and the ground gangue treatment is provided, aiming at the problems of resource waste, influence on the safe mining of the lower coal seam, prolonging the service life of a mine with resource exhaustion and the like caused by the coal pillar left by the stope coal mining method.
The invention is realized by adopting the following technical scheme:
an arrangement process for remaining coal pillars and processing ground gangue by a stope coal mining method comprises the following steps:
a. at first hang the air blocking curtain between the adjacent two pillars in the room formula collecting space area outside, guarantee to form complete air inlet and return air system, wherein the system during tunnelling working face or continuous miner working face stoping includes: an air inlet drift also serves as a transportation drift, a boundary air guide drift and an air return drift also serve as an auxiliary transportation drift;
b. according to a ventilation system formed by a driving working face or a working face of a continuous miner, dividing coal pillars and coal rooms in a room type goaf into partitions 1, 2, 3 … … n-6, n-7 and n-8 which are parallel to a boundary air guide tunnel along the direction of an air inlet roadway and a transportation roadway, wherein the partition thickness is the width of the coal pillars and the coal rooms;
c. sealing coal rooms between adjacent room type coal pillars in the subarea 2 by adopting a baffle, building a wall body at the connecting position of the subarea 2 and a return air drift and auxiliary transportation drift and an air inlet drift and transportation drift, filling the subarea 2 by adopting a paste filling method, and ensuring that a filling body is connected with the top;
d. repeating the steps to fill the paste at the positions of the subareas 4, 6 and 8 … … to form filled paste;
e. after the paste bodies of the two adjacent paste body filling subareas are solidified, the subareas 3, 5 and 7 … … coal pillars at the middle positions of the two paste bodies are sequentially mined, meanwhile, the baffle plates between the adjacent coal pillars are recovered, wherein the mined coal pillar resources are transported to a main transportation main roadway through an air inlet roadway and a transportation roadway and then are lifted to the ground;
f. and sequentially building the wall at the interactive positions of the mined subareas 3, 5 and 7 … … coal pillars and an air inlet drift and a transportation drift, transporting the gangue washed on the ground to an air return drift and an auxiliary transportation drift by using a belt, and filling the gangue into spaces formed after the subareas 3, 5 and 7 … … coal pillars are mined by using a gangue throwing machine to form the filled gangue.
The invention is further improved in that the coal pillar is a room-type coal pillar.
The further improvement of the invention is that in the step e, a continuous miner or a comprehensive mechanized heading machine is adopted to sequentially recover the subareas 3, 5 and 7 … … coal pillars in the middle positions of the two pastes.
The invention is further improved in that the width of the room-type coal pillar is 20 m.
The invention is further improved in that the width of the coal room is 5-7 m.
The invention is further improved in that in the step f, a gangue throwing machine is adopted to fill gangue into the space formed after the coal pillars of the subareas 3, 5 and 7 … … are mined.
The invention has at least the following beneficial technical effects:
the system provided by the invention is simple to operate, can realize the complete recovery of the room-type coal pillar, and can fill the goaf with ground gangue, thereby not only improving the resource extraction rate, but also reducing the accumulation and discharge of the ground gangue to a certain extent, slowing down the influence of the gangue on the surrounding environment, and responding to the call of the state on underground filling treatment of the gangue. Compared with a room type coal pillar left goaf, the process can realize the recovery of coal pillar resources, prolong the service life of a mine, and can treat the waste rocks on the ground, and the part of coal resources are mined back by adopting a filling method, so that the tax revenue can be reduced and the capacity can be replaced according to the national policy, and the comprehensive benefit is remarkable.
Drawings
FIG. 1 is a schematic illustration of a face of the present invention prior to mining a coal pillar in a room;
FIG. 2 is a diagram of a production process in a mining room coal pillar according to the present invention;
FIG. 3 is a subsequent view of the present invention based on the production process of FIG. 2;
FIG. 4 is a graph showing the results of mining a coal pillar in a room according to the present invention.
Description of reference numerals:
the method comprises the following steps of 1-air inlet drift and transportation drift, 2-air return drift and auxiliary transportation drift, 3-boundary air guide drift, 4-coal pillar, 5-coal room, 6-baffle, 7-air blocking curtain, 8-masonry wall, 9-filled paste, 10-tunneling working face or continuous miner working face and 11-filled gangue.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
The invention provides an arrangement process for remaining coal pillars and processing ground gangue by a stope-type coal mining method, which comprises the following steps:
a. the arrangement of the coal pillar and the coal room before the mining of the room coal pillar 4 is shown in fig. 1. Firstly, a wind screen 7 is hung between two adjacent coal pillars outside a room type goaf to form a complete air inlet and return system, meanwhile, an air inlet gallery and a transportation gallery 1 are used as a transportation gallery in the room type coal pillar recovery period, a return air gallery and an auxiliary transportation gallery 2 are used as an auxiliary transportation gallery in the room type coal pillar recovery period, and a boundary air guide gallery 3 is used for communicating the air inlet and return air gallery and the auxiliary transportation gallery 2.
b. According to a ventilation system formed by a heading face or a continuous miner face 10, according to the space relation of an air inlet roadway and an air return roadway, a room type coal pillar 4 and a coal room 5 are divided into a plurality of partitions parallel to a boundary air guide roadway 3 along the direction of the air inlet roadway, the partitions are sequentially numbered from right to left (1, 2 and 3 … …), and the partition thicknesses are respectively the width of the room type coal pillar 4 and the width of the coal room 5.
c. The method comprises the steps of sealing coal rooms 5 between adjacent room type coal pillars in a subarea 2 by using a baffle 6, building a wall 8 at the connecting position of the subarea 2 and a return air drift and a transportation drift, filling the subarea 2 by using a paste filling method, and ensuring that a filling body is closely connected with a roof, wherein a paste pipeline is arranged in the air inlet drift and the transportation drift 1.
d. And c, repeating the step c, and sequentially filling paste bodies at the positions of the coal room partitions and the like to form filled paste bodies 9.
e. According to the solidification time of the paste bodies, after the paste bodies of the two adjacent paste bodies filled in the subareas reach certain strength, the subarea coal pillars at the middle positions of the two paste bodies are sequentially mined by a continuous miner or a comprehensive mechanical heading machine, and meanwhile, the baffle 6 between the adjacent coal pillars 4 is recovered. The process can realize parallel paste filling of coal room partitions and coal pillar mining of room type coal pillar partitions at the later stage, and improve the working efficiency of coal pillar mining.
f. And sequentially building a wall body at the interaction positions of the mined coal pillar partition and the air inlet gallery and the transportation gallery 1, transporting the waste rock washed and sorted on the ground to the auxiliary transportation gallery by adopting a belt, and filling the waste rock into a space formed after the mining of the partitioned coal pillar by using a waste rock throwing machine, wherein the belt for transporting the waste rock is arranged in the air return gallery and the auxiliary transportation gallery 2. The process can realize parallel operation of paste filling of coal room subareas, coal pillar mining of coal pillar subareas and gangue filling after coal pillar subareas are mined at the later stage to form filled gangue 11.
Claims (6)
1. An arrangement process for remaining coal pillars and processing ground gangue by a stope coal mining method is characterized by comprising the following steps:
a. at first hang between two adjacent pillars in room formula collecting space area outside and keep off air curtain (7), guarantee to form complete air inlet and return air system, wherein the system during tunnelling working face or shearer working face (10) stoping includes: an air inlet drift and transportation drift (1), a boundary air guide drift (3) and a return air drift and auxiliary transportation drift (2);
b. according to a ventilation system formed by a driving working face or a working face (10) of a continuous miner, a coal pillar (4) and a coal room (5) in a room type goaf are divided into partitions 1, 2, 3 … … n-6, n-7 and n-8 which are parallel to a boundary air guide roadway (3) along the direction of an air inlet roadway and a transportation roadway (1), and the partition thickness is the width of the coal pillar (4) and the coal room (5);
c. sealing coal rooms (5) between adjacent room type coal pillars in the subarea 2 by adopting a baffle (6), building a wall body (8) at the connecting position of the subarea 2, an air return drift and auxiliary transportation drift (2) and an air inlet drift and transportation drift (1), filling the subarea 2 by adopting a paste filling method, and ensuring that a filling body is connected with the top;
d. repeating the steps to fill the paste in the positions of the subareas 4, 6 and 8 … … to form a filled paste (9);
e. after the paste bodies of the two adjacent paste body filling subareas are solidified, the subareas 3, 5 and 7 … … coal pillars at the middle positions of the two paste bodies are mined in sequence, and meanwhile, the baffle plates (6) between the adjacent coal pillars (4) are recovered, wherein the mined coal pillar resources are transported to a main transportation main roadway through an air inlet roadway and a transportation roadway (1) and then lifted to the ground;
f. and sequentially building a wall body (8) at the interaction positions of the mined subareas 3, 5 and 7 … … coal pillars and the air inlet drift and transportation drift (1), transporting the gangue washed on the ground to the air return drift and auxiliary transportation drift (2) by using a belt, and filling the gangue into spaces formed after the subareas 3, 5 and 7 … … coal pillars are mined by using a gangue throwing machine to form filled gangue (11).
2. The arrangement process for remaining coal pillars and treating ground gangue in a stope coal mining method according to claim 1, wherein the coal pillars (4) are house coal pillars.
3. The arrangement process for remaining coal pillars and processing ground gangue in the stope coal mining method according to claim 1, wherein in the step e, a continuous miner or a comprehensive mechanized heading machine is adopted to sequentially stope the coal pillars of 3, 5 and 7 … … in the middle of the two paste bodies.
4. The arrangement process for the pillar and the surface gangue treatment in the stope coal mining method according to claim 1, wherein the width of the chamber pillar (4) is 20 m.
5. The arrangement process for remaining coal pillars and processing ground gangue by the stope coal mining method according to claim 1, wherein the width of the coal room (5) is 5-7 m.
6. The arrangement process for remaining coal pillars and processing ground gangue according to the stope coal mining method of claim 1, wherein in the step f, a gangue throwing machine is adopted to fill gangue into spaces formed after the coal pillars of the subareas 3, 5 and 7 … … are mined.
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| CN202011487523.5A CN112593940A (en) | 2020-12-16 | 2020-12-16 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
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| CN202011487523.5A CN112593940A (en) | 2020-12-16 | 2020-12-16 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
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Cited By (4)
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| CN114033482A (en) * | 2021-09-10 | 2022-02-11 | 滕州郭庄矿业有限责任公司锦丘煤矿 | Ventilation method based on large-step-distance filling of coal face |
| CN114215592A (en) * | 2021-11-30 | 2022-03-22 | 中国矿业大学 | Green mining method for filling gangue and ultrahigh water material on longwall working face |
| CN114687794A (en) * | 2022-03-31 | 2022-07-01 | 中国矿业大学(北京) | Coal mine filling and re-mining method |
| WO2024082011A1 (en) * | 2022-10-19 | 2024-04-25 | Gazmick Pty Ltd | Method of mining in underground mines including disposal of tailings |
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| CN114687794A (en) * | 2022-03-31 | 2022-07-01 | 中国矿业大学(北京) | Coal mine filling and re-mining method |
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Application publication date: 20210402 |