CN111946393B - Coal mining system and method for overlong solid filling working face - Google Patents
Coal mining system and method for overlong solid filling working face Download PDFInfo
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- CN111946393B CN111946393B CN202010841559.2A CN202010841559A CN111946393B CN 111946393 B CN111946393 B CN 111946393B CN 202010841559 A CN202010841559 A CN 202010841559A CN 111946393 B CN111946393 B CN 111946393B
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- 239000003245 coal Substances 0.000 title claims abstract description 126
- 238000005065 mining Methods 0.000 title claims abstract description 99
- 239000007787 solid Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 239000002910 solid waste Substances 0.000 claims abstract description 12
- 239000010878 waste rock Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 241001149900 Fusconaia subrotunda Species 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000010883 coal ash Substances 0.000 abstract 1
- 230000001174 ascending effect Effects 0.000 description 6
- 239000010881 fly ash Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21F15/06—Filling-up mechanically
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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
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a coal mining system and a method for an ultra-long solid filling working face, which specifically comprise the following steps: three roadways are excavated in the coal seam, and the middle roadway is positioned in the middle of the working face to form a W-shaped ventilation mode of 1 in and 2 out or 2 in and 1 out; arranging two porous bottom-discharge scraper conveyors in a working face, and adopting a solid filling coal mining method to carry out stoping on coal resources; the length of the filling working face is 200-300 m, which is 2 times of the length of the existing common solid filling coal mining working face, and in the working face stoping process, a roadway on one side of the filling working face is reserved by adopting a gob-side entry retaining technology and is used as a stoping roadway of the next ultra-long solid filling coal mining working face. The invention gives full play to the characteristics of solid filling coal mining and roadway optimized arrangement, reduces the moving times of the working face, the labor intensity and the gob-side entry retaining length, effectively treats solid wastes such as waste rock, coal ash and the like, and realizes the efficient and safe mining of coal resources.
Description
Technical Field
The invention relates to the technical field of coal seam mining and solid waste disposal, in particular to a coal mining system and a method for an ultra-long solid filling working face, and the coal mining system and the method are particularly suitable for efficient filling mining of coal seams.
Background
In recent years, the development concept that the green water mountain is the Jinshan Yinshan is continuously and deeply mastered, and green mining of coal resources is trendy and is a necessary choice for sustainable development of the coal industry. Since research and development, comprehensive mechanized solid filling coal mining is successfully applied under the conditions of 'three lower' coal compaction and special mining geology in more than twenty mining areas in China, and a large amount of mining area solid wastes such as gangue and fly ash are treated while a large amount of coal resources are liberated. However, due to the limitations of the existing solid filling coal mining technology and filling coal mining equipment, the upper limit of the length of the multi-hole bottom-discharge scraper conveyor at the rear part of the filling coal mining hydraulic support is generally 150m, and the working length of the solid filling coal mining is generally below 150 m. Therefore, the coal production capacity of a single solid filling coal face is limited, the disposal capacity of solid wastes such as waste rock and fly ash in a goaf is low, the gob-side entry retaining length, the number of times of moving the face, the labor intensity and the like are increased in the filling coal mining process, and the high yield and the high efficiency of the single face are influenced. In order to solve the technical bottleneck problems existing in the prior stage, the mining geological conditions are better, the method is suitable for arranging the conditions of the ultra-long solid filling coal face, how to develop the coal face mining system and the method of the ultra-long solid filling coal face are to ensure that the high yield and the high efficiency of the coal face are ensured, and the requirement of the high-efficiency filling of the solid wastes in the mining area is met to become the problems of some modern mines.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a coal mining system and method for an ultra-long solid filling working face, and aims to solve the problem of efficient filling mining of a single solid filling working face.
The technical scheme is as follows: in order to achieve the purpose, the invention discloses a coal mining system and a method for an ultra-long solid filling working face.
A kind of overlength solid fills the coal mining system of the working face, dig in three roadways in the coal seam, the middle lane locates at the middle position of the working face, the upper and lower two lanes are the same in function, the upper and lower lane and middle lane are used as the air inlet lane of coal transportation or transporting the waste rock and returning to the air tunnel alternatively, form "W" type 1 enters 2 and returns or 2 and 1 returns the ventilation mode; two porous bottom-discharge scraper conveyors are arranged at the rear part of the working face filling hydraulic support, and a solid filling coal mining method is adopted to carry out stoping on coal resources.
Furthermore, 2 multi-hole bottom discharge type conveyors are arranged at the rear part of the solid filling coal mining hydraulic support, and the total length of the working face is 200-300 m. Is 2 times of the length of the prior common solid filling coal face
Further, the W-shaped 1-in-2-return ventilation mode specifically comprises: the middle lane is a coal transporting air inlet lane, and the upper lane and the lower lane are a waste rock transporting air return upper lane and a waste rock transporting air return lower lane respectively; 2 scraper conveyors are arranged at the front part of the filling hydraulic support, and filling waste rocks are conveyed from two sides of the working face to the middle after entering a goaf behind the working face.
Further, the W-shaped 2-in-1-return ventilation mode specifically comprises: the middle lane is a gangue conveying return air lane, the upper lane and the lower lane are a coal conveying air inlet upper lane and a coal conveying air inlet lower lane respectively, and the filled gangue is conveyed from the middle of the working face to two sides after entering a goaf behind the working face.
Further, a W-shaped 2-in 1-return ventilation mode is adopted, the middle lane is used as a gangue conveying return air lane, and when an upper lane and a lower lane are simultaneously adopted and used as coal conveying air inlet lanes, 2 scraper conveyors are arranged at the front part of the filling hydraulic support; when the upper and lower lanes or one side of the upper and lower lanes are used as coal-conveying air-inlet lanes, 1 part of scraper conveyer is arranged at the front part of the coal-conveying air-inlet lane.
Furthermore, the W-shaped 1-in-2-return ventilation mode mainly uses high-efficiency filling of solid wastes and uses coal mining as an auxiliary mode. The method is generally applied to the conditions that the solid wastes such as the waste rocks and the fly ash on and off the mine shaft in the mining area have sufficient sources and need to be treated in large quantity, the filling effect is required to be high and the like, and the filling of the solid wastes is mainly performed.
Furthermore, the W-shaped 2-in-1-return ventilation mode mainly uses high-efficiency coal mining on the working face and uses filling as auxiliary. The ventilation mode is generally applied to the conditions of rapid disposal of solid wastes such as waste rocks and fly ash on and off a mine shaft in a mining area, low requirement on filling effect and the like, and mainly aims at mining coal on a working face.
The invention also discloses a coal mining method for the overlong solid filling working face, which comprises the following steps:
a. arranging a return air ascending mountain and a transportation ascending mountain in a mining section, then tunneling three roadways of an ultra-long solid filling working face in a coal seam, wherein a middle roadway is positioned in the middle of the working face, and after digging and cutting holes, the middle roadway and an upper roadway and a lower roadway are alternately used as a coal transporting air inlet roadway or a gangue transporting air return roadway to form a W-shaped ventilation system with 1 inlet and 2 return or 2 inlet and 1 return;
b. filling coal mining equipment including a coal mining hydraulic support, a coal mining machine, a front scraper conveyor and a rear porous bottom-dump conveyor is arranged in the working face to form a complete production system;
c. adopting a backward filling coal mining operation, and sequentially finishing the working procedures including coal cutting, frame moving, pushing and sliding and filling on a working face;
d. in the process of advancing the working face, constructing a roadside filling body at one side of a lower roadway of the section to finish the gob-side entry retaining operation;
e. and c, repeating the steps c to d until the mining operation of the whole working face is completed.
Has the advantages that: compared with the prior art, the coal mining method for the overlong solid filling working face has the following advantages: the total length of the filling working face is 200-300 m, which is 2 times of the length of the existing common solid filling coal mining working face, the coal mining and filling capacity of a single solid filling coal mining working face is effectively improved, the increase of gob-side entry retaining length, the number of times of moving the working face, the labor intensity and the like in the filling coal mining process is greatly reduced, and the method has a wide application prospect.
Drawings
FIG. 1 is a plan view of a W-shaped 1-in 2-back ventilation working face arrangement of a coal mining system of an ultra-long solid filling working face.
FIG. 2 is a plan view of the arrangement of a W-shaped 2-in 1-return ventilation working face of the coal mining system of the ultra-long solid filling working face.
FIG. 3 is a cross-sectional view of a working face of the coal mining method of the ultra-long solid filling working face.
In the figure: 1-returning air to the upper mountain, 2-transporting the upper mountain, 3-goaf filling material, 4-roadside filling body, 5-transporting gangue to the upper tunnel, 6-transporting coal to the middle tunnel, 7-transporting gangue to the lower tunnel, 8-solid filling coal mining hydraulic support, 9-stopping mining line, 10-transporting coal to the upper tunnel, 11-transporting gangue to the middle tunnel, 12-transporting coal to the lower tunnel, 13-coal mining machine, 14-scraper conveyor, 15-porous bottom discharge type conveyor, 16-tamping mechanism.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention as follows:
the first embodiment is as follows:
the mining depth of a main mining coal seam at a certain mining stage reaches-500 m, the average thickness of the coal seam is 3.5m, the average thickness of a nearly horizontal coal seam is 1.5m at the direct top, mainly gray mudstone, 4.5m at the basic top, mainly sandstone, 2.0m at the direct bottom and mainly gray and black mudstone. According to the mining geological conditions of mines, the disposal capacity of solid wastes in mining areas and the rock stratum movement control effect are combined, the length of an ultra-long solid filling coal face is designed to be 300m (two conveyors are 150m +150m, namely 300m), the advancing length of the face is 2100m, and the layout of mining area roadways is shown in figure 1.
a. Arranging an air return ascending mountain (1) and a transportation ascending mountain (2) in a mining section, and then tunneling three roadways of an overlong solid filling working face in a coal seam: the coal-conveying air-inlet middle lane (6) is positioned in the middle of the working face, and a W-shaped ventilation system with 1 inlet and 2 return is formed after digging and cutting holes;
b. key filling coal mining equipment such as a solid filling coal mining hydraulic support (8), a coal mining machine (13), a front scraper conveyor (14), a rear porous bottom-dump conveyor (15) and the like are arranged in the overlong solid filling working face to form a complete production system;
c. adopting a backward filling coal mining operation, and sequentially completing the working procedures of coal cutting, frame moving, pushing, sliding, filling and the like on an overlong solid filling working face;
d. along with the forward advance of the ultra-long solid filling coal mining working face, a roadside filling body (4) is constructed on one side of a section roadway (7) to finish the operation of gob-side entry retaining;
e. and c, repeating the steps c to d until the mining operation of the whole ultra-long solid filling coal face is completed.
In the first embodiment, the ultra-long solid filling coal face mainly adopts dense filling and assists coal mining, and the disposal capacity of solid waste in a goaf can reach more than 350 ten thousand t/a;
example two:
the mining depth of a main mining coal seam at a certain mining stage reaches-1000 m, the average thickness of the coal seam is 3.0m, the average dip angle is 9 degrees, the average thickness of a direct roof is 2.0m, the main mining coal seam is mainly sandy mudstone, the average thickness of the basic roof is 4.0m, the main mining coal seam is mainly siltstone, the average thickness of a direct bottom is 1.5m, and the main mining coal seam is mainly gray mudstone. According to the mining geological conditions of a mine, the production capacity of the mine and the requirement of no lifting of underground gangue separation are combined, the length of an ultra-long solid filling coal face is designed to be 300m (two conveyors are 150m +150m, namely 300m), the advancing length of the face is 2500m, and the layout of a mining area roadway is shown in fig. 2.
a. Arranging an air return ascending mountain (1) and a transportation ascending mountain (2) in a mining section, and then tunneling three roadways of an overlong solid filling working face in a coal seam: the coal conveying air inlet upper lane (10), the gangue conveying air return middle lane (11) and the coal conveying air inlet lower lane (12), wherein the gangue conveying air return middle lane (11) is positioned in the middle of the working face, and a W-shaped 2-inlet 1-return ventilation system is formed after excavation and hole cutting;
b. key filling coal mining equipment such as a solid filling coal mining hydraulic support (8), a coal mining machine (13), a front scraper conveyor (14), a rear porous bottom-dump conveyor (15) and the like are arranged in the overlong solid filling working face to form a complete production system;
c. adopting a backward filling coal mining operation, and sequentially completing the working procedures of coal cutting, frame moving, pushing, sliding, filling and the like on an overlong solid filling working face;
d. along with the forward advance of the ultra-long solid filling coal mining working face, a roadside filling body (4) is constructed on one side of a section roadway (12) to finish the operation of gob-side entry retaining;
e. and c, repeating the steps c to d until the mining operation of the whole ultra-long solid filling coal face is completed.
In the second embodiment, the working face of the ultra-long solid filling coal mining mainly adopts high-efficiency coal mining and adopts filling as assistance, and the productivity of the working face can reach more than 300 ten thousand t/a;
the above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (3)
1. The utility model provides a super long solid filling working face coal mining system which characterized in that: three roadways are tunneled in the coal bed, the middle roadway is positioned in the middle of the working face, the functions of the upper roadway and the lower roadway are the same, and the upper roadway and the lower roadway and the middle roadway are alternately used as a coal transporting air inlet roadway or a gangue transporting air return roadway to form a W-shaped ventilation mode of 1 in 2 return or 2 in 1 return; two multi-hole bottom-discharge conveyors are arranged at the rear part of the working face filling hydraulic support, and a solid filling coal mining method is adopted to carry out stoping on coal resources;
2 porous bottom-discharge conveyors (15) are arranged at the rear part of the solid filling coal mining hydraulic support (8), and the total length of the working face is 200-300 m;
the W-shaped 1-inlet-2-return ventilation mode specifically comprises the following steps: the middle lane is a coal transporting air inlet lane (6), and the upper lane and the lower lane are a waste rock transporting air return upper lane (5) and a waste rock transporting air return lower lane (7) respectively; 2 scraper conveyors (14) are arranged at the front part of the filling hydraulic support, and filling waste rocks are conveyed from two sides of the working face to the middle after entering a gob behind the working face; the W-shaped 1-inlet 2-return ventilation mode mainly uses high-efficiency filling of solid waste and assists coal mining;
the W-shaped 2-in 1-return ventilation mode specifically comprises the following steps: the middle lane is a gangue conveying return air lane (11), the upper lane and the lower lane are a coal conveying air inlet upper lane (10) and a coal conveying air inlet lower lane (12), and the gangue is filled into a goaf behind the working face and then conveyed from the middle of the working face to two sides; the W-shaped 2-in 1-return ventilation mode mainly uses high-efficiency coal mining on a working face and uses filling as auxiliary.
2. The ultra-long solid-pack face coal mining system of claim 1, wherein: a W-shaped 2-in 1-return ventilation mode is adopted, a middle lane (11) is used as a gangue conveying return air lane, and when a coal conveying air inlet upper lane (10) and a coal conveying air inlet lower lane (12) are simultaneously used as coal conveying air inlet lanes, 2 scraper conveyors (14) are arranged at the front part of a filling hydraulic support; when one side of the coal transporting air inlet upper lane (10) or the coal transporting air inlet lower lane (12) is used as a coal transporting air inlet lane, the front part is provided with 1 part of scraper conveyors (14).
3. A coal mining method for an ultra-long solid filling working face is characterized in that: the ultra-long solids-packed face coal mining system as claimed in claim 1, including the steps of:
a. arranging a return air upper mountain (1) and a transportation upper mountain (2) in a mining section, then tunneling three roadways of an ultra-long solid filling working face in a coal seam, wherein a middle roadway is positioned in the middle of the working face, and after excavating and cutting holes, the middle roadway and an upper roadway and a lower roadway are alternately used as a coal transporting air inlet roadway or a gangue transporting air return roadway to form a W-shaped ventilation system with 1 inlet and 2 return or 2 inlet and 1 return;
b. filling coal mining equipment comprising a coal mining hydraulic support (8), a coal mining machine (13), a front scraper conveyor (14) and a rear porous bottom-dump conveyor (15) is arranged in the working face to form a complete production system;
c. adopting a backward filling coal mining operation, and sequentially finishing the working procedures including coal cutting, frame moving, pushing and sliding and filling on a working face;
d. in the process of advancing the working face, a roadside filling body (4) is constructed on one side of a lower roadway of the section to finish the operation of gob-side entry retaining;
e. and c, repeating the steps c to d until the mining operation of the whole working face is completed.
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| CN110593954A (en) * | 2019-08-28 | 2019-12-20 | 精英数智科技股份有限公司 | Method and device for identifying position abnormality of gas sensor on coal mine coal face |
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2020
- 2020-08-20 CN CN202010841559.2A patent/CN111946393B/en active Active
Patent Citations (7)
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| CN1763351A (en) * | 2003-12-12 | 2006-04-26 | 肖自立 | Four-control type comprehensive coal mining method |
| CN202560284U (en) * | 2012-03-12 | 2012-11-28 | 徐州中矿安达矿山科技有限公司 | Goaf flow field simulation experimental device of fully mechanized caving face in various ventilation modes |
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