CN111894585A - Fully-mechanized coal mining face system for improving mining rate of mining area - Google Patents
Fully-mechanized coal mining face system for improving mining rate of mining area Download PDFInfo
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- CN111894585A CN111894585A CN202010679052.1A CN202010679052A CN111894585A CN 111894585 A CN111894585 A CN 111894585A CN 202010679052 A CN202010679052 A CN 202010679052A CN 111894585 A CN111894585 A CN 111894585A
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- 239000003245 coal Substances 0.000 title claims abstract description 94
- 238000005065 mining Methods 0.000 title claims abstract description 94
- 239000007787 solid Substances 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 5
- 238000009423 ventilation Methods 0.000 claims description 13
- 239000011435 rock Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010878 waste rock Substances 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
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
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- Architecture (AREA)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a fully mechanized coal mining face system for improving the recovery rate of a mining area, which comprises a first mining face coal pillar A, a return airway, mining solid coal, a belt conveying airway, a next working face coal pillar B and an auxiliary conveying airway which are sequentially and transversely arranged, a coal mining machine, a scraper conveyor, a large side guard plate reinforced hydraulic support and a hydraulic support are arranged behind the solid coal mining, the reinforced hydraulic support is arranged on one side of a coal pillar A of a first mining working face, the reinforced hydraulic support comprises a reinforced lengthened top beam side protection plate, a reinforced lengthened shield beam side protection plate and a reinforced lengthened base side protection plate, a hydraulic oil cylinder is arranged between the base side protection plate and a base, the top beam side protection plate, the shield beam side protection plate and the base side protection plate of the reinforced hydraulic support form a wind-break wall together, and hanging a local pressure fan on the reinforced lengthened top beam side guard plate or paving a pressure air pipe in a cable duct of the working surface. The invention reduces the loss of coal pillars, improves the extraction rate of coal, realizes high yield and high efficiency, and improves the green and clean mining levels of mines.
Description
Technical Field
The invention belongs to the technical field of coal mining, and relates to a fully mechanized coal mining face system for improving the recovery rate of a mining area.
Background
The coal pillar is reserved between two working faces in the traditional coal underground mining long-wall fully-mechanized mining working face arrangement mode and used for controlling the movement of an overlying rock stratum and isolating harmful gases and other hazards of a goaf, the coal pillar cannot be recycled in the working face arrangement mode, the width of the coal pillar is about 10-25 meters, and a large amount of coal resources are wasted. In order to solve the problem, a coal pillar-free mining mode represented by a gob-side entry retaining technology is formed in China at present. The non-pillar mining can effectively reduce the roadway excavation amount and improve the coal extraction rate, and is one of important ways for improving safety conditions and technical and economic indexes of coal enterprises, but the method needs to form roadside support in modes of artificial construction or filling and the like, the difficulty of the mining and filling integrated operation is high, the propelling speed of a working face can be reduced to a certain extent, and the difficulty of achieving the target yield by adopting the method for mines with high requirements on efficient production and high-speed propelling is relatively improved.
Disclosure of Invention
The invention aims to solve the problems and provides a fully mechanized coal mining face system for improving the recovery rate of a mining area, so that the coal recovery rate is greatly improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fully-mechanized mining face system for improving the recovery rate of a mining area comprises a first mining face coal pillar A (3-1), an air return roadway (2-1), mining solid coal (2'), a rubber belt conveying roadway (2-2), a next working face coal pillar B (3-2) and an auxiliary conveying roadway (2-3) which are sequentially and transversely arranged, a coal mining machine (4), a scraper conveyor (5), a large side guard plate reinforced hydraulic support (6) and a hydraulic support (7) are arranged behind the mining solid coal, the large side guard plate reinforced hydraulic support (6) is arranged on one side of the first mining face coal pillar A (3-1), the large side guard plate reinforced hydraulic support (6) comprises a reinforced lengthened top beam side guard plate (61), a reinforced lengthened shield beam side guard plate (62) and a reinforced lengthened base side guard plate (63), a hydraulic oil cylinder (64) is arranged between the reinforced lengthened base side guard plate (63) and a base, the front end of the reinforced lengthened base side guard plate (63) is aligned with the front end of the reinforced lengthened top beam side guard plate (61), the front ends of the side guard plates (62) of the reinforced lengthened shield beams are positioned at the inner sides of the rear ends of the side guard plates (61) of the reinforced lengthened top beams and are overlapped, the upper end of the reinforced lengthened base side guard plate (63) is superposed with the lower end of the reinforced lengthened top beam side guard plate (61) and the lower end of the reinforced lengthened shield beam side guard plate (62), the reinforced lengthened top beam side guard plate (61), the reinforced lengthened shield beam side guard plate (62) and the reinforced lengthened base side guard plate (63) of the reinforced hydraulic support form a wind shielding and waste rock blocking wall together, a local pressure fan is hung on the reinforced lengthened top beam side guard plate or a pressure air pipe is laid in a cable groove of a working surface to ensure the ventilation safety of the tail, and arranging an advanced hydraulic support (9) in the air return roadway to prevent the air return roadway from damaging surrounding rocks in advance due to pressure advance.
Further, when the working face system (2) is arranged, the large side guard plate reinforced hydraulic support (6) and the hydraulic support (7) on the side adjacent to the first mining working face (1) are arranged in the first mining working face coal pillar A, and the distance between the working face system (2) and the goaf boundary of the first mining working face (1) is equal to
,
Is the width of the laneway (1-2),
the width of the remaining coal pillar is the width of the remaining coal pillar,
。
further, the working face system (2) returns air and enters air through the return airway (2-1), the rubber belt conveying airway (2-2) and the auxiliary conveying airway (2-3).
The invention has the beneficial effects that:
1. the invention realizes the maintenance of the safe operation space when the coal pillar and the solid coal are jointly mined by arranging the reinforced hydraulic support, the common hydraulic support and the residual width protection coal pillar for combined support, ensures the end support effect and realizes the joint mining of the coal pillar and the solid coal; by extending and arranging the scraper conveyor and the reinforced hydraulic support to a distance from a first mining working face goaf
The coal pillar and the solid coal are cut and mined together without interruption, the coal pillar is recovered, and the coal mining rate is improvedThe method is beneficial to improving the green and clean mining level of the mine;
2. the continuous cutting of the coal pillar and the solid coal on the working face can be realized, the working procedures are smoothly and uninterruptedly jointed, and the high yield and the high efficiency are favorably realized;
3. the invention meets the ventilation requirement of the tail part of the scraper conveyor by preferably arranging the compressed air pipe in the cable duct, can reduce the influence of the ventilation system on the continuous propulsion of the working surface, improves the ventilation effect of the tail part of the scraper conveyor, and simultaneously is beneficial to preventing harmful gas in a goaf from gushing out in a compressed ventilation mode.
Drawings
Fig. 1 is a layout diagram of a fully mechanized mining face system for improving the recovery rate of a mining area.
Fig. 2A is a schematic structural view of a large side guard plate reinforced hydraulic support.
Fig. 2B is a schematic side view of a large skirt reinforced hydraulic bracket.
Fig. 3 shows the cable trough with a plenum pipe.
Detailed Description
As shown in fig. 1 to 3, the fully mechanized coal mining face system for improving the recovery rate of the mining area comprises a first mining face coal pillar a (3-1), an air return roadway (2-1), a mining entity coal, a belt conveying roadway (2-2), a next working face coal pillar B (3-2) and an auxiliary conveying roadway (2-3) which are sequentially and transversely arranged, a coal mining machine (4), a scraper conveyor (5), a large side guard plate reinforced hydraulic support (6) and a hydraulic support (7) are arranged behind the mining entity coal, the large side guard plate reinforced hydraulic support (6) is arranged on one side of the first mining face coal pillar a (3-1), and as shown in fig. 2A and 2B, the large side guard plate reinforced hydraulic support (6) comprises a reinforced lengthened top beam side guard plate (61), a reinforced shield beam side guard plate (62), and a reinforcing type auxiliary conveying roadway (2-3) And a reinforced lengthened base side guard plate (63), the bottom of the reinforced lengthened base side guard plate (63) is hinged with one side of the base, hydraulic oil cylinders (64) are installed between the upper end of the reinforced lengthened base side guard plate (63) and the top of the base, the hydraulic oil cylinders (64) are arranged in two spaced-apart front-back directions, the front end of the reinforced lengthened base side guard plate (63) is aligned with the front end of the reinforced lengthened top beam side guard plate (61), the front end of the reinforced lengthened shield beam side guard plate (62) is positioned at the inner side of the rear end of the reinforced top beam lengthened side guard plate (61) and is superposed, the upper end of the reinforced lengthened base side guard plate (63) is superposed with the lower end of the reinforced lengthened top beam side guard plate (61) and the lower end of the reinforced lengthened shield beam side guard plate (62), as shown in figure 3, a local pressure air fan is hung on the reinforced lengthened top beam side guard plate or a pressure air pipe (8) is laid in a cable groove, and arranging an advanced hydraulic support (9) in the air return roadway to prevent the air return roadway from damaging surrounding rocks in advance due to pressure advance.
Further, when the working face system (2) is arranged, the large side guard plate reinforced hydraulic support (6) and the common hydraulic support (7) on the side adjacent to the first mining working face (1) are arranged in the first mining working face coal pillar A (3-1), and the distance between the working face system (2) and the goaf boundary of the first mining working face (1) is equal to
，
Is the width of the laneway (1-2),
the width of the remaining coal pillar is the width of the remaining coal pillar,
。
further, the working face system (2) returns air and enters air through the return airway (2-1), the rubber belt conveying airway (2-2) and the auxiliary conveying airway (2-3).
And after the first mining working face system (1) finishes mining, starting to arrange a continuous working face which is a fully mechanized mining working face system (2) for improving the recovery rate of the mining area. The fully-mechanized mining face system (2) comprises a first mining face coal pillar A (3-1), an air return roadway (2-1), mining solid coal (2'), a rubber belt conveying roadway (2-2), a next working face coal pillar B (3-2) and an auxiliary conveying roadway (2-3) which are sequentially and transversely arranged, and a coal mining machine (4), a scraper conveyor (5), a large side guard plate reinforced hydraulic support (6) and a hydraulic support (7) are arranged behind the mining solid coal. The reinforced lengthened top beam side guard plate (61), the reinforced lengthened shield beam side guard plate (62) and the reinforced lengthened base side guard plate (63) of the reinforced hydraulic support form a wind-break wall together, the wind-break wall can block wind from an air inlet lane to form backflow, harmful gas is prevented from accumulating at the position, and meanwhile, the wind-break wall blocks goaf waste rocks on a working surface (1) from entering the working surface. Namely, the reinforced hydraulic support has the functions of supporting, blocking rod and hanging local ventilator.
The first mining working face auxiliary transport lane (1-3) is used as the return air lane (2-1) of the working face system (2), and the widths of the return air lane, the rubber belt transport lane and the auxiliary transport lane of the first mining working face (1) and the working face system (2) are equal to
、
、
、
、
、
The width of the coal pillar is that the coal pillar is an auxiliary transportation lane of the working face 1 and a return air lane of the working face 2
）。
The maintenance of a safe operation space during the co-mining of coal pillars and solid coal is realized by arranging a large side guard plate reinforced hydraulic support (6), an advance hydraulic support (9), a hydraulic support (7) and a residual width protection coal pillar combined supportThe end supporting effect is ensured; by extending and arranging the scraper conveyor (5) and the reinforced hydraulic support (6) to a distance from a goaf of a first mining working face
And the coal pillar and the solid coal are cut and mined together without interruption, so that the loss of the coal pillar is reduced, the coal mining rate is improved, and the improvement of the green and clean mining level of a mine is facilitated.
The working face system (2) returns air and enters air through the air return roadway (2-1), the rubber belt conveying roadway (2-2) and the auxiliary conveying roadway (2-3), and the end part ventilation requirement is met by the working face system (2) in a mode that a local fan is arranged at the end part close to the goaf side of the first mining working face (1) or a pressure air pipe (7) is laid in a working face cable groove.
Preferably, the ventilation system meets the requirement of local ventilation of the end head at the end head part by laying a compressed air pipe (7) in a cable groove of a working face; or a local fan is arranged at the end part of the working face system (2) close to the mining area side of the first mining working face (1) and hung on the reinforced lengthened top beam side guard plate of the reinforced hydraulic support (6-1).
The following examples are given.
For example: the length of the first mining working face is about 200m, the width of a roadway (1-2) is 5m, and the width of a coal pillar is 25 m. The conventional arrangement mode is that after the first mining working face is mined, the continuous working face is continuously arranged along the solid coal, the length of the working face is 200m, the width of a roadway (2-1) is 5m, and the width of a coal pillar is 25 m. Fully-mechanized mining face system for improving mining area recovery rate through arranging large side guard plate reinforced hydraulic support, common hydraulic support and surplus
The width protection coal pillar combined support realizes the maintenance of a safe operation space when coal pillars and solid coal are mined together, and ensures the end support effect; by extending and arranging the scraper conveyor and the hydraulic support to a distance from the goaf of the first mining working face
The coal pillar and the solid coal are cut and mined together without interruption, so that the loss of the coal pillar is reduced, the coal mining rate is improved, and the green and clean mining level of a mine is favorably improved; the mode of arranging the compressed air pipes in the cable duct is preferably adopted to meet the ventilation requirement of the end part, the influence of a ventilation system on the continuous propulsion of a working surface can be reduced, the ventilation effect of the end part is improved, and the forced ventilation mode is simultaneously favorable for preventing harmful gas in the goaf from gushing out. The clean and efficient longwall fully-mechanized coal mining face for coal pillar and solid coal mining comprises 200m of solid coal, a return airway, and a part of the coal pillar between a first mining face and a continuous working face, wherein the total length of the working face is
，
Comprehensively determined according to mine pressure, water in a mining area, harmful gas and the like.
Is the width of the laneway (2-1). The unit advancing length is more than the width of the coal which can be recovered by the conventional arrangement mode
。
Claims (4)
1. The fully mechanized coal mining face system is characterized by comprising a first mining face coal pillar A (3-1), an air return roadway (2-1), mining solid coal (2'), a rubber belt conveying roadway (2-2), a next working face coal pillar B (3-2) and an auxiliary conveying roadway (2-3) which are sequentially and transversely arranged, wherein a coal mining machine (4), a scraper conveyor (5), a large side guard plate reinforced hydraulic support (6) and a common hydraulic support (7) are arranged behind the mining solid coal, the large side guard plate reinforced hydraulic support (6) is arranged in the first mining face coal pillar A (3-1), and an advance hydraulic support (9) is arranged in the air return roadway to prevent surrounding rock damage caused by pressure advance of the non-return air roadway.
2. The fully mechanized coal mining face system for improving recovery rate of a mining area of claim 1, wherein: the large side guard plate reinforced hydraulic support (6) comprises a reinforced lengthened top beam side guard plate (61), a reinforced lengthened shield beam side guard plate (62) and a reinforced lengthened base side guard plate (63), a hydraulic oil cylinder (64) is installed between the reinforced lengthened base side guard plate (63) and a base, the front end of the reinforced lengthened base side guard plate (63) is aligned with the front end of the reinforced lengthened top beam side guard plate (61), the front end of the reinforced lengthened shield beam side guard plate (62) is located on the inner side of the rear end of the reinforced lengthened top beam side guard plate (61) and coincides with the rear end of the reinforced lengthened base side guard plate, the upper end of the reinforced lengthened base side guard plate (63) and the lower end of the reinforced lengthened top beam side guard plate (61) and the lower end of the reinforced lengthened shield beam side guard plate (62) coincide, the reinforced lengthened shield beam side guard plate (61), the reinforced lengthened shield beam side guard plate (62) and the reinforced lengthened base side guard plate (63) of the, And the gangue blocking wall is used for hanging a local pressure fan on the reinforced lengthened top beam side guard plate or paving a pressure air pipe in a cable duct of the working face scraper conveyor to ensure the ventilation safety of the tail.
3. The fully mechanized coal mining face system for improving the recovery rate of the mining area according to claim 1, characterized in that the large side guard plate reinforced hydraulic support (6) and the hydraulic support (7) on the side adjacent to the first mining face (1) are arranged in the first mining face coal pillar A (3-1), and the distance between the face system (2) and the goaf boundary of the first mining face (1) is the width of the roadway (1-2) and the width of the residual coal pillar.
4. A fully mechanized mining face system for improving the recovery rate of a mining area according to claim 1 or 2, characterized in that the face system (2) passes through the return air lane (2-1), the rubber belt conveying lane (2-2), the auxiliary conveying lane (2-3) for return air and inlet air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679052.1A CN111894585A (en) | 2020-07-15 | 2020-07-15 | Fully-mechanized coal mining face system for improving mining rate of mining area |
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| CN202010679052.1A CN111894585A (en) | 2020-07-15 | 2020-07-15 | Fully-mechanized coal mining face system for improving mining rate of mining area |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915102A (en) * | 2010-08-20 | 2010-12-15 | 天地科技股份有限公司 | Comprehensive mechanization coal-mining method of heavy pitch course long well |
| CN102080556A (en) * | 2011-01-26 | 2011-06-01 | 郑州煤矿机械集团股份有限公司 | Transitional bracket for mechanized large mining height working face of coal |
| CN102587960A (en) * | 2012-03-22 | 2012-07-18 | 中国矿业大学 | Arrangement method of high gas coal seam extraction working face roadway |
| CN104594932A (en) * | 2014-12-29 | 2015-05-06 | 中国神华能源股份有限公司 | Mining supporting support equipment and mining method thereof |
| CN105240012A (en) * | 2015-09-02 | 2016-01-13 | 中国矿业大学(北京) | F-type section coal-mining method allowing commingled mining of coal pillars |
-
2020
- 2020-07-15 CN CN202010679052.1A patent/CN111894585A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915102A (en) * | 2010-08-20 | 2010-12-15 | 天地科技股份有限公司 | Comprehensive mechanization coal-mining method of heavy pitch course long well |
| CN102080556A (en) * | 2011-01-26 | 2011-06-01 | 郑州煤矿机械集团股份有限公司 | Transitional bracket for mechanized large mining height working face of coal |
| CN102587960A (en) * | 2012-03-22 | 2012-07-18 | 中国矿业大学 | Arrangement method of high gas coal seam extraction working face roadway |
| CN104594932A (en) * | 2014-12-29 | 2015-05-06 | 中国神华能源股份有限公司 | Mining supporting support equipment and mining method thereof |
| CN105240012A (en) * | 2015-09-02 | 2016-01-13 | 中国矿业大学(北京) | F-type section coal-mining method allowing commingled mining of coal pillars |
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Application publication date: 20201106 |