CN110939464B - Gob-side entry retaining combined supporting method for adjacent working faces - Google Patents
Gob-side entry retaining combined supporting method for adjacent working faces Download PDFInfo
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- CN110939464B CN110939464B CN201911195730.0A CN201911195730A CN110939464B CN 110939464 B CN110939464 B CN 110939464B CN 201911195730 A CN201911195730 A CN 201911195730A CN 110939464 B CN110939464 B CN 110939464B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005065 mining Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000011178 precast concrete Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 2
- 230000008520 organization Effects 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 101150086005 gob-1 gene Proteins 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
A gob-side entry retaining combined supporting method for adjacent working faces is characterized in that in the stoping of the working face above the adjacent working face, the adjacent area of a goaf of the upper working face is determined as a lag area; a strong pier stud is erected in the lag zone, and a gob-side roadway which can be used for mining on the lower working face is formed on one side of a gob area on the upper working face; in the lower working face stoping process of the adjacent working face, determining the adjacent area of the goaf of the lower working face as a lag area; through dismantling, transporting and re-erecting operation, strong pier columns erected in adjacent lag areas of the upper working face goaf are continuously transferred into the lag areas of the lower working face goaf, and a gob-side roadway which can be used for mining the lower working face is formed on one side of the lower working face goaf. The invention can effectively reduce the mine pressure intensity of gob-side entry retaining of the lower working face, reduce the supporting difficulty and the supporting cost and also make the labor organization more convenient.
Description
Technical Field
The invention relates to a gob-side entry retaining combined supporting method for adjacent working faces.
Background
In the deep and to the exploitation of thick coal seam in colliery, because the tunnel bears strong dynamic pressure, and require to use a large amount of monomer pillars, just can reach and strut the effect, nevertheless because monomer pillar itself has the technological consideration of letting down the pressure, therefore, monomer pillar often has great deformation, thereby also make roof or coal-pushing have great deformation, this not only makes the monomer pillar can't retrieve, more make the roof of gob entry one side after the face exploitation, also can not in time collapse, make face goaf top still have obvious mine pressure phenomenon, and transmit the adjacent working face in below, make the adjacent working face in below more difficult when strutting in the tunnel, need put into more monomer pillars, the increase of monomer pillar must also influence the use in tunnel. Therefore, the existing gob-side entry retaining support method needs to be improved.
Disclosure of Invention
In order to solve the problems, the invention provides a gob-side entry retaining combined supporting method for adjacent working faces.
A gob-side entry retaining combined supporting method for adjacent working faces is characterized in that in the mining of the upper working face of the adjacent working face, an adjacent area of a goaf of the upper working face is determined as a lag area, and an area in front of the working face is determined as an advance area; in the lagging area, on the side opposite to the lower working face, gob-side entry retaining operation is carried out, a gob-side entry area of the upper working face is separated from the lagging area by adopting a roof cutting waste rock blocking pillar and a guniting closed net, a strong pier stud is erected in the lagging area, and through supporting an upper top plate, a gob-side entry which can be used for mining the lower working face is formed on one side of the gob-side entry area of the upper working face; the lower working face and the upper working face of the adjacent working faces start to recover after recovery or in the recovery process; in the lower working face stoping process of the adjacent working face, determining the adjacent area of the goaf of the lower working face as a lagging area, and determining the area in front of the working face as a leading area; in the lag area, performing gob-side entry retaining operation on one side opposite to the lower working face, and isolating the gob area of the lower working face from the lag area by adopting a roof cutting gangue blocking pillar and a guniting closed net; through dismantling, transporting and re-erecting operation, strong pier columns erected in adjacent lag areas of the upper working face goaf are continuously transferred into the lag areas of the lower working face goaf, and the strong pier columns support an upper top plate to form a gob-side roadway which can be used for mining the lower working face on one side of the gob-side of the lower working face.
In the gob-side entry retaining combined supporting method for the adjacent working faces, the strong pier stud is an assembly of more than one precast concrete cylinder, the precast concrete cylinders are formed on the ground, the precast concrete cylinders are transported to the underground from the ground during initial use, and when the strong pier stud is erected, the high-water material is poured between the precast concrete cylinders and the top plate to realize top pressing under pressure.
In the gob-side entry retaining combined supporting method for the adjacent working faces, all precast concrete cylinders of the strong pier are combined through mortise and tenon structures.
In the gob-side entry retaining combined supporting method for the adjacent working faces, top-cutting anchor cables are arranged in the top plate area above the top-cutting gangue-blocking pillars and the guniting closed net.
In the gob-side entry retaining combined supporting method for the adjacent working faces, the ranges of a lagging area and a leading area are further determined through field mine pressure monitoring, and stress concentration coefficients in the lagging area and the leading area are both greater than 1.
In the gob-side entry retaining combined supporting method for the adjacent working faces, the transportation and the erection of the powerful pier stud are realized in a hoisting mode by a manipulator or a winch.
In the gob-side entry retaining combined supporting method for the adjacent working faces, the number of the powerful pier studs is determined by the pressure intensity of the top plate of the working face.
Compared with the prior art, the invention has the following technical advantages:
(1) The strong pier stud can provide enough supporting strength, is small in deformation allowed by the strong pier stud, and is supported by the top pressed by the belt, so that the strong pier stud can be easily moved to the lower working surface for gob-side entry retaining operation by removing the top pressed part of high-water materials after the recovery of the strong pier stud on the upper working surface.
(2) According to the invention, by removing the powerful pier stud in the gob-side entry retaining of the upper working face in time and the action of the top-cutting baffle strut and the top-cutting anchor cable, after the upper working face is recovered, a large area of suspended roof cannot be reserved in a goaf, so that the mine pressure display of gob-side entry retaining operation of the lower working face is weakened, and therefore, the supporting strength and the cost input of the gob-side entry retaining of the lower working face are effectively reduced.
(3) The invention realizes the connection of gob-side entry retaining operation of the adjacent working faces by repeatedly using the powerful pier stud for two times, even three times and four times of the adjacent working faces, so the invention can effectively reduce the input of gob-side entry retaining support.
(4) The invention is constructed by the same process, so the invention is more convenient for the coordination of labor organization.
Drawings
In order that the contents of the invention may be more clearly understood, the invention is further described below with reference to the accompanying drawings and examples.
FIG. 1 is a schematic plan view of a gob-side entry retaining support of a working face above the gob-side entry retaining combined support method of adjacent working faces according to the present invention;
FIG. 2 is a schematic plan view of the gob-side entry retaining support of the working face under the gob-side entry retaining combined support method of the adjacent working faces of the invention.
Labeled as: 1-upper working face goaf, 2-roof cutting and gangue stopping pillars, 3-slurry spraying closed nets, 4-roof cutting anchor cables, 5-strong pier studs, 6-single pillars, 7-pi-shaped beams, 8-lag areas, 9-lead areas and 10-lower working face goaf.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 and 2 show a preferred embodiment of the gob-side entry retaining combined supporting method for adjacent working faces of the invention.
In the gob-side entry retaining combined supporting method for the adjacent working faces, in the mining of the upper working face of the adjacent working face, the area adjacent to the gob area 1 of the upper working face is determined as a lag area 8, and the area in front of the working face is determined as an advance area 9;
in the lag area 8, on the side opposite to the lower working face, performing gob-side entry retaining operation, separating the upper working face gob area 1 from the lag area 8 by adopting a roof cutting gangue-blocking pillar 2 and a guniting closed net 3, vertically arranging a strong pier stud 5 in the lag area 8, forming a gob-side roadway which can be used for mining the lower working face on one side of the gob area 1 along the upper working face through supporting an upper top plate by the strong pier stud 5, in the roadway of an advance area 9, the roadway top plate adopts a supporting mode of combining a single pillar 6 and a pi-shaped beam, the advance area 9 is continuously changed into the lag area 8 along with continuous propulsion of the upper working face, and on the side opposite to the lower working face, the supporting mode of combining the single pillar 6 and the pi-shaped beam is continuously replaced by the strong pier stud 5;
the lower working face and the upper working face of the adjacent working faces start to recover after recovery or in the recovery process;
in the lower working face stoping process of the adjacent working faces, determining the adjacent area of the lower working face gob area 10 as a lag area 8, and determining the area in front of the working faces as an advance area 9;
in the lag area 8, performing gob-side entry retaining operation on one side opposite to the lower working face, and isolating the lower working face goaf 10 from the lag area 8 by adopting a roof cutting gangue stopping pillar 2 and a guniting closed net 3;
through dismantling, transporting and re-erecting operation, the strong pier stud 5 erected in the adjacent lag area 8 of the upper working face gob 1 is continuously transferred into the lag area 8 of the lower working face gob 10, and the strong pier stud 5 supports an upper top plate to form a gob-side roadway which can be used for mining of a lower working face on one side of the lower working face gob 10.
In this embodiment, powerful pier stud 5 is the assembly of more than one precast concrete cylinder, and the precast concrete cylinder forms on ground, transports to the pit from ground when first use, when setting up powerful pier stud 5 immediately, realizes pressing the top through pouring high water material between precast concrete cylinder and roof with the area.
In this embodiment, the prefabricated concrete columns of the strong pier 5 are combined through mortise and tenon structures.
In the embodiment, a top-cutting anchor rope 4 is also arranged in the top plate area above the top-cutting gangue stopping prop 2 and the guniting closed net 3.
In the present embodiment, the extent of the lag zone 8 and lead zone 9 is further determined by in-situ mine pressure monitoring, and the stress concentration factor is greater than 1 in both the lag zone 8 and lead zone 9.
In the embodiment, the powerful pier 5 is transported and erected by means of a manipulator or a winch.
In this embodiment, the number of power pillars 5 is determined by the working face top plate pressing strength.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (5)
1. A gob-side entry retaining combined supporting method for adjacent working faces is characterized in that:
in the stoping of the upper working face of the adjacent working face, the adjacent area of the goaf (1) of the upper working face is determined as a lag area (8), and the area in front of the working face is determined as a lead area (9);
in the lagging region (8), performing gob-side entry retaining operation on one side opposite to the lower working face, separating the upper working face goaf (1) from the lagging region (8) by adopting a roof cutting gangue blocking pillar (2) and a guniting closed net (3), vertically arranging a strong pier stud (5) in the lagging region (8), forming a gob-side roadway which can be used for mining the lower working face on one side along the upper working face goaf (1) by supporting an upper top plate through the strong pier stud (5), in the roadway of an advancing region (9), the roadway top plate adopts a supporting mode of combining a single pillar (6) and a pi-shaped beam, the advancing region (9) is continuously changed into the lagging region (8) along with the continuous advancing of the upper working face, and the combined supporting mode of the single pillar (6) and the pi-shaped beam is continuously replaced by the strong pier stud (5) on the side opposite to the lower working face;
the lower working face and the upper working face of the adjacent working faces start to carry out stoping after stoping of the upper working face is finished or in the stoping process;
in the lower working face stoping process of the adjacent working faces, the adjacent area of the goaf (10) of the lower working face is determined as a lag area (8), and the area in front of the working face is determined as an advance area (9);
in the lag area (8), performing gob-side entry retaining operation on one side opposite to the lower working face, and isolating the lower working face goaf (10) from the lag area (8) by adopting a roof cutting gangue blocking pillar (2) and a guniting closed net (3);
through dismantling, transporting and re-erecting operation, constantly transferring a strong pier stud (5) erected in a lag region (8) adjacent to the upper working face goaf (1) into a lag region (8) of the lower working face goaf (10), and forming a gob-side roadway which can be used for mining the lower working face on one side of the lower working face goaf (10) through supporting an upper top plate by the strong pier stud (5);
the strong pier stud (5) is an assembly of more than one precast concrete cylinder, the precast concrete cylinders are formed on the ground, and are transported to the underground from the ground during primary use, and when the strong pier stud (5) is vertically arranged, a high-water material is poured between the precast concrete cylinders and a top plate to realize pressing and jacking under pressure;
and the prefabricated concrete columns of the strong pier stud (5) are combined through mortise and tenon structures.
2. The adjacent working face gob-side entry retaining combined supporting method according to claim 1, characterized in that: and a top-cutting anchor cable (4) is also arranged in the top plate area above the top-cutting gangue-blocking strut (2) and the guniting closed net (3).
3. The adjacent working face gob-side entry retaining combined supporting method according to claim 1 or 2, characterized in that: the range of the lag area (8) and the lead area (9) is further determined through field mine pressure monitoring, and the stress concentration coefficient in the lag area (8) and the lead area (9) is larger than 1.
4. The adjacent working face gob-side entry retaining combined supporting method according to claim 1 or 2, characterized in that: the strong pier column (5) is transported and erected in a hoisting mode through a manipulator or a winch.
5. The adjacent working face gob-side entry retaining combined supporting method according to claim 1 or 2, characterized in that: the number of the strong pier studs (5) is determined by the pressure intensity of the working face top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195730.0A CN110939464B (en) | 2019-11-29 | 2019-11-29 | Gob-side entry retaining combined supporting method for adjacent working faces |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911195730.0A CN110939464B (en) | 2019-11-29 | 2019-11-29 | Gob-side entry retaining combined supporting method for adjacent working faces |
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| CN110939464A CN110939464A (en) | 2020-03-31 |
| CN110939464B true CN110939464B (en) | 2022-11-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111734466B (en) * | 2020-06-29 | 2022-03-18 | 陕西煤业化工技术研究院有限责任公司 | Gob-side entry retaining roadway support system and method for three-soft coal seam coal pillar-free mining |
| CN111963197B (en) * | 2020-08-28 | 2023-02-21 | 陕西煤业化工技术研究院有限责任公司 | Gob-side entry retaining roadway supporting method for three-soft coal seam coal pillar-free mining |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5027752B2 (en) * | 2008-07-29 | 2012-09-19 | 大成建設株式会社 | Construction method of underground floor pillar and underground floor pillar |
| CN102852551A (en) * | 2012-09-17 | 2013-01-02 | 扬州中矿建筑新材料科技有限公司 | Gob-side entry retaining method using high-water material filling columns |
| CN103850708A (en) * | 2012-11-30 | 2014-06-11 | 四川省煤炭产业集团有限责任公司 | Method for performing gob-side entry retaining through concrete filling body |
| CN104074534B (en) * | 2014-06-27 | 2016-08-24 | 辽宁工程技术大学 | A kind of combining adopts/the gob-side entry retaining method of fully mechanized coal face |
| CN104863588A (en) * | 2015-03-26 | 2015-08-26 | 兖州煤业股份有限公司 | Advanced pier column pre-arranging gob-side entry retaining method |
| CN105003288B (en) * | 2015-08-11 | 2018-01-23 | 河北煤炭科学研究院 | A kind of method and support system of medium-thickness seam gob side entry retaining |
| CN205778957U (en) * | 2016-06-23 | 2016-12-07 | 山东科技大学 | A kind of delayed section of support system of workings subject to dy namic pressure |
| CN206681769U (en) * | 2017-04-13 | 2017-11-28 | 中煤能源研究院有限责任公司 | Gob side entry retaining pours the detachable template of pier stud by lane and combined the unit with automatic shifting stand |
| CN107191208B (en) * | 2017-06-26 | 2019-04-30 | 永城煤电控股集团有限公司 | Rigid protection body Support Method in the lane flexible support Ti Yu by gob side entry retaining lane |
| CN207017144U (en) * | 2017-07-19 | 2018-02-16 | 中铁上海设计院集团有限公司 | A kind of attachment structure for full precast assembly bridge pier |
| CN107387084B (en) * | 2017-09-15 | 2019-03-05 | 中国矿业大学 | The construction method of top depth is cut in a kind of gob side entry retaining reduction |
| CN107882566B (en) * | 2017-10-31 | 2019-10-25 | 中国矿业大学(北京) | A kind of gob-side entry retaining method not influencing coal mining process |
| CN107740540B (en) * | 2017-11-28 | 2019-11-22 | 清华大学 | Mortise and tenon type steel core concrete column connector |
| CN107956481A (en) * | 2017-12-08 | 2018-04-24 | 陕西煤业化工技术研究院有限责任公司 | A kind of suspension device for superelevation tunnel gob side entry retaining |
| CN108194088B (en) * | 2017-12-28 | 2019-03-19 | 西安科技大学 | A kind of soft top coal layer cuts top release gob-side entry retaining method without explosion |
| CN108397213B (en) * | 2018-02-11 | 2019-03-22 | 中煤能源研究院有限责任公司 | Gob side entry retaining 3D printing Xiang Pang wall robot and construction method |
| CN108643907B (en) * | 2018-05-11 | 2020-02-25 | 山东科技大学 | Non-pillar mining method for broken direct roof caving roadway |
| CN109538210A (en) * | 2018-10-17 | 2019-03-29 | 仝矿伟 | A kind of soft extremely irregularcoal seam fully mechanized coal face gob-side entry retaining method of high methane three |
| CN110439560A (en) * | 2019-07-31 | 2019-11-12 | 四川华蓥山龙滩煤电有限责任公司 | A kind of construction technology of medium-thickness seam coal working face along the lane Kong Hu |
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