CN101775991A - Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face - Google Patents
Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face Download PDFInfo
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- CN101775991A CN101775991A CN201010010084A CN201010010084A CN101775991A CN 101775991 A CN101775991 A CN 101775991A CN 201010010084 A CN201010010084 A CN 201010010084A CN 201010010084 A CN201010010084 A CN 201010010084A CN 101775991 A CN101775991 A CN 101775991A
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Abstract
The invention discloses a method for significant reduction of bracket support of the gob-side roadway of a fully-mechanized mining face, which solves the problems of the prior art. In the specific technological scheme, brackets are directly applied to support a roadway, each group of brackets are arranged continuously as a whole along a track gate and is more than 30-35 meters away from the advance face of the track gate, and the uninterrupted installation of the brackets is performed along with advancement in face exploitation; and when the advancement length in the face exploitation is 1.5-2.5 times longer than the face length, the brackets are withdrawn from the beginning of the air return roadway of the working area along the bracket withdrawing direction, and the withdrawn brackets are continuously arranged in the track gate along the bracket arranging direction so as to be recycled in the advance support of the mining face. The invention has the advantages that: the support strength is high, and the amount of reduced plungers is large, thereby reducing the roadway maintenance workload; the brackets can be recycled, and the removal and recovery of the brackets can be performed synchronously with the face mining without influencing the production; and the invention facilitates the rapid restoration of the roadway in tunneling construction.
Description
Technical field
The present invention relates to coal cutting roadway support engineering method, be specifically related to a kind of fully-mechanized mining working gob side entry retaining tunnel that is applicable to the medium-thickness seam exploitation of using the comprehensive mechanical equalization amount of contracting bracket support method greatly, control gate road top board is realized the crossheading gob side entry retaining in recovery process.
Background technology
Gob side entry retaining is by adding strong supporting or roadside support, and the tailgate that the haulage way of a last section is remained as lower curtate uses.As a kind of non chain pillar entryprotection technology, gob side entry retaining is a kind of effective way of the existing coal resources of reasonably exploitation, raising coal resources recovery ratio; Adopt this method, can significantly reduce mine laneway driving amount, alleviate digging and take over anxiety, shorten the face moving time, prevent to get angry and prolong mine service-life etc., have tangible technical advantage and economic benefit.Gob side entry retaining generally is adapted to exploit the girdle and the medium-thickness seam of gentle dip and inclination.Concrete grammar mainly contains:
(1) builds waste pack by laying bricks or stones.Along with the propelling of stope, group builds the wide waste pack of some rice by laying bricks or stones on the tunnel, so that safeguard section transportation lane.
(2) install close standing props or grillage.Group along with the propelling of work plane, in time installs single or double close standing props or grillage near the place, goaf on the tunnel.
(3) add the metallic support in Guyuan tunnel.Along with the propelling of work plane, keep the enough crossover distances of work plane, in the metallic support in transportation lane, install center pillar, return and fall to go up group's leg, and across pitch installs joist, hold the metal capplce, safeguard the termination, so that work plane carries head to move forward.After conveyer moves past, on the work plane rear installs, help leg again, and between metallic support, install close standing props by goaf one side, hang basketry retaining cash, caving then.
(4) adopt the anhydrite packwall, be also referred to as other lane supporting.Near goaf one side, adopt natural or artificial anhydrite (calcium sulfate) in the tunnel, do the rigidity packwall with accelerated cement, but so both roof supporting was safeguarded the tunnel, can isolate the goaf again.Other lane prop intensity height does not have compressible amount, causes former roadway deformation big, and the ventilation section reduces, and the undercover work amount is very big.
It more than is the existing main method of gob-side entry retaining support, support frame all adopts and moves towards arrangement, and these traditional approach all exist " U " type draft type, support process is loaded down with trivial details, supporting effect is poor, consume that manpower is many, labour intensity is big, roadway deformation seriously is difficult to the problem recovering to construct.
Summary of the invention
The invention discloses a kind of fully-mechanized mining working gob side entry retaining tunnel amount of contracting bracket support method (" staying the lane amount of contracting support greatly " abbreviation " support ", as follows) greatly, promptly the full section continuous supporting of support method solves an above-mentioned difficult problem, has good effect.
The present invention adopts " Y " type draft type in order to solve ventilation, to stop gas hazard, does not promptly collapse with exploitation at exploitation process middle orbit crossheading, and the track crossheading is reserved as the directly logical border of return airway return airway, adopts the mode of " two advance a time " to ventilate.
Concrete construction technology technical scheme is:
(1) the fully-mechanized mining working all devices is introduced into open-off cut and installs, and possesses the start working condition.
(2) installation reference line of force piece stretches out the size of rib, is not more than 1/2 of force piece width;
(3) directly adopt the bracket support tunnel, a pack support by four columns, integral body put in a skylight back timber and not the back cover base for supporting constitute; The installation center line of first pack support that will be in work plane is as the center line of force piece, installation work face support.
(4) every pack support is transported into the installation site by work plane track crossheading integral body, and support is installed center line should be parallel to work plane, along with the support installation is provided with the support back immediately, reaches setting load; The spacing of the column of the same position of adjacent every pack support is not more than 1.5 times of every pack support width.
(5) mounting bracket begins to be mounted to continuously track crossheading first advance apart from not being shorter than 30 meters～35 meters by first pack support, is controlled at 30 meters usually, and exceeding 35 meters scopes should determine according to ahead work face supporting design.
(6) exploitation with work plane advances, uninterrupted mounting bracket; The support of installing guarantees to reach yield load after progressively entering the goaf scope earlier, and slowly sinks with top board.
(7) when working face mining advances length greater than 1.5～2.5 times of face length, usually be controlled at 1.5 times, begin to withdraw from direction from support in the return aircourse, exploiting field and withdraw from support, the support of withdrawing from continues the injection crossheading at the support approach axis, recycles in the ahead work face supporting; Support reclaims with working face mining and carries out synchronously.
Usefulness of the present invention is:
1. owing to stay the lane directly to adopt the hydraulic support tendency to arrange the supporting tunnel, this technology has effectively improved roadway support intensity height, the post amount of contracting of living is big, has reduced the roadway maintenance amount; Therefore solved and stayed the technical barrier that roadway deformation amount in lane is big, be difficult to safeguard in the original construction.
2. owing to adopted high-strength support, stay the lane support to stay enough spaces, the staff can directly construct in support, the more important thing is the personal safety that has guaranteed the constructor, has reduced accident.
3. because support stays the lane to keep enough length in the goaf scope, stay to remove by the border return airway behind the stability of the roadway of lane and reclaim, so support can recycle.
4. since support according to the ahead work face supporting, the dismounting of support is reclaimed to advance with working face mining and be carried out synchronously, does not influence production.
5. because support frame is staying the lane stability of the roadway to remove later on, be convenient to tunneling construction and recover the tunnel as early as possible; Difficult problems such as having solved to stay in the recovery construction of lane needs the work of caunching of acting as a planted agent, and workload is big, difficulty of construction is big, danger is big.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is further described.
Fig. 1 is that fully-mechanized mining working gob side entry retaining bracket support is arranged schematic diagram;
Fig. 2 is that fully-mechanized mining working gob side entry retaining bracket support is arranged schematic diagram B-B sectional drawing.
Fig. 1 and Fig. 2 have mainly illustrated the arrangement and the position of support.
Accompanying drawing mark: force piece 1, force piece width 2, work plane 3, center line 4, installation reference line 5, rib 6, support approach axis 7, support 8, column 9 are installed, are withdrawn from direction 11, air partition 12, filling area 13, anchor point 14 to section boundary return airway 10, support.
The specific embodiment
This coal cutting roadway support engineering directly adopts support and tendency to arrange supporting tunnel technology.
So-called support is the hydraulic pressure amount of the contracting standing support greatly of particular design, every group by four columns, integral body put in a skylight back timber and not the back cover base constitute; Support length * wide=3.5m * 1.5m, height 1.7m～3.2m is more than the post amount of contracting of the living 1.6m, about working resistance 3500kN.
As shown in Figure 1: at first combine and adopt preceding preparation.At work plane 3 all devices is comprised that force piece 1, transporter etc. are introduced into open-off cut and install; The installation reference line 5 of force piece 1 stretches out the size of rib 6, is not more than 1/2 of force piece width 2; The installation center line 4 of first pack support 8 that will be in work plane 3 back is as the center line of force piece 1; The below installation and transportation machine of force piece 1, equipment installs, and has possessed the start working condition.
Adopt support 8 to arrange the supporting tunnel.Every pack support 8 is transported to the installation site by the track crossheading of work plane 3 along support approach axis 7 integral body; Support 8 is parallel to work plane 3 by its installation center line 4 and installs, installation along with support 8, the support back is set simultaneously immediately, reach setting load, the spacing of the column 14 of the same position of every pack support 8 is not more than 1.5 times of every pack support width, just every pack support 8 width are 2 meters substantially, if be close between the two adjacent groups support 8, the spacing of the column 14 of the same position of so every pack support 8 also is 2 meters; If deposit between the two adjacent groups support 8 at interval, the spacing of the column 14 of the same position of so every pack support 8 also must not be above 3 meters.
Mounting bracket 8 is to be mounted to track crossheading first advance 3 distances continuously by 8 beginnings of first pack support not to be shorter than 30 meters～35 meters, usually be controlled at 30 meters, should be synchronous in comprehensive progress of adopting mounting bracket 8 in the production with pushing ahead of work plane 3, promptly push ahead, uninterruptedly mounting bracket 8 forward with exploitation work plane 3; Should determine according to ahead work face supporting design for the distance range that exceeds 35 meters.
Along with work plane 3 is pushed ahead, the support 8 of first pack support 8 and installation earlier etc. progresses into the goaf scope, still guarantees to reach yield load, and slowly sink with top board, because the amount of contracting of support 8 is big, can reach more than the 1.6m, can adapt to the amount of crushing of staying the lane bigger; Avoid the supporting of use monomer because the amount of contracting is not enough, frequently changed the problem of monomer.
When exploitation advance distance during greater than 1.5～2.5 times of work plane 3 length, when being controlled at 1.5 times usually, support 8 is stable in the Liu Xiang tunnel in goaf, can withdraw from support 8 beginning to withdraw from direction 11 from support to return aircourse, exploiting field 10 1 sides, the support of withdrawing from 8 is transported to the track crossheading that support approach axis 7 continues to enter work plane 3, recycles in work plane 3 advance supports.
Claims (3)
1. the fully-mechanized mining working gob side entry retaining tunnel amount of contracting bracket support method greatly, it is characterized in that: concrete process program is as follows:
(1) the fully-mechanized mining working all devices is introduced into open-off cut and installs, and possesses the start working condition.
(2) installation reference line of force piece stretches out the size of rib, is not more than 1/2 of force piece width;
(3) directly adopt the bracket support tunnel, a pack support by four columns, integral body put in a skylight back timber and not the back cover base for supporting constitute; The installation center line of first pack support that will be in work plane is as the center line of force piece, installation work face support.
(4) every pack support is transported into the installation site by work plane track crossheading integral body, and support is installed center line should be parallel to work plane, along with the support installation is provided with the support back immediately, reaches setting load; The spacing of the column of the same position of adjacent every pack support is not more than 1.5 times of every pack support width.
(5) mounting bracket begins to be mounted to continuously track crossheading first advance apart from not being shorter than 30 meters～35 meters by first pack support.
(6) exploitation with work plane advances, uninterrupted mounting bracket; The support of installing guarantees to reach yield load after progressively entering the goaf scope earlier, and slowly sinks with top board.
(7) when working face mining advances length greater than 1.5～2.5 times of face length, begin to withdraw from direction in the return aircourse, exploiting field and withdraw from support from support, the support of withdrawing from continues the injection crossheading at the support approach axis, recycles in the ahead work face supporting; Support reclaims with working face mining and carries out synchronously.
2. according to the described fully-mechanized mining working gob side entry retaining of the claim 1 tunnel amount of contracting bracket support method greatly, it is characterized in that: described (5) mounting bracket begins to be mounted to continuously track crossheading first advance distance by first pack support and is controlled at 30 meters usually, and exceeding 35 meters scopes should determine according to ahead work face supporting design.
3. according to the described fully-mechanized mining working gob side entry retaining of the claim 1 tunnel amount of contracting bracket support method greatly, it is characterized in that: described (7) usually when working face mining advance length be face length 1.5 the time, begin to withdraw from direction in the return aircourse, exploiting field and withdraw from support from support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100100849A CN101775991B (en) | 2010-01-11 | 2010-01-11 | Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face |
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| CN2010100100849A CN101775991B (en) | 2010-01-11 | 2010-01-11 | Method for significant reduction of bracket support of gob-side roadway of fully-mechanized mining face |
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| CN101775991A true CN101775991A (en) | 2010-07-14 |
| CN101775991B CN101775991B (en) | 2012-10-31 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678123A (en) * | 2012-05-22 | 2012-09-19 | 山东科技大学 | Gob-side entry retaining method for thin coal layer under hard limestone top plate |
| CN105019925A (en) * | 2015-08-04 | 2015-11-04 | 山西晋城无烟煤矿业集团有限责任公司 | Surplus superelevation section supporting technology for coalface |
| CN108222935A (en) * | 2015-06-24 | 2018-06-29 | 北京中矿创新联盟能源环境科学研究院 | Equipment system of roadway-free coal-pillar-free self-retained roadway mining method |
| CN109403973A (en) * | 2018-09-26 | 2019-03-01 | 四川省煤炭产业集团有限责任公司 | A kind of flexible type shield gob-side entry retaining method |
| CN109882177A (en) * | 2019-04-04 | 2019-06-14 | 中国矿业大学(北京) | Realize working face extraction, Liu Xiang, removal of home and Pillar Recovery coordinative operation method |
| US10494924B2 (en) | 2015-06-24 | 2019-12-03 | Manchao He | Longwall mine construction method N00 |
| CN110779483A (en) * | 2019-10-29 | 2020-02-11 | 青岛本末岩控技术有限公司 | Analysis method for distinguishing active shrinkage and passive shrinkage of movable column of hydraulic support |
| CN111779514A (en) * | 2019-04-04 | 2020-10-16 | 中国矿业大学(北京) | Method for realizing no special channel, coal pillar and quick withdrawing device for working face end mining |
| CN113931686A (en) * | 2020-07-14 | 2022-01-14 | 天地科技股份有限公司 | Filling mining method and combined support for underground mineral mining |
| CN114183181A (en) * | 2021-12-21 | 2022-03-15 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Advanced support method for return airway of large dynamic pressure fully mechanized mining face |
| CN114352318A (en) * | 2022-01-07 | 2022-04-15 | 国家能源集团宁夏煤业有限责任公司 | Method for advanced support of return airway of fully mechanized caving face |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457651B (en) * | 2008-11-19 | 2010-09-01 | 淮南矿业(集团)有限责任公司 | Filling stack advanced support method along empty tunnel in coal-gas co-milling Y-shaped ventilating system |
| CN101503959A (en) * | 2008-11-26 | 2009-08-12 | 枣庄矿业（集团）有限责任公司滨湖煤矿 | Gob-side entry retaining support method |
-
2010
- 2010-01-11 CN CN2010100100849A patent/CN101775991B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678123A (en) * | 2012-05-22 | 2012-09-19 | 山东科技大学 | Gob-side entry retaining method for thin coal layer under hard limestone top plate |
| US10494924B2 (en) | 2015-06-24 | 2019-12-03 | Manchao He | Longwall mine construction method N00 |
| CN108222935A (en) * | 2015-06-24 | 2018-06-29 | 北京中矿创新联盟能源环境科学研究院 | Equipment system of roadway-free coal-pillar-free self-retained roadway mining method |
| US11008860B2 (en) | 2015-06-24 | 2021-05-18 | Manchao He | Equipment system for no-roadway no-coal-pillar retained roadway mining method |
| CN105019925A (en) * | 2015-08-04 | 2015-11-04 | 山西晋城无烟煤矿业集团有限责任公司 | Surplus superelevation section supporting technology for coalface |
| CN109403973A (en) * | 2018-09-26 | 2019-03-01 | 四川省煤炭产业集团有限责任公司 | A kind of flexible type shield gob-side entry retaining method |
| CN111779514A (en) * | 2019-04-04 | 2020-10-16 | 中国矿业大学(北京) | Method for realizing no special channel, coal pillar and quick withdrawing device for working face end mining |
| CN109882177A (en) * | 2019-04-04 | 2019-06-14 | 中国矿业大学(北京) | Realize working face extraction, Liu Xiang, removal of home and Pillar Recovery coordinative operation method |
| CN110779483A (en) * | 2019-10-29 | 2020-02-11 | 青岛本末岩控技术有限公司 | Analysis method for distinguishing active shrinkage and passive shrinkage of movable column of hydraulic support |
| CN110779483B (en) * | 2019-10-29 | 2021-05-07 | 青岛本末岩控技术有限公司 | Analysis method for distinguishing active shrinkage and passive shrinkage of movable column of hydraulic support |
| CN113931686A (en) * | 2020-07-14 | 2022-01-14 | 天地科技股份有限公司 | Filling mining method and combined support for underground mineral mining |
| CN113931686B (en) * | 2020-07-14 | 2024-05-03 | 天地科技股份有限公司 | Filling mining method for underground mineral mining and combined bracket |
| CN114183181A (en) * | 2021-12-21 | 2022-03-15 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Advanced support method for return airway of large dynamic pressure fully mechanized mining face |
| CN114352318A (en) * | 2022-01-07 | 2022-04-15 | 国家能源集团宁夏煤业有限责任公司 | Method for advanced support of return airway of fully mechanized caving face |
| CN114352318B (en) * | 2022-01-07 | 2023-10-24 | 国家能源集团宁夏煤业有限责任公司 | Method for advanced support of fully-mechanized caving face air return roadway |
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