CN101775991B - 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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- CN101775991B CN101775991B CN2010100100849A CN201010010084A CN101775991B CN 101775991 B CN101775991 B CN 101775991B CN 2010100100849 A CN2010100100849 A CN 2010100100849A CN 201010010084 A CN201010010084 A CN 201010010084A CN 101775991 B CN101775991 B CN 101775991B
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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and when the advancement length in the face exploitation is 1.5-2.5 times longer than the face length, the brackets are withdrawn from the beginning of the air return roadway of the working area along the bracket withdrawing direction, and the withdrawn brackets are continuously arranged in the track gate along the bracket arranging direction so as to be recycled in the advance support of the mining face.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 through 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, lean on goaf one side to install close standing props, 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 is high, 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 " excavation support " greatly; As follows); Be the full section continuous supporting of excavation support method, solve an above-mentioned difficult problem, have 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 excavation support supporting tunnel, one group of excavation 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 group of excavation support that will be in work plane is as the center line of force piece, installation work face support;
(4) every group of excavation support is transported into the installation site by work plane track crossheading integral body, and excavation support is installed center line should be parallel to work plane, along with the excavation support installation is provided with the support back immediately, reaches setting load; The spacing of the column of the same position of every group of adjacent excavation support is not more than 1.5 times of every group of excavation 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 confirm according to ahead work face supporting design;
(6) exploitation with work plane advances, and excavation support uninterruptedly is installed; The excavation support of installing earlier guarantees to reach yield load after progressively getting into the goaf scope, 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 in the return aircourse, exploiting field and withdraw from excavation support from excavation support; The excavation support of withdrawing from continues the injection crossheading at the excavation support approach axis, in the ahead work face supporting, recycles; 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 hydraulic pressure excavation support tendency to arrange the supporting tunnel, it is big that this technology has effectively improved the roadway support intensity post amount of contracting high, alive, 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 excavation support, stay the lane support to stay enough spaces, the staff can directly construct in excavation support, the more important thing is the personal safety that has guaranteed the constructor, has reduced accident.
3. since excavation support in the goaf scope stay the lane to keep enough length, stay can remove by the border return airway behind the stability of the roadway of lane and reclaim, so excavation support can recycle.
4. since excavation support according to the ahead work face supporting, the dismounting of excavation support is reclaimed to advance with working face mining and carried out synchronously, does not influence production.
5. because the supporting excavation support 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; Solved and stayed the lane to recover the work of caunching of to act as a planted agent in the construction, a difficult problem such as 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 sketch map is arranged in the supporting of fully-mechanized mining working gob side entry retaining excavation support;
Fig. 2 is that sketch map B-B sectional drawing is arranged in the supporting of fully-mechanized mining working gob side entry retaining excavation support.
Fig. 1 and Fig. 2 have mainly explained the arrangement and the position of force piece and excavation 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, excavation support 8, column 9 are installed, return airway 10, support are withdrawn from direction 11, air partition 12, filling area 13, anchor point 14 to the section boundary.
The specific embodiment
This coal cutting roadway support engineering directly adopts excavation support and tendency to arrange supporting tunnel technology.
So-called excavation 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: as at first to 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 group of excavation 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 excavation support 8 to arrange the supporting tunnel.Every group of excavation support 8 transported to the installation site by the track crossheading of work plane 3 along excavation support approach axis 7 integral body; Excavation support 8 is parallel to work plane 3 by its installation center line 4 and installs; Along with the installation of excavation support 8, simultaneously the support back is set immediately, reach setting load; The spacing of the column 9 of the same position of every group of excavation support 8 is not more than 1.5 times of every group of excavation support width; Just every group of excavation support 8 width are 2 meters basically, if be close between the two adjacent groups excavation support 8, so the spacing of the column 9 of the same position of every group of excavation support 8 also is 2 meters; If deposit between the two adjacent groups excavation support 8 at interval, so the spacing of the column 9 of the same position of every group of excavation support 8 also must not be above 3 meters.
It is to be mounted to track crossheading first advance 3 distances continuously by 8 beginnings of first group of excavation support not to be shorter than 30 meters～35 meters that excavation support 8 is installed; By 30 meters controls; Should be synchronous in comprehensive progress of adopting installation excavation support 8 in the production with pushing ahead of work plane 3; Promptly push ahead, excavation support 8 uninterruptedly is installed forward with exploitation work plane 3; Distance range for exceeding 35 meters should be confirmed according to ahead work face supporting design.
Along with work plane 3 is pushed ahead; First group of excavation support 8 and the first excavation support of installing 8 etc. progress into the goaf scope; Still guarantee to reach yield load, and slowly sink, because the amount of contracting of excavation support 8 is big with top board; Can reach more than the 1.6m, can adapt to the amount of crushing of staying the lane bigger; Avoided the supporting of use monomer because the amount of contracting is not enough, the problem of frequent change 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; Excavation support 8 is stable in the Liu Xiang tunnel in goaf; Can be in that 10 1 sides begin to withdraw from direction 11 from support and withdraw from excavation support 8 to the return aircourse, exploiting field, the excavation support of withdrawing from 8 is transported to the track crossheading that excavation support approach axis 7 continues to get into work planes 3, in work plane 3 advance supports, recycles.
Claims (2)
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 following:
⑴ fully-mechanized mining working all devices is introduced into open-off cut and installs, and possesses the start working condition;
⑵ the installation reference line of force piece stretches out the size of rib, is not more than 1/2 of force piece width;
⑶ directly adopt excavation support supporting tunnel, one group of excavation 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 group of excavation support that will be in the work plane back is as the center line of force piece, installation work face support;
⑷ every group of excavation support is transported into the installation site by work plane track crossheading integral body, and excavation support is installed center line should be parallel to work plane, along with the excavation support installation is provided with the support back immediately, reaches setting load; The spacing of the column of the same position of every group of adjacent excavation support is not more than 1.5 times of every group of excavation support width;
⑸ install excavation support and begin to be mounted to continuously 30 meters～35 meters of track crossheading first advance distance by first group of excavation support;
⑹ advance with the exploitation of work plane, and excavation support uninterruptedly is installed; The excavation support of installing earlier guarantees to reach yield load after progressively getting into the goaf scope, and slowly sinks with top board;
⑺ when advance length greater than 1.5～2.5 times of face length when working face mining; Begin to withdraw from direction in the return aircourse, exploiting field and withdraw from excavation support from excavation support; The excavation support of withdrawing from continues the injection crossheading at the excavation support approach axis, in the ahead work face supporting, recycles; Excavation support reclaims with working face mining and carries out synchronously.
2. according to the said 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: said installation excavation support is begun continuously to being mounted to track crossheading first advance distance by 30 meters controls by first group of excavation support.
3. according to the said 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: said working face mining advances length when being 1.5 times of face length, begins to withdraw from direction from excavation support in the return aircourse, exploiting field and withdraws from excavation 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 CN101775991A (en) | 2010-07-14 |
| CN101775991B true CN101775991B (en) | 2012-10-31 |
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Families Citing this family (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 |
| CN108222935B (en) * | 2015-06-24 | 2019-09-17 | 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 |
| CN107905790B (en) | 2015-06-24 | 2019-05-31 | 何满潮 | Broadwall N00 engineering 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 |
| CN109882177B (en) * | 2019-04-04 | 2022-03-08 | 中国矿业大学(北京) | Coordinated operation method for realizing working face recovery, roadway retaining, moving and coal pillar recovery |
| CN111779514B (en) * | 2019-04-04 | 2022-05-17 | 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 |
| 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 |
| 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 |
| 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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2010
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| 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 |
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