CN103161480A - Method for actively supporting lane side filling gob-side entry retaining - Google Patents
Method for actively supporting lane side filling gob-side entry retaining Download PDFInfo
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- CN103161480A CN103161480A CN2013100807158A CN201310080715A CN103161480A CN 103161480 A CN103161480 A CN 103161480A CN 2013100807158 A CN2013100807158 A CN 2013100807158A CN 201310080715 A CN201310080715 A CN 201310080715A CN 103161480 A CN103161480 A CN 103161480A
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Abstract
The invention discloses a method for actively supporting a lane side filling gob-side entry retraining. Firstly, a lane interior support and an enforcing support are built on a reserved lane according to a sounding rock condition and a working face. On the back of the working face, nogs, gangues or blockworks and the like are adopted to build a lane side filling wall along the edge of a gob. High-strength and sealed filling bags are paved on the filling wall, and high-expanding materials or cement coagulation serous fluid added with a rapid hardening early strength agent is filled into the filling bags through a grouting pump. The enforcing support is dismounted after a top plate behind the working face is movably stabilized, the high-strength and sealed filling bags are enabled to be contacted tightly with the top plate, and active support force is formed to be exerted on the top plate. By means of the active support force provided for the lane side filing wall, the top cutting capacity of a lane side filling body is enhanced, initial deflection of the entry retaining top plate is reduced, the stability of the top plate is improved, the quality of the gob-side entry retaining is improved, and repair rate of the gob-side entry retaining is reduced. The method is simple, convenient to operate and good in effect.
Description
Technical field
The present invention relates to the Coal Mining Technology field, particularly relate to and a kind ofly can provide the initiatively method of the roadside packing gob side entry retaining of supporting role.
Background technology
Gob side entry retaining is reasonably to develop a kind of effective way of existing coal resources, raising coal resources recovery ratio as a kind of non chain pillar entryprotection technology.According to existing analysis without the coal pillar mining system, gob side entry retaining generally can make the mine rate of extraction improve more than 10%, and tunnelling rate and road maintenance expense can reduce by 30% left and right, and some mine reduces amplitude up to more than 40%.Edge air gallery technology can significantly reduce mine laneway driving amount, the alleviation digging is taken over anxiety, shortens the face moving time, prevented from getting angry, and extends mine service-life etc.This technology is provided convenience and possibility for the gas control that solves highly gassy mine simultaneously, and the safety that has improved pit mining has obvious technology and economic benefit, is a major reform of coal mining and stope drift active workings support technology.Its shortcoming is that gob side entry retaining will stand mining influence twice, and its ore deposit is pressed and manifested and roadway maintenance more complicated all, and the maintenance difficulties in tunnel is also large.The research and extension of edge air gallery technology has positive and important meaning to the development of China coal industry on the whole, no matter still in the future now, this technology is all the important development direction of coal resources in China exploitation.
Up to the present, do a large amount of work aspect the gob side entry retaining basic research both at home and abroad, analyzing more all sidedly gob side entry retaining surrouding rock stress state and " supporting one country rock " interaction relationship.Application facet at edge air gallery technology has also been carried out many-sided exploration, has accumulated rich experience, and from the girdle to the high seam, from the gently inclined seam to the half-edge coal seam, all oneself has the application experience of gob side entry retaining.But roadside support is but never solved in China well as a difficult point of gob side entry retaining.The success of edge air gallery technology should be supporting and the symphyogenetic result of roadside support in the lane, wherein roadside support is the key of gob-side entry retaining support technology, the key of edge air gallery technology success or failure is roof moves regulations that can roadside support adapt to gob side entry, effectively controls the deformation failure that country rock is stayed in the lane.
At home and abroad in the development of edge air gallery technology, use wider roadside support and mainly contain: grillage roadside support, close standing props roadside support, waste pack roadside support, artificial building block roadside support and pumping filling roadside support technology etc.One of common feature of existing roadside support is exactly all to belong to passive stressed, progressively produces in crushing and improves support force, thereby stoping further sinking and the deformation failure of top board.According to the basic principle that face roof is controlled, the active enabling capabilities (setting load) of support is the tool important function in roof stability is controlled, and the setting load that improves support is the important content of work plane management always.For the force analysis of gob side entry retaining as can be known, support action and the force piece of roadside packing body are similar, therefore adopt the roadside support with certain setting load for improving the gob side entry retaining quality, reduce repair rate and have important function.
Summary of the invention
Technical problem: the objective of the invention is to overcome the deficiency in prior art, a kind of roadside packing gob-side entry retaining method that initiatively supports is provided, by strengthening the top ability of cutting of roadside packing body, and reduce to stay the initial deflection of lane top board, thereby improve the stability of top board.
Technical scheme: the method that initiatively supports the roadside packing gob side entry retaining of the present invention comprises the steps:
On the basis of a, supporting in original lane, adopt hydraulic prop to add the articulated roof beam group in the reservation tunnel in coal-face the place ahead and add strong supporting;
B, close in the goaf at coal-face rear portion and keep tunnel one side, that adopts grillage, spoil or blockwork to construct to close on the top board height stays lane filling wall, then lays pressure-bearing between the top board height greater than the high-strength sealing filling bag of 10MPar staying lane filling wall to close on;
C, inject in the high-strength sealing filling bag by grouting pump and be added with the solidifying slurries of accelerated cement, make high-strength sealing filling bag and top board close contact, formation applies initiatively support force to top board, adds the articulated roof beam group until the stable rear hydraulic prop of removing of coal-face rear portion roof movement.
The height of described high-strength sealing filling bag is not less than 1/10 of filling wall height.
Beneficial effect: the roadside packing gob-side entry retaining method that initiatively supports of the present invention, by roadside packing wall setting load is provided, strengthen the top ability of cutting of roadside packing body, and reduce to stay the initial deflection of lane top board, improve the stability of top board, improve the gob side entry retaining quality, reduce to keep the repair rate in tunnel.Carry out lane in supporting in stope the place ahead to keeping the tunnel according to wall rock condition, at the work plane rear portion, follow the advance of the face and carry out roadside support.In described lane, support pattern can adopt the trapezoidal rigid metal support of i iron, the trapezoidal Yieldable steel support of i iron, U-shaped steel Yieldable steel support, bolt support, the supporting of anchor rete cord, perhaps with the associating of above-mentioned two or more form; Described roadside support coordinates the first support arrangement of high pressure to be formed by the roadside packing wall; At first adopt grillage, spoil or blockwork etc. to build up described roadside packing wall, then lay just support arrangement of high pressure on the filling wall, described high pressure just support arrangement adopts the high-strength sealing filling bag to make, annotate in it and fill the solidifying slurries of the cement that adds fast coagulating early strength agent, by strengthening the top ability of cutting of roadside packing body, reduced to stay the initial deflection of lane top board, thereby improved the stability of top board, improve the gob side entry retaining quality, reduced to keep the repair rate in tunnel.Roadside packing also can adopt pumping rapid hardening bulging material to build the filling wall or other high setting load filling wall substitutes.By initiatively supporting the roadside packing gob side entry retaining, be conducive to improve the result of use of edge air gallery technology.Its method is simple, and is easy to operate, effective, has practicality widely.
Description of drawings
Fig. 1 is gob side entry retaining work plane floor map of the present invention;
Fig. 2 is gob side entry retaining of the present invention tunnel cross-sectional view;
Fig. 3 is high pressure sealing filling bag structure chart of the present invention.
In figure: 1 coal-face, 2 goafs, 3 roadside packing bands, 4 hydraulic props add the articulated roof beam group, and 5 keep the tunnel, supporting in 6 lanes, 7 anchor cables, 8 stay the lane roof strata, 9 anchor poles, 10 canopies, 11 stay lane filling wall, and 12 high-strength sealing filling bag, 13 filling bag are annotated and are filled interface.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The roadside packing gob-side entry retaining method that initiatively supports of the present invention comprises three aspects: keep in the lane, tunnel supporting and add strong supporting, construct the filling wall that keeps the tunnel and the reservation back is applied setting load.Concrete operation step is as follows:
A, at first according to staying the condition of lane roof strata 8, and the Rule of roof movement of coal in goaf 2 is taked supporting 6 in the lane will keep in the tunnel, can adopt frame canopy 10 or anchor pole 9 to carry out supporting in the lane, can adopt the support pattern of both combinations for breaking roof.Adopt according to a conventional method supporting 6 in the lane that frame canopy 10,9 pairs of roadway workfaces of anchor pole carry out, shed shoring 10 comprises any in the trapezoidal rigid metal support of i iron, the trapezoidal Yieldable steel support of i iron, U-shaped steel Yieldable steel support; Bolt support 9 can be equipped with anchor cable 7 and wire lath carries out supporting; Namely in original lane on the basis of supporting, add articulated roof beam group 4 at the reservation tunnel in coal-face 1 the place ahead 5 interior employing hydraulic props and add strong supporting, in the work progress that keeps tunnel 5, coal-face 1 adds strong supporting in advance, and crossover distance should be greater than leading bearing pressure influence basin; Coal-face 1 rear keeps the length that adds strong supporting and is not less than 50m, and when roof movement hysteresis scope was larger, reservation added the strong supporting segment length and should surpass the roof movement delay distance;
After b, coal-face 1 advance 1～2 circulation, within adding strong supporting and lane under the protection of supporting 6, close in the goaf 2 at coal-face 1 rear portion and keep tunnel 5 one sides and construct the filling wall that keeps the tunnel, adopt grillage, spoil or blockwork roadside packing band 3 construct close on the top board height stay lane filling wall 11, then lay pressure-bearing between the top board height greater than the high-strength sealing filling bag 12 of 10MPar staying lane filling wall 11 to close on; Stay of lane filling wall 11 to build by laying bricks or stones after circulation finishes, laying high pressure sealing filling bag 12 in the space of 8 of filling wall 11 and roof stratas;
C, adopt grouting pump to annotate by filling bag to fill interface 13 and be added with accelerated cement to the interior injection of high-strength sealing filling bag 12 and coagulate slurries, top board is applied setting load, annotate pressurising power and be not less than 1MPa, after enriching, the filling bag height is not less than 1/10 of filling wall 11 height, after in filling bag, slurries solidify, form overall tightness body of wall preferably, top board is formed active support; Remove after coal-face 1 rear portion roof movement is stable with hydraulic prop and add the strong supporting that adds that articulated roof beam group 4 carries out.
Claims (2)
1. a method that initiatively supports the roadside packing gob side entry retaining, is characterized in that, comprises the steps:
On the basis of a, supporting in original lane (6), adopt hydraulic prop to add articulated roof beam group (4) in the reservation tunnel (5) in coal-face (1) the place ahead and add strong supporting;
B, close in the goaf (2) at coal-face (1) rear portion and keep tunnel (5) one sides, that adopts grillage, spoil or blockwork to construct to close on the top board height stays lane filling wall (11), then lays pressure-bearing between the top board height greater than the high-strength sealing filling bag (12) of 10MPar staying lane filling wall (11) to close on;
C, inject in the high-strength sealing filling bag (12) by grouting pump and be added with the solidifying slurries of accelerated cement, make high-strength sealing filling bag (12) and top board close contact, formation applies initiatively support force to top board, adds articulated roof beam group (4) until the stable rear hydraulic prop of removing of coal-face (1) rear portion roof movement.
2. the method for high setting load roadside packing gob side entry retaining described according to right 1, it is characterized in that: the height of described high-strength sealing filling bag (12) is not less than 1/10 of filling wall height.
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| CN201310080715.8A CN103161480B (en) | 2013-03-14 | 2013-03-14 | Initiatively support the method for roadside packing gob side entry retaining |
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| CN201310080715.8A CN103161480B (en) | 2013-03-14 | 2013-03-14 | Initiatively support the method for roadside packing gob side entry retaining |
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| CN103161480B CN103161480B (en) | 2015-12-09 |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485820A (en) * | 2013-10-09 | 2014-01-01 | 山东科技大学 | Filling wall body capable of protecting laneway through soft yielding in non-chain-pillar filling mining and construction method thereof |
| CN104213920A (en) * | 2014-08-25 | 2014-12-17 | 中国矿业大学 | Bag type filling method for suspension brackets |
| CN104265295A (en) * | 2014-09-11 | 2015-01-07 | 四川达竹煤电（集团）有限责任公司铁山南煤矿 | Non-artificial roadway filling and non-coal-pillar gob-side entry retaining method for inclined medium-thickness coal seam |
| CN104405436A (en) * | 2014-09-25 | 2015-03-11 | 白银有色集团股份有限公司 | Method for improving orebody rate of supporting pit roof |
| CN105370307A (en) * | 2015-10-08 | 2016-03-02 | 山西晋城无烟煤矿业集团有限责任公司 | Support technology for coal face to pass through superelevation section |
| CN105673039A (en) * | 2016-02-02 | 2016-06-15 | 安徽理工大学 | Gob-side entryretaining roadway-side flexible and high-strength material bearing construction structure and construction method thereof |
| CN105735995A (en) * | 2016-02-02 | 2016-07-06 | 山东科技大学 | Gob-side roadway retaining method based on roof cutting of soft roof plate |
| CN106353199A (en) * | 2016-10-20 | 2017-01-25 | 山东科技大学 | Method for field real-time monitoring of creep type rock burst risk |
| CN108678769A (en) * | 2018-05-16 | 2018-10-19 | 山东科技大学 | Deep Gateway anchor note cuts top master control and stays lane method |
| CN109209495A (en) * | 2018-09-13 | 2019-01-15 | 天地科技股份有限公司 | The stopping of a kind of fully-mechanized mining working cutting top unloading pressure protection method on the face of adopting |
| CN109653778A (en) * | 2018-07-20 | 2019-04-19 | 天地科技股份有限公司 | A kind of working face return channel high strength support system and method |
| CN109779652A (en) * | 2018-12-03 | 2019-05-21 | 李洪彪 | A kind of expansion of coal-mine soft-rock tailentry is repaired and method for protecting support |
| CN111255514A (en) * | 2020-03-29 | 2020-06-09 | 新汶矿业集团有限责任公司 | Deep non-roadside filling gob-side entry retaining supporting structure and supporting method |
| CN111550283A (en) * | 2020-07-06 | 2020-08-18 | 西安科技大学 | Method for reducing damage by alternately laying gangue filling and bag grouting combined support |
| CN111734482A (en) * | 2020-07-06 | 2020-10-02 | 西安科技大学 | Method for reducing damage by utilizing gangue cementation and bag grouting combined support |
| CN112610218A (en) * | 2020-12-02 | 2021-04-06 | 中国矿业大学(北京) | Thick coal seam fully-mechanized top-tunneling top-cutting pressure relief automatic roadway forming method |
| CN112796757A (en) * | 2021-01-26 | 2021-05-14 | 扬州中矿建筑新材料科技有限公司 | Method for high-water filling material roadside filling gob-side entry retaining |
| CN113309520A (en) * | 2021-07-14 | 2021-08-27 | 辽宁工程技术大学 | Reconstructed surrounding rock for advanced pre-splitting roof cutting gob-side entry retaining and construction method |
| CN113550763A (en) * | 2021-08-24 | 2021-10-26 | 西安科技大学 | Support structure for quickly constructing gob-side entry retaining and construction method thereof |
| CN113638751A (en) * | 2021-09-03 | 2021-11-12 | 中煤能源研究院有限责任公司 | Prefabricated pier stud reinforced roadway support method |
| CN113685209A (en) * | 2021-09-30 | 2021-11-23 | 太原理工大学 | Mining bottom plate deformation self-adaptive type multi-stage high-strength filling column cylinder and using method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8257477B1 (en) * | 2009-09-08 | 2012-09-04 | Hart Scott A | Dust control system |
| CN102705002A (en) * | 2012-05-12 | 2012-10-03 | 山东科技大学 | Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
| CN102865102A (en) * | 2012-09-26 | 2013-01-09 | 山西焦煤集团有限责任公司 | Self-flowing concrete convex and concave self-connection filling method |
-
2013
- 2013-03-14 CN CN201310080715.8A patent/CN103161480B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8257477B1 (en) * | 2009-09-08 | 2012-09-04 | Hart Scott A | Dust control system |
| CN102705002A (en) * | 2012-05-12 | 2012-10-03 | 山东科技大学 | Roadside proper yielding unequal combined filling structure of gob-side entry retaining and construction method |
| CN102865102A (en) * | 2012-09-26 | 2013-01-09 | 山西焦煤集团有限责任公司 | Self-flowing concrete convex and concave self-connection filling method |
Non-Patent Citations (2)
| Title |
|---|
| 华心祝: "巷旁充填沿空留巷技术在我国煤矿的应用", 《煤》 * |
| 李永平，欧阳广斌: "高水速凝水泥材料巷旁充填技术的应用", 《煤矿开采》 * |
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| CN103485820B (en) * | 2013-10-09 | 2016-03-30 | 山东科技大学 | Ya Hu lane filled wall and construction method thereof is allowed without coal column filling mining flexibility |
| CN103485820A (en) * | 2013-10-09 | 2014-01-01 | 山东科技大学 | Filling wall body capable of protecting laneway through soft yielding in non-chain-pillar filling mining and construction method thereof |
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| CN104405436B (en) * | 2014-09-25 | 2016-08-24 | 白银有色集团股份有限公司 | A kind of method improving ore body Tight filling rate |
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| CN106353199A (en) * | 2016-10-20 | 2017-01-25 | 山东科技大学 | Method for field real-time monitoring of creep type rock burst risk |
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| CN109653778A (en) * | 2018-07-20 | 2019-04-19 | 天地科技股份有限公司 | A kind of working face return channel high strength support system and method |
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| CN112610218B (en) * | 2020-12-02 | 2022-05-13 | 中国矿业大学(北京) | Thick coal seam fully-mechanized top-tunneling top-cutting pressure relief automatic roadway forming method |
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