CN103161480B - Initiatively support the method for roadside packing gob side entry retaining - Google Patents
Initiatively support the method for roadside packing gob side entry retaining Download PDFInfo
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- CN103161480B CN103161480B CN201310080715.8A CN201310080715A CN103161480B CN 103161480 B CN103161480 B CN 103161480B CN 201310080715 A CN201310080715 A CN 201310080715A CN 103161480 B CN103161480 B CN 103161480B
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Abstract
One disclosed by the invention initiatively supports roadside packing gob-side entry retaining method, first according to wall rock condition first advance, support in mine gateway and strengthening supporting are carried out to reservation tunnel, at work plane rear, edge along goaf adopts grillage, spoil or blockwork etc. construct roadside packing wall, filling wall is laid high-strength sealing filling bag, in filling bag, note by grouting pump the cement filling interpolation fast coagulating early strength agent and coagulate slurries or high expanding material, strengthening supporting is removed after work plane rear portion roof movement is stable, make high-strength sealing filling bag and top board close contact, formed and initiatively support force is applied to top board.By providing roadside packing wall setting load, what strengthen road-in packing cuts top ability, and reduces the initial deflection staying lane top board, improves the stability of top board, improves gob side entry retaining quality, reduces the repair rate retaining tunnel.Its method is simple, easy to operate, effective.
Description
Technical field
The present invention relates to Coal Mining Technology field, particularly relate to a kind of method that the roadside packing gob side entry retaining of initiatively supporting role can be provided.
Background technology
Gob side entry retaining is reasonably 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 the existing analysis without 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 about 30%, and some mine reduces amplitude up to more than 40%.Edge air gallery technology significantly can reduce mine laneway driving amount, alleviates excavation replacement anxiety, shortens the face moving time, prevent from getting angry, and extends mine service-life etc.This technology is that the gas control solving highly gassy mine is provided convenience and possibility simultaneously, and improve the safety of pit mining, have 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 twice mining influence, and its ore deposit pressure manifests and roadway maintenance all more complicated, and the maintenance difficulties in tunnel is also large.The development of research and extension to China coal industry of edge air gallery technology has positive and important meaning on the whole, and 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, in gob side entry retaining basic research, do a large amount of work both at home and abroad, analyze gob side entry retaining surrouding rock stress state and " supporting one country rock " interaction relationship more all sidedly.Also carried out many-sided exploration in the application aspect of edge air gallery technology, have accumulated rich experience, from girdle to high seam, from gently inclined seam to half-edge coal seam, all oneself has the application experience of gob side entry retaining.But roadside support, as a difficult point of gob side entry retaining, is but never solved well in China.The success of edge air gallery technology should be support in mine gateway and the symphyogenetic result of roadside support, 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 lane.
In the development of at home and abroad edge air gallery technology, apply 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 belong to passive stressed, progressively produces and improve support force in sinking under the top plate, thus stops further sinking and the deformation failure of top board.According to the general principle that face roof controls, active enabling capabilities (setting load) tool important function in roof stability controls of support, the setting load improving support is the important content of management in workface always.Force analysis for gob side entry retaining is known, and support action and the force piece of road-in packing are similar, therefore adopts the roadside support with certain setting load for raising gob side entry retaining quality, reduces repair rate and have important function.
Summary of the invention
Technical problem: the object of the invention is the deficiency overcome in prior art, there is provided a kind of and initiatively support roadside packing gob-side entry retaining method, cut top ability by what strengthen road-in packing, and reduce to stay the initial deflection of lane top board, thus improve the stability of top board.
Technical scheme: the method initiatively supporting roadside packing gob side entry retaining of the present invention, comprises the steps:
A, on the basis of original support in mine gateway, in the reservation tunnel in coal-face front, adopt hydraulic prop to add articulated roof beam group carry out strengthening supporting;
B, to close in the goaf at coal-face rear portion and retain side, tunnel, what adopt grillage, spoil or blockwork to construct to close on ceiling height stays lane filling wall, then in the high-strength sealing filling bag staying lane filling wall to close on to lay between ceiling height pressure-bearing to be greater than 10MPar;
C, to be injected in high-strength sealing filling bag by grouting pump and be added with accelerated cement and coagulate slurries, make high-strength sealing filling bag and top board close contact, formed and initiatively support force is applied to top board, after coal-face rear portion roof movement is stable, removes hydraulic prop adds articulated roof beam group.
The height of described high-strength sealing filling bag is not less than 1/10 of filling wall height.
Beneficial effect: of the present inventionly initiatively support roadside packing gob-side entry retaining method, by providing roadside packing wall setting load, what strengthen road-in packing cuts top ability, and reduce the initial deflection staying lane top board, improve the stability of top board, improve gob side entry retaining quality, reduce the repair rate retaining tunnel.In stope front, support in mine gateway is carried out to reservation tunnel according to wall rock condition, at work plane rear portion, follow the advance of the face and carry out roadside support.Described support in mine gateway mode can adopt i iron trapezoidal rigid metal support, the trapezoidal Yieldable steel support of i iron, U-shaped steel Yieldable steel support, bolt support, bolt-mesh-anchor support, or with the associating of two or more form above-mentioned; Described roadside support coordinates the first support arrangement of high pressure to form by roadside packing wall; First grillage, spoil or blockwork etc. is adopted to build up described roadside packing wall, then on filling wall, lay high pressure just support arrangement, described high pressure just support arrangement adopts high-strength sealing filling bag to make, in it, note fills the cement adding fast coagulating early strength agent and coagulates slurries, by strengthen road-in packing cut top ability, reduce the initial deflection staying lane top board, thus improve the stability of top board, improve gob side entry retaining quality, reduce the repair rate retaining tunnel.Pumping rapid hardening bulging material also can be adopted to build filling wall for roadside packing or other high setting load filling wall substitutes.By initiatively supporting roadside packing gob side entry retaining, be conducive to the result of use improving edge air gallery technology.Its method is simple, easy to operate, effective, has practicality widely.
Accompanying drawing explanation
Fig. 1 is gob side entry retaining work plane floor map of the present invention;
Fig. 2 is gob side entry retaining tunnel of the present invention 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 articulated roof beam group, and 5 retain tunnel, 6 support in mine gateway, 7 anchor cables, 8 stay lane roof strata, 9 anchor poles, 10 frame canopies, 11 stay lane filling wall, 12 high-strength sealing filling bag, and 13 filling bag notes fill interface.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Of the present inventionly initiatively support roadside packing gob-side entry retaining method, comprise three aspects: retain tunnel support in mine gateway and strengthening supporting, construct the filling wall that retains tunnel and apply setting load to retaining back.Concrete operation step is as follows:
A, first according to staying the condition of lane roof strata 8, and the Rule of roof movement of coal in goaf 2, takes support in mine gateway 6 will retain in tunnel, frame canopy 10 or anchor pole 9 can be adopted to carry out support in mine gateway, for the support pattern that breaking roof can adopt both to combine.Adopt frame canopy 10 according to a conventional method, support in mine gateway 6 that anchor pole 9 pairs of roadway workfaces carry out, shed shoring 10 comprises any one in i iron trapezoidal rigid metal support, 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 on the basis of original support in mine gateway, in the reservation tunnel 5 in coal-face 1 front, adopt hydraulic prop to add articulated roof beam group 4 carry out strengthening supporting, in the work progress retaining tunnel 5, should carry out strengthening supporting by coal-face 1 in advance, crossover distance should be greater than lead abutment pressure influence basin; The length that coal-face 1 rear retains strengthening supporting is not less than 50m, when roof movement hysteresis range is larger, retains strengthening supporting segment length and should exceed roof movement delay distance;
After b, coal-face 1 advance 1 ~ 2 to circulate, under the protection of strengthening supporting and support in mine gateway 6, close in the goaf 2 at coal-face 1 rear portion and retain the filling wall that reservation tunnel is constructed in side, tunnel 5, adopt grillage, spoil or blockwork roadside packing band 3 construct close on ceiling height stay lane filling wall 11, then in the high-strength sealing filling bag 12 staying lane filling wall 11 to close on to lay between ceiling height pressure-bearing to be greater than 10MPar; Stay one of lane filling wall 11 to build by laying bricks or stones after circulation terminates, in the space between filling wall 11 and roof strata 8, lay high pressure sealing filling bag 12;
C, adopt grouting pump to fill interface 13 by filling bag note to inject in high-strength sealing filling bag 12 and be added with accelerated cement and coagulate slurries, setting load is applied to top board, note pressurising power is not less than 1MPa, after enriching, filling bag height is not less than 1/10 of filling wall 11 height, in filling bag after grout cures, form the good body of wall of overall tightness, active support is formed to top board; After coal-face 1 rear portion roof movement is stablized, dismounting hydraulic prop adds the strengthening supporting that articulated roof beam group 4 is carried out.
Claims (1)
1. initiatively support a method for roadside packing gob side entry retaining, it is characterized in that, retain tunnel support in mine gateway and strengthening supporting, construct the filling wall that retains tunnel and apply setting load to retaining back, step is as follows:
A, basis stay the condition of lane roof strata (8), and the Rule of roof movement of coal in goaf (2), on the basis of original support in mine gateway (6), in the reservation tunnel (5) in coal-face (1) front, adopt hydraulic prop to add articulated roof beam group (4) carry out strengthening supporting; In the work progress retaining tunnel (5), carry out strengthening supporting to advanced coal-face (1), crossover distance should be greater than lead abutment pressure influence basin; The length that coal-face (1) rear retains strengthening supporting is not less than 50m, when roof movement hysteresis range is larger, retains strengthening supporting segment length and should exceed roof movement delay distance;
After b, coal-face (1) advance 1 ~ 2 circulation, under the protection of strengthening supporting and support in mine gateway (6), close in the goaf (2) at coal-face (1) rear portion and retain tunnel (5) side, what adopt grillage, spoil or blockwork to construct to close on ceiling height stays lane filling wall (11), staying one of lane filling wall (11) to build by laying bricks or stones after circulation terminates, closing on the high-strength sealing filling bag (12) of to lay pressure-bearing between ceiling height and being greater than 10MPa staying lane filling wall (11);
C, be added with accelerated cement by grouting pump coagulate slurries to injecting in high-strength sealing filling bag (12), make high-strength sealing filling bag (12) and top board close contact, formed and initiatively support force is applied to top board, note pressurising power is not less than 1MPa, the height of described high-strength sealing filling bag (12) is not less than 1/10 of filling wall height, in filling bag after grout cures, form the good body of wall of overall tightness, active support is formed to top board; After coal-face (1) rear portion roof movement is stable, removes hydraulic prop adds articulated roof beam group (4).
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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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| CN103161480A CN103161480A (en) | 2013-06-19 |
| CN103161480B true CN103161480B (en) | 2015-12-09 |
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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 |
| CN104213920A (en) * | 2014-08-25 | 2014-12-17 | 中国矿业大学 | Bag type filling method for suspension brackets |
| CN104265295B (en) * | 2014-09-11 | 2017-06-27 | 四川达竹煤电（集团）有限责任公司铁山南煤矿 | Medium Thickness And Medium Slope Angle coal seam prosthetic roadside packing and without coal column gob-side entry retaining method |
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| CN105370307B (en) * | 2015-10-08 | 2018-12-11 | 山西晋城无烟煤矿业集团有限责任公司 | Coal working face crosses freeboard section support process |
| CN105735995B (en) * | 2016-02-02 | 2017-11-14 | 山东科技大学 | A kind of loose roof cuts the gob-side entry retaining method under top |
| CN105673039B (en) * | 2016-02-02 | 2017-11-14 | 安徽理工大学 | Soft strong carrying constructing structure and its construction method by a kind of gob side entry retaining lane |
| 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 |
| CN108678769B (en) * | 2018-05-16 | 2020-03-06 | 山东科技大学 | Anchor grouting and roof cutting main control entry retaining method for deep mining tunnel |
| CN109653778B (en) * | 2018-07-20 | 2021-03-02 | 天地科技股份有限公司 | High-strength support system and method for working face retraction channel |
| CN109209495B (en) * | 2018-09-13 | 2020-08-04 | 天地科技股份有限公司 | Roof cutting and pressure relief protection method on stoping surface of fully mechanized coal mining face |
| CN109779652B (en) * | 2018-12-03 | 2021-02-02 | 李洪彪 | Method for expanding, repairing and supporting air return roadway of soft rock working face of coal mine |
| CN111255514B (en) * | 2020-03-29 | 2021-09-28 | 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 |
| 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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