CN103437770A - Supporting method for excitation gap pressure relief soft rock roadway - Google Patents
Supporting method for excitation gap pressure relief soft rock roadway Download PDFInfo
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- CN103437770A CN103437770A CN201310264896XA CN201310264896A CN103437770A CN 103437770 A CN103437770 A CN 103437770A CN 201310264896X A CN201310264896X A CN 201310264896XA CN 201310264896 A CN201310264896 A CN 201310264896A CN 103437770 A CN103437770 A CN 103437770A
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Abstract
The invention discloses a supporting method for an excitation gap pressure relief soft rock roadway. The supporting method comprises the following steps of: (1) deeply digging a base angle foundation pit during roadway excavation; (2) blasting in the base angle foundation pit to vibrate an excitation gap to realize expansion of a surrounding rock fracture in a manual mode; (3) planting grouting anchors of different depths into the surrounding rock and injecting grout capable of cementing broken rocks into the surrounding rock fracture to realize reinforcement of the surrounding rock body; (4) suspending a connecting wire rope on the end part of the grouting anchors and spraying a cement spray layer as a sealing layer by taking the steel wire rope as a shin bone. According to the supporting method, the stability of the supporting structure is greatly improved, so that the safety of the soft rock roadway is improved.
Description
Technical field
The present invention relates to a kind of excitated gap decompressed soft rock laneway support method.
Background technology
At present, along with the expansion of coal mining scope, mining depth constantly increases, and mining conditions is more and more difficult, especially the stack pressure that under large buried depth, complicated structure and mining induced stress, weak rock coal self expands and brings to roadway support is the difficult problem of puzzlement colliery tunnel support always.Because the difference of the free speed of these pressure, the size and Orientation difference of power, be therefore while not waiting, inhomogeneous stack pressure combines.Roadway support, under this inhomogeneous stack pressure-acting, can be suffered repeatedly to destroy, and conventional support technology is difficult to guarantee the stable of tunnel.Roadway support is unstable, affects the safety in production during mine construction, bring potential safety hazard also can to later normal use.
Along with invention and the development of shotcrete technology, mid-term in last century, the U.S., Australia proposed to take so that suspention beam, compound beam, built-up arch are theoretical the support system that anchor pole is main body.The big coal countries such as Russia, Poland, Turkey still adopt dissimilar metallic support to process the supporting problem in tunnel so far.
At present, on the domestic basis drawing foreign technology, roadway support under large buried depth, tectonic stress, mining pressure and " weak rocks, coal body " self swelling stress mainly adopts two kinds of support patterns: a kind of is the composite support technology of whitewashing again after totally-enclosed canopy of the U-shaped steel of large model and frame canopy; Another kind is that high strength anchor bar adds anchor cable and adds anchor net spray composite support technology; Also once attempted macroplate and net sticks up support technology.These support technologies one are to solve well the stable problem of current difficult roadway support, the 2nd, and construction is complicated, the roadway support cost is high, and roadway support is repaired just more difficult again after destroying." weak rocks, coal body " support technology of latest domestic development is the method that adopts bolt grouting, utilize grouted anchor bar to inject the slurries with pressure in weak rocks, coal body, improve the intensity of coal and rock self, obtain effect preferably, but, because the slurries pressure injected in rock, coal body is difficult to lasting stability, still exist the unsettled problem of supporting effect.Publication number a kind of Weak rock coal supporting technology of superimposed stress of slow release of pressure-stabilizing gluing of tough blinding course that has been CN1963150A, the application number Patent Application Publication that is 200610162650.1, this technology is inserted grouted anchor bar in roadway surrounding rock, coal body, injection is with the cement grout of pressure, on the surface, tunnel, arranges to take the cement spray-up that wire rope is the footpath bone.The method can be on large buried depth, be subject to the tunnel under tectonic stress, mining pressure and " weak rocks, coal body " self swelling stress impact to play support action preferably.
On the basis of aforementioned patent applications, the present invention further improves, and makes supporting effect more stable.
Summary of the invention
Technical problem solved by the invention is to provide a kind of excitated gap decompressed soft rock laneway support method, thereby solves the problem in the above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of excitated gap decompressed soft rock laneway support method, comprise the steps:
(1) when the excavation tunnel, deep-cut the base angle foundation pit;
(2) blow out in the foundation pit of base angle and shake sharp gap, realize that manual type enlarges wall-rock crack;
(3) to implanting the grouted anchor bar of different depth in described country rock, and to inject in wall-rock crack can cementing fractured rock slurries, realize the reinforcement to the country rock body;
(4) end of grouted anchor bar is hung to connecting steel wire ropes, and using wire rope as the footpath bone, spray the cement spray-up as sealing.
As a kind of improvement, spray concrete in the foundation pit of described base angle and replaced.
At excavation during tunnel, deep-cut in the foundation pit of ， base angle, base angle and blow out vibrations and swash gap, and the base angle foundation pit is sprayed to concrete replaced.Excite the mode of wall-rock crack to have multiple, the embodiment of the present invention adopts and deep-cuts the basis, base angle, blows out the method for vibrations in the foundation pit of base angle.This mode easy construction, vibrations, can be played and swash preferably the gap effect to the roadway surrounding rock transmission by base angle.Deep-cutting base angle is the better mode of a kind of pressure release and sharp gap, because base angle is positioned at the crosspoint in tunnel, stress is concentrated, and by being conducive to the concentrated release of surrouding rock stress herein after hollowing out, in the process of stress release, wall-rock crack enlarges naturally.In addition, be chosen in base angle and blow out, can also prevent the collapse accident that the top, tunnel is caused by vibrations directly.
It is incomplete for crack and the cleavage surface development of soft rock mass swashing the gap technology, take corresponding measure to increase the plane of weakness in country rock and improve its voidage, be beneficial to the stress of primary rock in the situation that the current through line of artificial controlled release and grouting serous fluid is unobstructed, thereby reach the cementing scope of country rock after discharging the country rock internal stress and improving slip casting, the purpose of stabilizing surrounding rock.The key link of bolt-grouting support technology be exactly by wall-rock crack, inject can cementing fractured rock slurries, realize the reinforcement to the country rock body, thereby crack and the effect that cleavage surface is excited of rock is better in practice, the cementing strength of country rock will be higher.
Another Main Function that swashs gap is pressure release.General roadway support can only partly have higher supporting role to wall rock loosening, for the retention stress in country rock, is difficult to support.Under the equilibrium state begun to take shape at induced stress field of surrounding rock, in the supporting later stage, keeping stability of the roadway, require to large extent the stress in the country rock body to be discharged, initiatively pressure release is just very necessary therefore to take certain measure.The transmission of rock mass internal stress need be certain path, and the crack in rock mass, this approach of stress flow warp just, in general, corresponding crack is abundanter, it is just faster that stress is lost.
Owing to having adopted above structure, the present invention has following beneficial effect:
The present invention has improved the stability of supporting and protection structure greatly, thereby has improved the safety of soft-rock tunnel.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, under meet personally specific embodiment, further set forth the present invention.
Embodiment
A kind of excitated gap decompressed soft rock laneway support method, comprise the steps:
(1) when the excavation tunnel, deep-cut the base angle foundation pit;
(2) blow out in the foundation pit of base angle and shake sharp gap, realize that manual type enlarges wall-rock crack;
(3) to implanting the grouted anchor bar of different depth in described country rock, and to inject in wall-rock crack can cementing fractured rock slurries, realize the reinforcement to the country rock body;
(4) end of grouted anchor bar is hung to connecting steel wire ropes, and using wire rope as the footpath bone, spray the cement spray-up as sealing.
In the present embodiment, spray concrete in the foundation pit of described base angle and replaced.
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and manual, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. an excitated gap decompressed soft rock laneway support method, is characterized in that: comprise the steps:
(1) when the excavation tunnel, deep-cut the base angle foundation pit;
(2) blow out in the foundation pit of base angle and shake sharp gap, realize that manual type enlarges wall-rock crack;
(3) to implanting the grouted anchor bar of different depth in described country rock, and to inject in wall-rock crack can cementing fractured rock slurries, realize the reinforcement to the country rock body;
(4) end of grouted anchor bar is hung to connecting steel wire ropes, and using wire rope as the footpath bone, spray the cement spray-up as sealing.
2. a kind of excitated gap decompressed soft rock laneway support method according to claim 1, is characterized in that: spray concrete in the foundation pit of described base angle and replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264896XA CN103437770A (en) | 2013-06-25 | 2013-06-25 | Supporting method for excitation gap pressure relief soft rock roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264896XA CN103437770A (en) | 2013-06-25 | 2013-06-25 | Supporting method for excitation gap pressure relief soft rock roadway |
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| CN103437770A true CN103437770A (en) | 2013-12-11 |
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| CN201310264896XA Pending CN103437770A (en) | 2013-06-25 | 2013-06-25 | Supporting method for excitation gap pressure relief soft rock roadway |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899330A (en) * | 2014-04-15 | 2014-07-02 | 中国矿业大学(北京) | Method for relieving pressure of high confining pressure roadway full fracture face quirk |
| CN104895580A (en) * | 2015-05-14 | 2015-09-09 | 张晓德 | Soft rock roadway surrounding rock self-support method and support stirring injection drilling machine |
| CN113374498A (en) * | 2021-07-20 | 2021-09-10 | 淮北市平远软岩支护工程技术有限公司 | High rock burst roadway support system based on underground soft rock replacement technology |
| CN113605927A (en) * | 2021-09-03 | 2021-11-05 | 淮北市平远软岩支护工程技术有限公司 | Support method for soft rock roadway surrounding rock under high rock burst stress |
| CN116816385A (en) * | 2023-04-27 | 2023-09-29 | 中铁十一局集团有限公司 | Grouting method and related equipment for water-rich broken surrounding rock |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963150A (en) * | 2006-11-28 | 2007-05-16 | 李明远 | Reinforced-sealing pressure-stabilizing consolidation release-controlled superimposed stress weak rock coal supporting technology |
| CN101235720A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Excitated gap decompressed soft rock laneway support technology |
-
2013
- 2013-06-25 CN CN201310264896XA patent/CN103437770A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963150A (en) * | 2006-11-28 | 2007-05-16 | 李明远 | Reinforced-sealing pressure-stabilizing consolidation release-controlled superimposed stress weak rock coal supporting technology |
| CN101235720A (en) * | 2008-02-29 | 2008-08-06 | 李明远 | Excitated gap decompressed soft rock laneway support technology |
Non-Patent Citations (3)
| Title |
|---|
| 张普田: "开滦矿区深部矿井复杂条件下软岩巷道支护技术", 《第七次煤炭科学技术大会文集》, 1 April 2011 (2011-04-01) * |
| 张普田: "开滦矿区深部矿井软岩巷道支护技术研究", 《煤矿开采》, vol. 15, no. 4, 31 August 2010 (2010-08-31) * |
| 李书民 等: "常村煤矿易燃冲击厚煤层巷道支护技术", 《煤炭科技》, no. 3, 31 March 2012 (2012-03-31) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899330A (en) * | 2014-04-15 | 2014-07-02 | 中国矿业大学(北京) | Method for relieving pressure of high confining pressure roadway full fracture face quirk |
| CN104895580A (en) * | 2015-05-14 | 2015-09-09 | 张晓德 | Soft rock roadway surrounding rock self-support method and support stirring injection drilling machine |
| CN104895580B (en) * | 2015-05-14 | 2017-03-01 | 张晓德 | A kind of autologous method for protecting support of country rock of soft rock roadway and supporting are with stirring note rig |
| CN113374498A (en) * | 2021-07-20 | 2021-09-10 | 淮北市平远软岩支护工程技术有限公司 | High rock burst roadway support system based on underground soft rock replacement technology |
| CN113605927A (en) * | 2021-09-03 | 2021-11-05 | 淮北市平远软岩支护工程技术有限公司 | Support method for soft rock roadway surrounding rock under high rock burst stress |
| CN113605927B (en) * | 2021-09-03 | 2022-07-12 | 淮北市平远软岩支护工程技术有限公司 | Support method for soft rock roadway surrounding rock under high rock burst stress |
| CN116816385A (en) * | 2023-04-27 | 2023-09-29 | 中铁十一局集团有限公司 | Grouting method and related equipment for water-rich broken surrounding rock |
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Application publication date: 20131211 |