CN101235721A - Reasonable replacement homogeneous wall rock soft rock laneway support construction technology - Google Patents
Reasonable replacement homogeneous wall rock soft rock laneway support construction technology Download PDFInfo
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- CN101235721A CN101235721A CNA2008100821671A CN200810082167A CN101235721A CN 101235721 A CN101235721 A CN 101235721A CN A2008100821671 A CNA2008100821671 A CN A2008100821671A CN 200810082167 A CN200810082167 A CN 200810082167A CN 101235721 A CN101235721 A CN 101235721A
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Abstract
The invention relates to the technical field of geological and mining, which particularly relates to a support technology for preventing coal mine tunnel from deforming and collapsing. The technique comprises adopting a bolt-grouting support, placing a grouting bolt in roadway surrounding rock, injecting cement grouting with pressure, arranging a cement spraying layer which utilizes a cable wire to be a bone to be a sealing layer, adopting a reasonable displacement technology before employing bolt-grouting support., when road section is excavated, displacing very soft rocks, rocks which are rick in cracks and rocks which are loosened under the function of external force with spraying concrete. The support technology replaces soft portions in surrounding rocks with spraying concrete, which is matched with a subsequent anchor bar and a slip casting technique, the invention constructs surrounding rock bodies to be homogeneous, assimilative and continuous support groups, compared with the prior art, the support technology has more stable support effect.
Description
Technical field: the present invention relates to ore deposit, ground technical field, especially a kind of support technology that prevents coal mine roadway distortion slump.
Background technology: along with the expansion of coal mining scope, mining depth constantly increases, mining conditions is more and more difficult, and the stack pressure that weak rock coal self expands and brings to roadway support under especially big buried depth, complicated structure and the mining induced stress 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, therefore be when not waiting, uneven stack pressure makes up.Roadway support can be suffered to destroy repeatedly under the effect of this uneven stack pressure, and conventional support technology is difficult to guarantee the stable of tunnel.The roadway support instability influences the safety in production during the mine construction, bring potential safety hazard also can for later normal use.
Along with the invention and the development of anchor spray technique, mid-term in last century, the U.S., Australia were with suspention beam, compound beam, the theoretical support system that proposes based on anchor pole of built-up arch.Big coal countries such as Russia, Poland, Turkey still adopt dissimilar metallic supports to handle the supporting problem in tunnel so far.At present, domestic on the basis of drawing foreign technology, to the roadway support under big buried depth, tectonic stress, mining pressure and " weak rocks, coal body " self swelling stress, mainly adopt two kinds of support patterns: a kind of is the composite support technology of whitewashing again behind totally-enclosed canopy of big model U shaped steel and the 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 the stable problem of present difficult roadway support well, the 2nd, and construction is complicated, roadway support cost height, repairs just more difficult after roadway support destroys again." weak rocks, coal body " support technology of latest domestic development is the method that adopts bolt grouting, utilize grouted anchor bar in weak rocks, coal body, to inject the slurries that have pressure, improve the intensity of coal and rock self, obtain effect preferably, but, still exist the supporting effect problem of unstable because the slurries pressure that injects in rock, the coal body is difficult to lasting stability.Publication number is that CN1963150A, application number are that 200610162650.1 patent application discloses a kind of Weak rock coal supporting technology of superimposed stress of slow release of pressure-stabilizing gluing of tough blinding course, this technology is inserted grouted anchor bar in roadway surrounding rock, the coal body, injection has the cement grout of pressure, is the cement spray-up of footpath bone with the wire rope in the tunnel surface arrangement.This method can be to big buried depth, be subjected to the tunnel under tectonic stress, mining pressure and " weak rocks, coal body " self the swelling stress influence 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: the present invention by the following technical solutions: reasonable replacement homogeneous wall rock soft rock laneway support construction technology, adopt bolt-grouting support, grouted anchor bar is inserted in the roadway surrounding rock, injection has the cement grout of pressure, the tunnel surface arrangement with the wire rope be the footpath bone the cement spray-up as seal, it is characterized in that, before implementing bolt-grouting support, adopt the reasonable replacement technology, when the excavation drift section, rock and loosening under external force rock that wherein dead-soft rock, crack are abundant are replaced with spraying concrete.
Heavily stressed complex structure district roadway surrounding rock is to compose the rock colony deposit under the natural endowment, have the heterogeneous body stratiform compose deposit, discontinuous body and stressed anisotropy.It is very big to roadway support pressure that these characteristics cause fragmentation, distortion, the rheology of rock mass under complex stress condition.The present invention takes the reasonable replacement technology, wherein dead-soft rock, abundant rock and the loosening under external force weaknesses such as rock in crack are partly replaced with spraying concrete, the anchor pole and the slurry injection technique that cooperate postorder are built into homogeneous that resistance to compression, tension and shear strength all greatly promoted, the same sex, continuous supporting colony to the country rock body.
Therefore, the more existing support technology supporting effect of the present invention is more stable.
Description of drawings: accompanying drawing is a roadway support section structure schematic diagram of the present invention.Wherein, 1 grouted anchor bar, 2 drift sections, 3 base angle foundation pits, 4 seals.
The specific embodiment: the invention will be further described below in conjunction with accompanying drawing.
Among the embodiment, the present invention also deep-cuts the base angle at excavation during the tunnel, and base angle foundation pit 3 is sprayed concrete is replaced.The base angle is in roadway junction, is area of stress concentration, originally is place the weakest in the roadway support here, the present invention deep-cuts the base angle, and then sprays the concrete filling, promptly with concrete displacement unstable soft rock herein, make it to become the strong basis plinth of supporting, further stablized supporting effect.The present invention inserts in the country rock with adopting multi-level grouted anchor bar 1 different depth among the embodiment, and every layer of grouted anchor bar 1 outer end hangs the wire rope that links mutually and spray concrete forms many spray-ups seal 4.The present invention adopts multi-level anchor pole 1 to be complementary with many spray-ups seal 4, and each spray-up 4 is combined with anchor pole 1 separately, forms multi-level anchor pole in rock mass.Anchor pole combined amount increase in density in the multi-level anchor pole unit of the making rock mass, make it abundant gluing through repeatedly injecting band mud jacking liquid, new assembly is based on anchor pole and cementitious matrix, can further overcome country rock tension and the low situation of shear strength, original heterogeneous body, discontinuous, anisotropic rock colony are built into homogeneous, the same sex and continuous high-strength novel rock mass, improve supporting effect.
Claims (3)
1, reasonable replacement homogeneous wall rock soft rock laneway support construction technology, adopt bolt-grouting support, grouted anchor bar (1) is inserted in the roadway surrounding rock, injection has the cement grout of pressure, the tunnel surface arrangement with the wire rope be the footpath bone the cement spray-up as seal (4), it is characterized in that, before implementing bolt-grouting support, adopt the reasonable replacement technology, when excavation drift section (2), rock and loosening under external force rock that wherein dead-soft rock, crack are abundant are replaced with spraying concrete.
2, reasonable replacement homogeneous wall rock soft rock laneway support construction technology according to claim 1 is characterized in that, deep-cuts the base angle at excavation during the tunnel, and base angle foundation pit (3) is sprayed concrete is replaced.
3, reasonable replacement homogeneous wall rock soft rock laneway support construction technology according to claim 1 and 2, it is characterized in that, insert in the country rock, every layer of grouted anchor bar (1) outer end hangs the wire rope that links mutually and sprays concrete forms many spray-ups seal (4) with adopting multi-level grouted anchor bar (1) different depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100821671A CN101235721A (en) | 2008-02-29 | 2008-02-29 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100821671A CN101235721A (en) | 2008-02-29 | 2008-02-29 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
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| Publication Number | Publication Date |
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| CN101235721A true CN101235721A (en) | 2008-08-06 |
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| CNA2008100821671A Pending CN101235721A (en) | 2008-02-29 | 2008-02-29 | Reasonable replacement homogeneous wall rock soft rock laneway support construction technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852083A (en) * | 2010-04-16 | 2010-10-06 | 中国科学院武汉岩土力学研究所 | Quick supporting method for large-deformation roadway easy to fall, break and loosen and apparatus thereof |
| CN101949294A (en) * | 2010-08-13 | 2011-01-19 | 山西潞安环保能源开发股份有限公司常村煤矿 | Prestressed full-length anchorage support method |
| CN108086998A (en) * | 2017-12-06 | 2018-05-29 | 广西大学 | A kind of construction method of the tunnel composite supporting construction based on coagulation handwoven cloth rapidly solidified material |
| CN108798704A (en) * | 2018-07-05 | 2018-11-13 | 西南交通大学 | A kind of rock stratum active support and change method suitable for underground engineering construction |
| CN112832834A (en) * | 2021-03-04 | 2021-05-25 | 淮北市平远软岩支护工程技术有限公司 | High-strength and high-toughness support sealing layer technology for preventing rock mass from ejecting and sealing layer equipment |
-
2008
- 2008-02-29 CN CNA2008100821671A patent/CN101235721A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852083A (en) * | 2010-04-16 | 2010-10-06 | 中国科学院武汉岩土力学研究所 | Quick supporting method for large-deformation roadway easy to fall, break and loosen and apparatus thereof |
| CN101949294A (en) * | 2010-08-13 | 2011-01-19 | 山西潞安环保能源开发股份有限公司常村煤矿 | Prestressed full-length anchorage support method |
| CN108086998A (en) * | 2017-12-06 | 2018-05-29 | 广西大学 | A kind of construction method of the tunnel composite supporting construction based on coagulation handwoven cloth rapidly solidified material |
| CN108798704A (en) * | 2018-07-05 | 2018-11-13 | 西南交通大学 | A kind of rock stratum active support and change method suitable for underground engineering construction |
| CN112832834A (en) * | 2021-03-04 | 2021-05-25 | 淮北市平远软岩支护工程技术有限公司 | High-strength and high-toughness support sealing layer technology for preventing rock mass from ejecting and sealing layer equipment |
| CN112832834B (en) * | 2021-03-04 | 2022-03-01 | 淮北市平远软岩支护工程技术有限公司 | High-strength and high-toughness support sealing method for preventing rock mass from ejecting |
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Open date: 20080806 |