CN105156139A - Method for three-dimensional support by using long, medium, and short anchor rods - Google Patents
Method for three-dimensional support by using long, medium, and short anchor rods Download PDFInfo
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- CN105156139A CN105156139A CN201510318253.8A CN201510318253A CN105156139A CN 105156139 A CN105156139 A CN 105156139A CN 201510318253 A CN201510318253 A CN 201510318253A CN 105156139 A CN105156139 A CN 105156139A
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- anchor pole
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Abstract
The invention relates to a method for three-dimensional support by using long, medium, and short anchor rods. The method comprises first support and second support. The second support comprises: (1) applying short anchor rods to control surface surrounding rocks, to form a stable bearing arch to anchor and support; (2) applying medium-length anchor rods, to anchor the bearing arch formed by the short anchor rods on a relatively stable rock stratum, and forming a new thickened bearing arch at the same time, so the bearing arch becomes stable; (3) applying long anchor rods to further anchor the above bearing arches on a stable rock stratum. The method is advantaged in that characteristics of soft rocks determine that support of the soft rocks must be rapid and timely, and surrounding rocks are effectively sealed, to put an end to a channel which may continue weathering and peeling, strength of the surrounding rocks are maintained to the largest extent, so after roadway driving, rapid support with certain strength must be performed, and the surrounding rocks are sealed in time, to put an end to a channel which absorbs water and expands, thereby achieving an objective of roadway support.
Description
Technical field
Type of the present invention relates to a kind of method utilizing the three-dimensional supporting of long, medium and short anchor pole.
Background technology
Mine of Longkou Mining Area is the typical Tertiary Period " soft rock " mining area, and field with "nine squares" coal measure strata forms primarily of mud stone, Oil Shale, argillaceous rocks, charcoal mudrock, oil shale, coal and sandstone.Coal seam and roof and floor on a large scale in be the very poor yolk coal rock stratum of stability, the inner layer of its surrounding rock structure and outer layer all belong to unstable type, thus roadway maintenance is very difficult, and to mining influence and adopt that dark to increase reflection responsive, and has and more repair worse feature.And due to coal bed joints anormogenesis in district, there is very high degree of porosity and good gas permeability, the unidirectional compressive strength of the contiguous roof strata in coal seam is mostly 5.3 ~ 20MPa, angle of internal friction is 26.3 ~ 32 °, sillar saturated water absorption is close to 100%, be up to 291.77%, moisture content very easily enters inside, rock stratum, so the easy deliquescence weathering in tunnel, reduce very soon once be exposed to intensity in air, country rock surface moisture absorption deliquescing before this, the continuity along with the time develops into stream and becomes, and expands to the deep of country rock gradually.While water suction is softening, volume expands gradually to scope of freedom motion, and as closed not in time, this distortion is undertaken continuing.Visible, Liang Jia field with "nine squares" country rock belongs to typical soft rock strata.
Because the engineering stability of soft-rock tunnel is poor, short and have pressure manifestation characteristic from the steady phase, tunnel one is excavated, roof mudstone sandstone alternating layers are namely because delamination develops in depth and weathering and going to pot, for avoiding back inbreak, excavate in tunnel in 0.5 ~ 1.5h and must carry out bolt support to top board immediately, and because country rock has the rear strong dilatancy of water suction, slaking, the feature of rheological characteristic, therefore must carry out whitewashing in 7 ~ 8h to close, do not give country rock discharge space and the time fully of excavation, although therefore this emergent remedial supporting encloses side top in time, the expansion that effectively prevent loose crushing band is dark, but also exactly cause the reason of later stage stress integrated distribution again, strengthen the difficulty of supporting.
Summary of the invention
For overcoming the defect of prior art, the invention provides a kind of Deep Soft Rock Tunnel without stable rock stratum cable bolting method, technical scheme of the present invention is: a kind of method utilizing the three-dimensional supporting of long, medium and short anchor pole, comprising:
(1) once supporting: be Bolt net and jet, tunneling boring bolt interval=800 × 800mm, sprays thick 100 ~ 120mm;
(2) secondary supporting: be the three-dimensional supporting of anchor beam and reinforcement anchor pole, anchor beam spacing 1000mm, reinforcement bolt interval=800 × 800mm; Described reinforcement anchor pole comprises Short bolt, middle long anchor pole and long anchor pole; Injection Short bolt controls top layer country rock, and formation is stablized bearing-load arch and carried out anchoring support;
In injection, the bearing-load arch that Short bolt is formed is anchored in relatively stable rock stratum by long anchor pole, forms the bearing-load arch of new thickening simultaneously, makes it more to tend towards stability; The bearing-load arch of aforementioned formation is anchored in stable rock stratum by injection long anchor pole further.
The twisted steel anchor rod of described Short bolt to be length be 2250mm; The twisted steel anchor rod of long anchor pole to be length be 2500 ~ 3000mm in described; The twisted steel anchor rod of described long anchor pole to be length be 3500 ~ 4000mm.
The advantage of type of the present invention is: the characteristic of soft rock determines soft rock supporting must in time, rapidly, and accomplish country rock effectively closed, stop the channel continuing weathering off, keep country rock self-strength to greatest extent, therefore must carry out rapidly and have the supporting of some strength behind pick lane, close country rock in time, stop the channel of imbibition, reach the object of roadway support.
Detailed description of the invention
Further describe the present invention below in conjunction with specific embodiment, advantage and disadvantage of the present invention will be more clear along with description.But these embodiments are only exemplary, do not form any restriction to the scope of type of the present invention.It will be understood by those skilled in the art that and can the details of type technical scheme of the present invention and form be modified or be replaced under the spirit and scope not departing from type of the present invention, but these amendments and replacing all fall in the protection domain of type of the present invention.
The present invention relates to a kind of method utilizing the three-dimensional supporting of long, medium and short anchor pole, comprising:
(1) once supporting: be Bolt net and jet, tunneling boring bolt interval=800 × 800mm, sprays thick 100 ~ 120mm;
(2) secondary supporting: be the three-dimensional supporting of anchor beam and reinforcement anchor pole, anchor beam spacing 1000mm, reinforcement bolt interval=800 × 800mm; Described reinforcement anchor pole comprises Short bolt, middle long anchor pole and long anchor pole; Injection Short bolt controls top layer country rock, and formation is stablized bearing-load arch and carried out anchoring support;
In injection, the bearing-load arch that Short bolt is formed is anchored in relatively stable rock stratum by long anchor pole, forms the bearing-load arch of new thickening simultaneously, makes it more to tend towards stability; The bearing-load arch of aforementioned formation is anchored in stable rock stratum by injection long anchor pole further.
The twisted steel anchor rod of described Short bolt to be length be 2250mm; The twisted steel anchor rod of long anchor pole to be length be 2500 ~ 3000mm in described; The twisted steel anchor rod of described long anchor pole to be length be 3500 ~ 4000mm.
Adopt this technique to prevent two to help to squeeze in sprinkler body delamination, destroy, reduce tunnel repair for 2nd time rate.
Claims (2)
1. utilize a method for the three-dimensional supporting of long, medium and short anchor pole, it is characterized in that, comprising:
(1) once supporting: be Bolt net and jet, tunneling boring bolt interval=800 × 800mm, sprays thick 100 ~ 120mm;
(2) secondary supporting: be the three-dimensional supporting of anchor beam and reinforcement anchor pole, anchor beam spacing 1000mm, reinforcement bolt interval=800 × 800mm; Described reinforcement anchor pole comprises Short bolt, middle long anchor pole and long anchor pole; Injection Short bolt controls top layer country rock, and formation is stablized bearing-load arch and carried out anchoring support;
In injection, the bearing-load arch that Short bolt is formed is anchored in relatively stable rock stratum by long anchor pole, forms the bearing-load arch of new thickening simultaneously, makes it more to tend towards stability; The bearing-load arch of aforementioned formation is anchored in stable rock stratum by injection long anchor pole further.
2. the three-dimensional supporting method of length anchor pole according to claim 1, is characterized in that, the twisted steel anchor rod of described Short bolt to be length be 2250mm; The twisted steel anchor rod of long anchor pole to be length be 2500 ~ 3000mm in described; The twisted steel anchor rod of described long anchor pole to be length be 3500 ~ 4000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318253.8A CN105156139A (en) | 2014-12-31 | 2015-06-11 | Method for three-dimensional support by using long, medium, and short anchor rods |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014108473056 | 2014-12-31 | ||
| CN201410847305 | 2014-12-31 | ||
| CN201510318253.8A CN105156139A (en) | 2014-12-31 | 2015-06-11 | Method for three-dimensional support by using long, medium, and short anchor rods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105156139A true CN105156139A (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510318253.8A Pending CN105156139A (en) | 2014-12-31 | 2015-06-11 | Method for three-dimensional support by using long, medium, and short anchor rods |
Country Status (1)
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| CN (1) | CN105156139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374680A (en) * | 2018-03-12 | 2018-08-07 | 中国矿业大学 | A kind of single hole is double to anchor assembled bolt and application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571049A (en) * | 2009-04-19 | 2009-11-04 | 张京泉 | Anchor net spray secondary supporting method under the condition of coal mine roadway construction |
| CN102226407A (en) * | 2011-05-23 | 2011-10-26 | 中铁二院工程集团有限责任公司 | Four-line large-span tunnel cable-arch combined primary support structure |
| CN102661158A (en) * | 2012-05-28 | 2012-09-12 | 山西汾西矿业（集团）有限责任公司 | Coal-rock composite roof difference scale anchor rod combined supporting method |
| CN103147778A (en) * | 2013-03-23 | 2013-06-12 | 孟志强 | Method for lane development and support in extremely crushed rock stratum |
-
2015
- 2015-06-11 CN CN201510318253.8A patent/CN105156139A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571049A (en) * | 2009-04-19 | 2009-11-04 | 张京泉 | Anchor net spray secondary supporting method under the condition of coal mine roadway construction |
| CN102226407A (en) * | 2011-05-23 | 2011-10-26 | 中铁二院工程集团有限责任公司 | Four-line large-span tunnel cable-arch combined primary support structure |
| CN102661158A (en) * | 2012-05-28 | 2012-09-12 | 山西汾西矿业（集团）有限责任公司 | Coal-rock composite roof difference scale anchor rod combined supporting method |
| CN103147778A (en) * | 2013-03-23 | 2013-06-12 | 孟志强 | Method for lane development and support in extremely crushed rock stratum |
Non-Patent Citations (3)
| Title |
|---|
| 李茂臣: "复杂地质条件下地巷道支护技术研究", 《山东煤炭科技》 * |
| 潘贵豪等: "高应力软岩巷道支护新理论及应用研究", 《湖南科技大学学报（自然科学版）》 * |
| 王平等: "深部软岩巷道等应力承载拱强度理论研究", 《矿业工程研究》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374680A (en) * | 2018-03-12 | 2018-08-07 | 中国矿业大学 | A kind of single hole is double to anchor assembled bolt and application method |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151216 |