CN101943013A - Dynamic/static combined support method for rock burst of roadway - Google Patents
Dynamic/static combined support method for rock burst of roadway Download PDFInfo
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- CN101943013A CN101943013A CN 201010277188 CN201010277188A CN101943013A CN 101943013 A CN101943013 A CN 101943013A CN 201010277188 CN201010277188 CN 201010277188 CN 201010277188 A CN201010277188 A CN 201010277188A CN 101943013 A CN101943013 A CN 101943013A
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Abstract
The invention discloses a dynamic/static combined support method for rock burst of a roadway. In the method, bent threaded anchor rods capable of providing high deformability and higher supporting capacity are arranged in rock burst-prone areas on the wall surface of the roadway, and common threaded anchor rods are installed in other areas on the wall surface, wherein the middle part of each bent threaded anchor rod is provided with a bent section and is not anchored, and other parts of a rod body are anchored into the rock body, and a bearing plate is arranged to form a certain prestress. The support structure formed by the method not only can bear the static high-stress load, but also can defend against the dynamic load in the rock burst process, thereby realizing the dynamic/static combined control on the rock burst of the roadway. The method has the advantages of simple and convenient operation, high pertinence and the like.
Description
Technical field
The present invention relates to the rock burst of a kind of tunnel and prevent and treat method, particularly relate to the sound combination supporting method of a kind of tunnel rock burst.
Background technology
The rock burst support technology is different with conventional supporting, and the supporting and protection structure under the rock burst condition not only will be able to take the effect of the heavily stressed load under the static conditions, the dynamic load effect in the time of also will resisting rock burst (or microseism).Be subjected to the research of rock burst mechanism mainly based on the influence of statics factor, existing rock burst support theory is also based on the statics support theory, and in practice, the rock burst supporting is exactly the conventional supporting that the support density supporting intensity increases sometimes.Rock burst sound combination supporting mode is being identical with traditional hard and soft support pattern aspect the supporting of tunnel surface, and difference is embodied in the design concept of ductility.Traditional hard and soft support pattern mainly is that the supporting that improves the surface, tunnel provides ductility, adds steel fibre etc. as using metallic support or sprayed mortar; Allow pressure in realizations extensions such as the inner mortar anchor cable that uses low bearing strength of rock mass, high-quality expand tube formula anchor pole, extending anchor poles, this can better use under large deformation soft rock condition, but it is, low etc. former thereby not too suitable because of not bearing curved scissors power or intensity for the rock burst hard rock that has than high-ground stress.Bearing heavily stressed rock mass simultaneously more is subject to the influence of disturbance and produces the phenomenon of rock burst, the problem that the section configuration region of stress concentration easily brings out rock burst has been ignored in the supporting of existing tunnel rock burst, thereby improves full face supporting intensity simply and cause support cost to increase.
Summary of the invention
Problem to be solved by this invention provides a kind of effect that can not only bear the heavily stressed load under the static state, the dynamic load effect in the time of can also resisting rock burst, and realization is to the sound combination supporting method of the tunnel rock burst of the sound combination control of tunnel rock burst.
In order to solve the problems of the technologies described above, the sound combination supporting method of tunnel provided by the invention rock burst, installing in the zone that rock burst easily takes place the tunnel wall can provide the large deformation ability and than the crooked threaded anchor rod of high bearing capacity, install the regular screw threads anchor pole in other zone of wall.
Described crooked threaded anchor rod middle part is provided with bending section and not anchoring, and other body of rod all is anchored in rock mass, and installs supporting plate and form certain prestressing force.
Adopt the sound combination supporting method of the tunnel rock burst of technique scheme, rock burst sound combination supporting mode is carried out ductile " moving " supporting than high bearing capacity at the drift section region of stress concentration, carries out routine " quiet " supporting in other zone in tunnel.
In sum, the present invention is a kind of effect that can not only bear the heavily stressed load under the static state, dynamic load effect in the time of can also resisting rock burst, realization is to the sound combination supporting method of the tunnel rock burst easy and simple to handle, with strong points of the sound combination control of tunnel rock burst.
Description of drawings
Fig. 1 is the no geological structure rock burst tunnel sound combination supporting schematic diagram of the embodiment of the invention 1;
Fig. 2 is the anchorage style schematic diagram of the embodiment of the invention 1 crooked anchor pole;
Fig. 3 be the embodiment of the invention 2 geological structure rock burst tunnel sound combination supporting schematic diagram arranged.
The specific embodiment
Below with reference to the drawings and specific embodiments the present invention is described in further details.
The sound combination supporting method of tunnel provided by the invention rock burst, installing in the zone that rock burst easily takes place the tunnel wall can provide the large deformation ability and than the crooked threaded anchor rod of high bearing capacity, install the regular screw threads anchor pole in other zone of wall, crooked threaded anchor rod middle part is provided with bending section and not anchoring, other body of rod all is anchored in rock mass, and installs supporting plate and form certain prestressing force.
Embodiment 1: referring to shown in Figure 1, adopt said method to carry out the sound combination supporting at no architectonic common semicircular arch (or basket handle arch) section rock burst tunnel, the position that the shear stress that this type of tunnel is shown by the geostatic stress effect is concentrated also is the recurrent position of rock burst mainly at vault, arch springing, group base angle.Tunnel design driving width and height are according to design parameters, roadway surrounding rock is hard rock, the support pattern of resin anchor+wire lath 4+ sprayed mortar 3 is adopted in the tunnel, rock-bolt length will be determined according to checking computations such as lithology and section configurations, the large deformation ability is installed and than the crooked threaded anchor rod 2 of high bearing capacity at vault, arch springing, group base angle, at all the other positions common bolt 1 is installed, generally should spray the 40-60mm concrete earlier after the tunnelling, and then beat anchor pole and linked network, the last secondary design thickness of whitewashing, linked network and whitewashing parameter are definite through checking.
Fig. 2 is the anchorage style of crooked threaded anchor rod 2, the end anchorage section 5 of crooked threaded anchor rod 2 is fixed on softened zone 9, the end tail anchoring section 7 of crooked threaded anchor rod 2 is fixed on elastic region 8, the stage casing of crooked threaded anchor rod 2 is a bending section 6, middle bending section 6 not anchorings, and install supporting plate and form certain prestressing force.Common bolt 1 is straight-bar anchor pole commonly used, adopts full length fastening or end anchorage.
Embodiment 2: referring to shown in Figure 3, adopt said method at there being architectonic semicircular arch (or basket handle arch) section rock burst tunnel to carry out the sound combination supporting, this type of recurrent position of tunnel rock burst is mainly at vault, arch springing, group base angle.Tunnel design driving width and height and rock-bolt length are according to design parameters, the support pattern of resin anchor+wire lath 4+ sprayed mortar 3 is adopted in the tunnel, the large deformation ability is installed and than the crooked threaded anchor rod 2 of high bearing capacity at vault, arch springing, group base angle, at all the other positions common bolt 1 is installed, this moment, the anchor pole direction should become than wide-angle with structural plane to arrange.The anchorage style such as the embodiment 1 of crooked threaded anchor rod 2 and common bolt 1.
The present invention is a kind of laneway support method of preventing and treating rock burst, and the supporting and protection structure of this method can not only be born the effect of the heavily stressed load under the static state, and the dynamic load effect in the time of can also resisting rock burst realizes the sound combination control to the tunnel rock burst.
Claims (2)
1. the sound combination supporting method of a tunnel rock burst is characterized in that: installing in the zone that rock burst easily takes place the tunnel wall can provide the large deformation ability and than the crooked threaded anchor rod of high bearing capacity, install the regular screw threads anchor pole in other zone of wall.
2. the sound combination supporting method of tunnel according to claim 1 rock burst is characterized in that: described crooked threaded anchor rod middle part is provided with bending section and not anchoring, and other body of rod all is anchored in rock mass, and installs supporting plate and form certain prestressing force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010277188 CN101943013A (en) | 2010-09-09 | 2010-09-09 | Dynamic/static combined support method for rock burst of roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010277188 CN101943013A (en) | 2010-09-09 | 2010-09-09 | Dynamic/static combined support method for rock burst of roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101943013A true CN101943013A (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010277188 Pending CN101943013A (en) | 2010-09-09 | 2010-09-09 | Dynamic/static combined support method for rock burst of roadway |
Country Status (1)
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| CN (1) | CN101943013A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392662A (en) * | 2011-10-28 | 2012-03-28 | 湖南科技大学 | Bent dynamic and static combined anchor rod |
| CN102518436A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for controlling tectonic rock burst in coal mine tunneling |
| CN106523003A (en) * | 2016-09-27 | 2017-03-22 | 北京科技大学 | Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway |
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| DE3504543C1 (en) * | 1985-02-11 | 1986-05-15 | Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum | Resin-bedded roof bolt |
| SU1642038A1 (en) * | 1989-02-28 | 1991-04-15 | Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела | Roof bolt |
| CN2092604U (en) * | 1991-05-24 | 1992-01-08 | 煤炭科学研究总院杭州环境保护研究所 | Controllable, steel stretching anchoring-bolts |
| CN101256065A (en) * | 2008-04-17 | 2008-09-03 | 中铁二局股份有限公司 | Safety rapid processing technique for strong zhiji rock burst |
| CN101270667A (en) * | 2008-04-30 | 2008-09-24 | 中国水电顾问集团华东勘测设计研究院 | Surrounding rock supporting method for ultra-strong or strong or medium rock burst tunnel section deep imbedded in underground chamber |
| CN101720379A (en) * | 2006-12-22 | 2010-06-02 | 动力岩石支护公司 | A deformable rock bolt |
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|---|---|---|---|---|
| DE3504543C1 (en) * | 1985-02-11 | 1986-05-15 | Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum | Resin-bedded roof bolt |
| SU1642038A1 (en) * | 1989-02-28 | 1991-04-15 | Всесоюзный научно-исследовательский институт горной геомеханики и маркшейдерского дела | Roof bolt |
| CN2092604U (en) * | 1991-05-24 | 1992-01-08 | 煤炭科学研究总院杭州环境保护研究所 | Controllable, steel stretching anchoring-bolts |
| CN101720379A (en) * | 2006-12-22 | 2010-06-02 | 动力岩石支护公司 | A deformable rock bolt |
| CN101256065A (en) * | 2008-04-17 | 2008-09-03 | 中铁二局股份有限公司 | Safety rapid processing technique for strong zhiji rock burst |
| CN101270667A (en) * | 2008-04-30 | 2008-09-24 | 中国水电顾问集团华东勘测设计研究院 | Surrounding rock supporting method for ultra-strong or strong or medium rock burst tunnel section deep imbedded in underground chamber |
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| 《世界隧道》 19961231 马积新 隧道和竖井中岩爆机理 , 第3期 * |
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| 《西部探矿工程》 20050731 冯建军 二郎山隧道岩爆特征与防治 , 第7期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392662A (en) * | 2011-10-28 | 2012-03-28 | 湖南科技大学 | Bent dynamic and static combined anchor rod |
| CN102518436A (en) * | 2011-11-14 | 2012-06-27 | 山东科技大学 | Method for controlling tectonic rock burst in coal mine tunneling |
| CN102518436B (en) * | 2011-11-14 | 2014-01-08 | 山东科技大学 | Method for controlling tectonic rock burst in coal mine tunneling |
| CN106523003A (en) * | 2016-09-27 | 2017-03-22 | 北京科技大学 | Rigid-flexible coupling energy absorbing support technology suitable for deep mining roadway |
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Application publication date: 20110112 |