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Fully-enclosed integral assembly grid concrete support method

A concrete and fully enclosed technology, which is applied in the direction of earthwork drilling, bolt installation, shaft equipment, etc., can solve problems that restrict the smooth production of mines, achieve rapid and effective support, uniform force, and avoid local stress concentration effects

Active Publication Date: 2013-12-11
CHINA UNIV OF MINING & TECH
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  • Application Information

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Problems solved by technology

Traditional roadway support technologies such as U-shaped shed support, material stone masonry support, ordinary reinforced concrete support, anchor-mesh cable-spray support, and anchor-grouting support can no longer meet the stability control of this type of large-section extremely soft rock roadway. requirements, seriously restricting the normal and smooth production of the mine

Method used

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  • Fully-enclosed integral assembly grid concrete support method
  • Fully-enclosed integral assembly grid concrete support method
  • Fully-enclosed integral assembly grid concrete support method

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Embodiment Construction

[0017] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0018] In the fully-enclosed integrally assembled grid concrete support method of the present invention, after the anchor net cable is sprayed once for support according to the conventional method of the prior art, fully enclosed integrally assembled grid supports are implemented at intervals in the roadway, and the concrete support method is poured. Concrete provides secondary permanent support for the roadway. The components used include angle steel 1, main reinforcement 2, connecting reinforcement 3, stirrup 4, reinforcing rib 5, bolt 6, grouting pipe 8, and the grouting pipe 8 is a steel pipe with internal thread. After the support is sprayed once with the anchor mesh cable, the number of grid components divided by each group of grid supports, the size of the main reinforcement 2, the stirrup 4 and the angle steel 1 of the grid are determined according ...

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Abstract

A fully-enclosed integral assembly grid concrete support method includes the steps: determining the number of grid components of each grid support and the sizes of main reinforcements, stirrups and angle steel of grids according to the designed shape and the size of a roadway needing support after bolt-mesh-anchor shotcreting primary support according to conventional technology; manufacturing a plurality of spliced grid components of three-dimensional support structures; and erecting the spliced grid components of the three-dimensional support structures in the roadway needing support along the direction of the roadway, fixing grouting pipes onto the main reinforcements of the grid components to erect a template and perform concreting, and performing full-face grout injection behind concrete walls of the grid supports by the aid of the grouting pipes to complete permanent support. By the aid of the method, the strength of a support body is greatly improved, and the support body is simple in structure and high in rigidity. The integrity of grid concrete and surrounding rocks is further improved, and a bearing structure jointly formed by the support body and the surrounding rocks is more uniformly stressed. The problem of difficulty in controlling stability of a difficultly supported roadway with extremely soft rocks and large sections is solved, and support cost is reduced.

Description

technical field [0001] The invention relates to a grid concrete support method, in particular to a fully enclosed integrally assembled grid concrete support method suitable for stability control of extremely soft rock, large section, and difficult-to-support roadways. Background technique [0002] At present, the stability control of large-section roadways in extremely weak semi-diagenetic and non-diagenetic strata has become a difficult problem in the production process of coal mines. In addition to being weak, the surrounding rock of this kind of roadway often has poor anchorability and injectability, high water content, and expansibility. Traditional roadway support technologies such as U-shaped shed support, masonry masonry support, ordinary reinforced concrete support, anchor-mesh cable-spray support, and anchor-grouting support can no longer meet the stability control of this type of large-section extremely soft rock roadway. The requirements of the mine have seriousl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D21/00
Inventor 靖洪文孟波陈坤福许国安杨圣奇
Owner CHINA UNIV OF MINING & TECH
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