High-stress large-deformation roadway supporting system and method

A roadway support and large deformation technology, which is applied in tunnels, earthwork drilling, tunnel lining, etc., can solve the problems of poor effect and easy failure, and achieve the goal of improving pull-out resistance, reducing anchor loss rate, and enhancing overall bearing capacity Effect

Pending Publication Date: 2022-06-28
YUNNAN PHOSPHATE CHEM GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high stress and large deformation roadway support system and method to solve the problem of poor effect and easy failure of traditional support methods on high stress and large deformation roadways

Method used

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  • High-stress large-deformation roadway supporting system and method
  • High-stress large-deformation roadway supporting system and method

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Embodiment

[0028] A high stress and large deformation roadway support method, comprising the following steps:

[0029] S1. Arrange the reinforced shell bracket 1 close to the inner wall of the roadway, install the anchor cable 2 on the reinforced shell bracket 1, and fix it on the inner wall of the roadway;

[0030] S2. Install the anchor cable 2 and the anchor rod 3 at intervals between the two sides and the arch of the soft rock roadway, and lay a metal mesh 4 on the ends of the anchor cable 2 and the anchor rod 3 for hanging and fixing;

[0031] S3. A retractable metal bracket 5 is installed on one side of the metal mesh 4, and the legs of the retractable metal bracket 5 are supported by double-row anchor piles;

[0032] S4. Concrete is poured through the grouting hole, so that the flexible concrete spray layer 6 is covered in the gap formed by the metal mesh 4, the shrinkable metal bracket 5, the steel shell bracket 1 and the inner wall of the roadway.

[0033] like figure 1 As sho...

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Abstract

The invention discloses a high-stress large-deformation roadway supporting system and method, and relates to the technical field of roadway supporting. The steel bar shell support is tightly attached to the inner wall of the roadway, and the anchor cable is installed on the steel bar shell support and fixed to the inner wall of the roadway; anchor cables and anchor rods are installed on the two sides and the arch portion of the soft rock roadway at intervals, and metal nets are laid on the anchor cables and the anchor rods for net hanging and fixing; a retractable metal bracket is mounted on one side of the metal net, and legs of the retractable metal bracket are supported by using double rows of anchor rod piles; concrete is poured through the grouting holes, so that the flexible concrete spraying layer covers gaps formed by the metal net, the retractable metal support, the steel bar shell support and the inner wall of the roadway. The supporting method and system can effectively improve the stability and the supporting strength of the surrounding rock of the high-stress large-deformation soft rock roadway, have the advantages of being safe, reliable, low in construction cost, easy to popularize in a large range and the like, and can greatly improve the stability of the soft rock roadway and achieve roadway supporting.

Description

technical field [0001] The invention relates to the technical field of roadway support, in particular to a high-stress and large-deformation roadway support system and method. Background technique [0002] In recent years, with the development of the coal industry and the increase of the excavation depth, the surrounding rock pressure of the roadway surrounding rock and support has also increased, and the large deformation of the roadway caused by high stress has aggravated the difficulty of supporting soft rock roadways. Soft rock roadway support has become a key and difficult problem that needs to be solved urgently in current mining and underground engineering. As the burial depth increases, the in-situ stress gradually increases, and when the roadway reaches a certain depth, the weight of the overlying rock layer will make the surrounding rock of the roadway at a high stress level. The lithology of soft rock is mostly Qinshui clay minerals that are prone to physical or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/15E21D20/00E21D11/10
CPCE21D11/18E21D11/152E21D20/00E21D11/10
Inventor 李树建潘超王孟来左宇军李雪峰庞建涛张斌周帆杨建光刘映辉
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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