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Method for preventing and treating large deformation and collapse of softrock tunnel

A large deformation, constant resistance and large deformation technology, applied in tunnels, shaft linings, tunnel linings, etc., can solve problems such as roadway collapse and support failure, achieve large deformation space, ensure stability, and be simple and easy to implement

Active Publication Date: 2010-12-08
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preventing large deformation and landslides in underground soft rock roadways that adapts to the characteristics of large deformation of soft rock roadways to ensure the stability of soft rock roadways, and to solve the problems existing in the prior art due to excessive deformation of surrounding rocks. The problem of support failure and large-area collapse of the roadway caused by the allowable deformation of the support material

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  • Method for preventing and treating large deformation and collapse of softrock tunnel
  • Method for preventing and treating large deformation and collapse of softrock tunnel
  • Method for preventing and treating large deformation and collapse of softrock tunnel

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Embodiment Construction

[0008] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0009] First of all, it should be noted that a number of specific parameters will be involved in the following preferred embodiments. As is well known to those skilled in the art, the multiple specific parameters involved are only for example to facilitate description of the preferred embodiment. According to The specific geological conditions of the underground soft rock roadway, the specific parameters involved in the following can have many changes to adapt to different geological conditions.

[0010] figure 1 A cross-sectional structure of a roadway in a preferred embodiment of the present invention is shown. When implementing this preferred embodiment, at first carry out excavation forming, that is, excavate or expand the roadway according to the straight wall semi-circular arch section of the designed roadway, and ensure that t...

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Abstract

The invention relates to a method for preventing and treating large deformation and collapse of a softrock tunnel, which comprises the following steps: tunneling molding or enlarging a tunnel; primarily spraying the first layer of concrete, and hanging a side net and a top net at the first layer of concrete; arranging a constant-resistance large deformation rock bolt; multiply spraying the second layer of concrete; arranging a constant-resistance large deformation anchor cable on the top plate; digging and laying the first layer of base plate concrete; hanging a layer of backing screen on the first layer of base plate concrete, and arranging a base angle anchor rod at the base angle; laying the second layer of base plate concrete onto the grade level; setting a long-term ground pressure monitoring point, if the tunnel deforms to a certain preset valve, carrying out secondary support at the key position of the tunnel and carrying out pressurization and slip casting on surrounding rock. The invention can well ensure the stability of softrock tunnel under the condition of large deformation, in addition, the invention has the advantages of simple and practicable implement and lower cost.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway construction, in particular to a method for preventing and controlling large-deformation landslides in underground soft rock roadways. Background technique [0002] The problem of coal mine soft rock roadway support is one of the major problems that plague coal mine construction and production safety. Soft rock roadways in coal mines have the characteristics of large deformation and easy collapse. In production practice, support failures and large-scale landslide accidents often occur due to excessive deformation of the surrounding rock of the roadway beyond the allowable deformation of the support material, resulting in huge casualties and property losses. In addition, the huge amount of repairs caused by improper support of soft rock roadways not only caused great economic losses, but also often caused the production of the entire mine to be in trouble or even shut down. Contents of...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D20/00E21D21/00E21D19/04
Inventor 何满潮冯吉利陈新
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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