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A Tunnel Primary Support Construction Method Adaptable to High Ground Stress and Rockburst

A high ground stress and initial support technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problem of rockburst damage to initial support, large deformation cannot be accurately estimated, and reserved deformation cannot meet requirements, etc. problems, to achieve the effect of ensuring safety

Active Publication Date: 2021-11-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the inability to accurately predict the occurrence of large deformation and rockburst, the reserved deformation cannot meet the requirements, resulting in the deformation of the initial support and the rockburst damage to the initial support and injury to the construction personnel.

Method used

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  • A Tunnel Primary Support Construction Method Adaptable to High Ground Stress and Rockburst
  • A Tunnel Primary Support Construction Method Adaptable to High Ground Stress and Rockburst
  • A Tunnel Primary Support Construction Method Adaptable to High Ground Stress and Rockburst

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Embodiment

[0044] Such as figure 1 , 2 , 3, 4, and 6, the present invention provides a tunnel initial support construction method that can adapt to high ground stress and rockburst, mainly comprising the following steps:

[0045] (1) Since high ground stress and rockburst are always accompanied by large deformation and encroachment of surrounding rock and primary support, when determining the design scheme, the constructed primary support fully takes into Leave room for deformation;

[0046] (2) In order to release the surrounding rock deformation caused by high ground stress and rockburst, the reserved space is filled with omega-shaped thin steel plates. The form of omega-shaped thin steel plates is as follows Figure 5 As shown; when the stress release of the surrounding rock causes large deformation, the omega-shaped thin steel plate can adapt to the large deformation of the surrounding rock through its own compression deformation and ensure the stability of the steel arch; when the...

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Abstract

The invention relates to a tunnel primary support construction method adaptable to high ground stress and rockburst. The method comprises: (1) reserving a deformation space between the shaped steel arch frame and surrounding rock; (2) ensuring the stability of the shaped steel arch frame The thin steel plate layer is filled in the reserved space; (3) the loose surrounding rock circle around the tunnel is reinforced with full-length bonded anchor rods; (4) the The end-anchor long bolt / cable with anchor section and free section suspends the steel arch, so that the anchor section of the end-anchor long anchor / cable is fully anchored into the stable surrounding rock area to withstand the stress release of the surrounding rock , Energy release during the rockburst process and fully absorb the deformation energy of the thin steel plate layer. Compared with the prior art, the present invention has the advantages of being suitable for deep-buried tunnels, applicable to rockbursts and high ground stresses in tunnel deep shafts, deep underground spaces, etc., high stability, and avoiding disturbances.

Description

technical field [0001] The invention relates to the technical field of tunnel initial support, in particular to a tunnel initial support construction method adaptable to high ground stress and rockburst, which can be applied to conditions such as tunnel deep shafts and deep underground spaces where rockburst and high ground stress exist. Background technique [0002] The high ground stress environment of deep-buried tunnels has brought many difficulties to the construction of tunnel engineering, especially the large deformation of surrounding rock and supporting structures caused by high ground stress and the rockburst of brittle surrounding rock, which not only increase the difficulty of tunnel construction, but also make the construction process difficult. The safety of construction personnel is seriously threatened in the middle, and tunnel diseases caused by high ground stress and rockburst during operation are not uncommon. Existing methods include: [0003] (1) The fle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D11/20E21D21/00
CPCE21D11/18E21D11/20E21D21/00
Inventor 谢东武丁文其张清照乔亚飞
Owner TONGJI UNIV