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Supporting process in soft rock mine roadway rush through construction tunneling

A coal roadway, fast technology, applied in the direction of temporary shields, pillars/brackets, mining equipment, etc., can solve problems such as failure, roadway deformation support, etc., and achieve the effect of long stabilization time and good stability

Active Publication Date: 2012-04-18
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of support failure caused by roadway deformation caused by uneven pressure in soft rock coal roadways, the present invention provides a support technology for soft rock coal roadway fast-passing structure excavation

Method used

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  • Supporting process in soft rock mine roadway rush through construction tunneling
  • Supporting process in soft rock mine roadway rush through construction tunneling
  • Supporting process in soft rock mine roadway rush through construction tunneling

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Embodiment Construction

[0017] The average thickness of the coal seam in Changping Mine of Shanxi Coal Group is 5.6m, the coal seam dip angle is 2-10°, the average is 6°, black, metallic luster, endogenous cracks are developed, bright coal is mainly contained, dark coal, semi-bright briquette, intercalated Gangue is mudstone, brittle, low-sulfur, high-quality anthracite coal with high calorific value. A fault was encountered during the tunneling of a fully-mechanized mining face, and the roadway was affected by the fault structure with high ore pressure, rapid pressure, and poor self-stability. After the roadway was excavated, the surrounding rock deformed rapidly, the self-stabilization time was short, and the mine pressure appeared violently. The roadway support was extremely difficult, and normal excavation could not be carried out.

[0018] In order to solve this problem, the support adopts the following technical means, such as figure 1 As shown, after the roadway is excavated, the metal mesh 1...

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Abstract

The invention relates to a mine roadway tunneling process, in particular to a supporting process in soft rock mine roadway rush through construction tunneling. The problem that the supporting is failed due to roadway deformation caused by nonuniform pressure of a soft rock mine roadway is solved. The supporting process in the soft rock mine roadway rush through construction tunneling comprises the following steps of: after the mine roadway is tunneled, hanging a metal net on a roadway wall, driving an anchor cable and an anchor rod into the roadway wall for supporting, arranging a plurality of retractable metal supports to support the roadway, and finally spraying concrete; therefore, the problem that the supporting is failed due to roadway deformation caused by the nonuniform pressure of the soft rock mine roadway can be effectively solved; and after supporting, the stabilization time is long, and stability is high.

Description

technical field [0001] The invention relates to a coal roadway excavation technology, in particular to a support technology for soft rock coal roadway rapid passage through structures. Background technique [0002] Soft rock roadway support is one of the key technical issues in mine construction and production, and has been highly valued by rock mechanics and mining engineering circles for many years. With the continuous increase of mining depth, the problem of roadway support is very prominent. The soft rock is unstable, the mine pressure is obvious, and there are often problems of large deformation in the excavation roadway, such as roof sinking, bottom sag, rheology of the two sides, etc., some reaching tens of centimeters or even several meters. When passing through the soft rock coal roadway structure, the mine pressure is large, the pressure is fast, the deformation of the surrounding rock is large, and the deformation speed is fast. The stability of the roof and the...

Claims

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Application Information

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IPC IPC(8): E21D19/00E21D21/00E21D15/16
Inventor 张智杰张育恒王家学王永革郭正兴
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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