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Rock burst roadway energy absorption and release comprehensive anti-impact supporting method

A rock burst and roadway technology, which is applied in tunnels, earthwork drilling, tunnel lining, etc., can solve problems such as ignoring the large deformation of rock burst roadways, achieve good instantaneous deformation ability, ensure integrity, and be easy to implement

Active Publication Date: 2020-11-10
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the three-stage combined support of this method has a significant control effect on the strong rock burst roadway, but it ignores the characteristics of large deformation of the rock burst roadway. play an important role in reducing support costs

Method used

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  • Rock burst roadway energy absorption and release comprehensive anti-impact supporting method
  • Rock burst roadway energy absorption and release comprehensive anti-impact supporting method
  • Rock burst roadway energy absorption and release comprehensive anti-impact supporting method

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation.

[0037] Such as Figure 1-4 As shown, a coal mine roadway anchor net cable shed combined support method, including the following steps:

[0038] Step 1) Determine the roadway impact area and grade according to the rock burst risk assessment report and on-site drilling cuttings method. After the roadway is excavated, bolt holes are drilled on the roof and side of the roadway, and the high prestressed pressure anchor rod 2 is installed. The length of the high prestressed pressure anchor rod 2 is not less than 2400mm, and the effective pressure distance is not less than 80mm; roadway Hang the metal mesh 1 on the roof and side, and then install the anchor tray, apply the pre-tightening force of the anchor, the pre-tightening force is not less than 60kN, and quickly complete the foundation anchor net support of the roadway roof and side.

[00...

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Abstract

The invention relates to a rock burst roadway energy absorption and release comprehensive anti-impact supporting method. Foundation anchor net supporting of a roadway top plate and side parts is rapidly completed; according to different roadway rock burst danger levels, anchor cable holes are drilled in the top plate and the two side parts according to different row spacings, and it is ensured that the anchor cable holes and anchor rod holes are not located in one same roadway section; square shallow holes are constructed in two bottom corners of a roadway, the row spacing of the square shallow holes in the bottom corners of the roadway is the same as that of the anchor cable holes, and the square shallow holes and the anchor cable holes are located on the same section; an energy absorbingand releasing anti-impact bracket is mounted and fixed by taking the square shallow holes in the bottom corners of the roadway as base points, an anchor cable is mounted in the anchor cable holes bypenetrating through round holes reserved in the anti-impact bracket, an anchor cable tray and a lock are mounted, anchor cable pre-tightening force is applied, the energy absorbing and releasing anti-impact bracket is fixed, and the energy absorbing and releasing anti-impact bracket is clung to roadway surrounding rock; and along with roadway tunneling, the steps are circularly completed, and supporting of the rock burst roadway is completed.

Description

technical field [0001] The invention relates to a coal mine roadway anchor net cable shed combined support method, in particular to a rock burst roadway energy absorption and energy release comprehensive anti-scour support method, which belongs to the field of coal mine roadway support. Background technique [0002] With the increase of my country's coal mining intensity, shallow coal resources have been gradually exhausted, and the mining of deep coal resources has become an important way and an inevitable trend to meet my country's energy needs. However, with the increase of coal mining depth and mining intensity, the frequency, intensity and damage degree of rock burst disasters are on the rise. Rock burst has become a major safety problem faced by deep coal mining in my country. Statistical law shows that the vast majority of rock burst disasters occur in the roadway area, often causing serious damage to the roadway and heavy casualties, seriously affecting mine producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/00E21D21/00E21D20/00E21D11/18F16F15/067
CPCE21D15/00E21D21/00E21D20/00E21D11/18F16F15/067Y02A30/30
Inventor 蒋邦友纪洪广陈长鹏丁希阳公为梅孟伟峰韩传磊顾士坦郑利森
Owner SHANDONG UNIV OF SCI & TECH
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