Separation roadway rock burst prevention and control method

A technology of rock burst and separation, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problem of difficult monitoring of separation layer stope roadway roof stress distribution, energy release range, and difficult quantitative early warning of separation layer stope Impact hazard and other issues

Inactive Publication Date: 2021-03-12
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods and conventional monitoring techniques are difficult to quantitatively warn the impact risk of the stope in the separation layer, and it is difficult to monitor the stress distribution and energy release range caused by the roof of the roadway in the separation layer stope

Method used

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  • Separation roadway rock burst prevention and control method
  • Separation roadway rock burst prevention and control method
  • Separation roadway rock burst prevention and control method

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] An embodiment of the present invention provides a method for preventing and controlling rock burst in a layer-separated roadway, which includes the following steps:

[0017] 1. According to the geological mining conditions of the stope on the abscisive layer roof, the evaluation report on the risk of rock burst, etc., combined with the specific mine pressure observation abscission data, determine the impact risk area, A is the dangerous area, see figure 1 ;

[0018] 2. Carry out anchor cable grouting construction in the separation layer area, and compact the separation layer space, 1 is the grouting area, and 2 is the grouting dense area, see figure 2 .

[0019] 3. After grouting, set up brackets to compact the space in the separation layer area, maintain the continuous transmission of support force, and avoid separation again. 3 is the support support area. The purpose of preventing and controlling rock burst is achieved through strong support. See image 3 .

[00...

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Abstract

The invention discloses a separation roadway rock burst prevention and control method. The method comprises the following steps that S1, a dangerous area is determined, specifically, the result is evaluated according to specific conditions of a coal seam roof, a support form, rock burst influence factors and a rock burst risk, separation data is monitored in combination with specific mine pressure, and the dangerous area is determined; S2, anchor cable grouting reinforcement is conducted, specifically, for a stope of the separation roof, roof anchor cable grouting construction is conducted inthe dangerous area, anchor cables are fixed in a rock stratum without separation, and a high-concentration slurry grouting process is adopted; and S3, a support with high initial supporting force is erected, specifically, after grouting, the separation zone is dense, the support with high initial supporting force is erected, part of space in the separation zone is compacted, and the roof is strongly supported.

Description

technical field [0001] The invention belongs to the technical field of coal mining, in particular to a method for preventing and controlling rock burst in a layer-separated roadway. Background technique [0002] Roof and rockburst accidents caused by deep coal seam mining are major disasters. With the increase of mining depth, the complexity of geological conditions, and the lack of roadway support resistance, the phenomenon of roadway roof separation often occurs during the mining process, resulting in support Ineffective, local or large-scale roof fall accidents occur, which not only affect production, but also cause serious safety hazards. With the increase of mining depth, the concealment of deep geology is enhanced, and the support is not in place. If the coal seam still has the risk of impact, it will cause the impact dynamic pressure disaster of roof separation layer fragmentation. Large-area rapid caving is a complex disaster, and the hazard prediction and destructi...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E21D20/02E21D11/00
CPCE21D20/02E21D11/00
Inventor潘立友周脉来毕强陈理强
OwnerSHANDONG UNIV OF SCI & TECH