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Method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation damping characteristics

A technology of surrounding rock support and impact ground pressure, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of inability to meet technical requirements, large support resistance during support time, and inapplicability, and the method is simple and easy to achieve. operation, reduce safety accidents, and improve the effect of safety

Inactive Publication Date: 2013-04-24
LIAONING TECHNICAL UNIVERSITY
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  • Description
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Problems solved by technology

However, for the impact rock mining roadway with short support time, large support resistance, and high-speed and strong impact load, the energy-absorbing support device with this structure cannot meet the technical requirements and is not applicable.

Method used

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  • Method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation damping characteristics
  • Method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation damping characteristics
  • Method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation damping characteristics

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with drawings and embodiments.

[0027] to combine figure 1 , figure 2 and image 3 According to the present invention, the method for preventing and controlling rock burst by artificially regulating the energy-dissipating and shock-absorbing characteristics of the surrounding rock support of the roadway is operated according to the following steps:

[0028] Step 1: After the mining roadway in the working face is formed, first use the high-strength metal support 1 whose natural frequency is far away from the vibration frequency of rock burst to support the surface of the roadway (the natural frequency of the metal support can be measured through experiments on the ground), A high-strength shock-absorbing material composed of fiber-reinforced foam concrete prefabricated blocks is filled between the support 1 and the surrounding rock support of the roadway to form a shock-absorbing layer 2;

[0029] ...

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Abstract

The invention discloses a method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation characteristics. When a mining tunnel is formed, high-strength metal supports with inherent frequency away from rock burst vibration frequency are used for supporting the surface of the tunnel, a buffer damping layer is filled between the metal supports and a tunnel surrounding rock support, an energy dissipation damping layer is formed by the technology of deep hole drilling and deep hole deep section gap millisecond explosion, and a vibration detecting sensor and a monitoring analyzer are used for detecting energy dissipation damping effects of a surrounding rock composite layer. Process parameters such as metal support radius and mutual distance of the metal supports, and thickness of the buffer damping layer and the energy dissipation damping layer are regulated optimally and manually to achieve optimal energy dissipation damping effects and prevent rock burst, and accordingly coal mine production safety accidents caused by rock burst and mine vibration can be avoided effectively.

Description

technical field [0001] The invention relates to coal mining roadway support, in particular to a method for preventing and controlling rock burst by manually adjusting the energy dissipation and shock absorption characteristics of roadway surrounding rock support, and is especially suitable for mining area roadways in deep rock burst coal mines. Background technique [0002] With the increase of my country's energy demand and the continuous increase of mining intensity, most mines will enter the deep mining stage in the next few years. Under deep conditions, the frequency and intensity of rock burst will increase, which will easily cause roadway support damage, collapse and casualty accidents, seriously affecting the safe production of coal mines. Therefore, the prevention and control of rock burst in mining roadways in deep working faces has become an urgent issue to be solved for safe and efficient mining of deep coal in my country. [0003] At present, the prevention and ...

Claims

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Application Information

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IPC IPC(8): E21D11/00
Inventor 潘一山聂颖李国臻李忠华徐连满尹万蕾李祁贾宝新崔乃鑫
Owner LIAONING TECHNICAL UNIVERSITY
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