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Deep-buried roadway rock burst danger relieving method

A roadway and roadway support technology, which is applied in the direction of tunnels, tunnel linings, underground chambers, etc., to achieve the effect of quickly relieving danger, reducing possibilities, and simplifying on-site operating procedures

Inactive Publication Date: 2021-08-06
ANHUI UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a deep-buried roadway rockburst relief method to solve the problems existing in the prior art when blasting pressure relief method is used to relieve deep-buried roadway rockburst

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] Such as figure 1 as shown, figure 1 It is a schematic diagram of the strong, weak and strong anti-scouring structure of the roadway section, and it is the ideal structure of the roadway anti-scouring that is prepared to be realized by the present invention. Three-layer strong and weak structure, the roadway support layer A is used to support the stability of the roadway, and its thickness is 1 to 2 times the height of the roadway; the weak energy-absorbing layer B is a soft and broken structure that scatters and absorbs shock waves, The thickness is 1 to 2 times the height of the roadway, and the hard original rock layer C is the undisturbed rock mass outside the weak energy-absorbing layer.

[0042] figure 2 It is a schematic diagram of the layout of blasting pressure relief holes in different sections of the roadway. In roadways with rockb...

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Abstract

The invention discloses a deep-buried roadway rock burst danger relieving method. The deep-buried roadway rock burst danger relieving method comprises the following steps that (1), a roadway supporting layer, a soft energy absorption layer and a hard rock original layer of a roadway wall rock mass are delineated; (2), a plurality of sections along the roadway are selected, and a plurality of blasting pressure relief holes are correspondingly drilled in each section; (3), a blasting and grouting integrated system composed of a PVC pipe, a blasting unit, clay bubble mud, a grouting hole and the like is correspondingly installed in each blasting pressure relief hole; (4), the blasting units are ignited to detonate, so that radial cracks and annular tangential cracks are formed in the soft energy absorption layer and the roadway supporting layer; and (5), after blasting, a high-pressure cement grouting machine is adopted to perform grouting reinforcement on the roadway supporting layer through the grouting holes of the PVC pipes. According to the deep-buried roadway rock burst danger relieving method, the problems existing when the deep-buried roadway rock burst is relieved through a blasting pressure relief method are solved.

Description

technical field [0001] The invention relates to the field of excavation methods for underground tunnels by stamping, in particular to a method for relieving dangers caused by rock burst in deep buried tunnels. Background technique [0002] Rockburst is a dynamic failure phenomenon in which brittle fractures like explosions occur in the rock mass during the construction and operation of deep underground projects because the strength of the surrounding rock cannot withstand excessive stress concentration. destruction, equipment damage and casualties. People cannot fully grasp the occurrence conditions of rock burst, resulting in unreasonable development layout and mining methods, no preventive measures or incomplete preventive measures, which inevitably form high stress concentration and risk of rock burst in local coal seam sections. Therefore, in the process of coal seam mining, these areas must be monitored and eliminated in time to ensure safe production. [0003] Existi...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/10
CPCE21D9/003E21D9/006E21D11/10
Inventor 吴荣新姜寒阳欧元超樊迎军朱建铭
Owner ANHUI UNIV OF SCI & TECH
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