Underground engineering rock burst geological disaster passive prevention and treatment equipment and using method thereof

Abstract

The invention provides underground engineering rock burst geological disaster passive prevention and treatment equipment and a using method thereof, and relates to the technical field of underground engineering protection. The equipment comprises a passive protection mechanism, a telescopic device, a supporting structure and a walking mechanism which are arranged on the surface of a surrounding rock in sequence from outside to inside. The passive protection mechanism comprises a positioning column arranged in the radial direction and an energy dissipating net fixed at the outer end of the positioning column. The telescopic device consists of at least two telescopic units arranged in the circumferential direction of the telescopic device. Each telescopic unit comprises a shell body, an air sac installed in the shell body and a fixed pile. The inner end of the fixed pile is fixed at the bottom of the shell body, and the outer end of the fixed pile stretches out of the shell body and is sleeved with the inner end of the positioning column. The air sac is located between the inner wall of the shell body and the outer wall of the fixed pile. According to the equipment, because the energy absorption intensity of an underground engineering supporting and protection system is not enough, a safety accident caused by instantaneous releasing of accumulative energy in a rock when high-intensity rock burst happens is solved effectively, the rock burst harm is reduced to the uttermost extent, and the engineering risk is reduced.

Description

technical field [0001] The invention relates to the technical field of underground engineering protection, in particular to a passive prevention and control equipment for underground engineering rockburst geological disasters and a use method thereof. Background technique [0002] When tunnels and other underground projects are built in a rock mass environment with large burial depth, high strength, and strong tectonic movement, different forms of rockbursts often occur. Safety and mechanical equipment bring great challenges and seriously affect the construction progress, which is one of the worldwide underground engineering problems. [0003] At present, the control methods for rockburst are mainly divided into two types: active and passive. Release holes, flexible fine steel wire mesh, radial anchors, shotcrete, waterproof boards, and molded secondary lining walls form a multi-layer support structure. On the middle palm face, side wall stress release holes are set on the...

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Problems solved by technology

Chinese invention patent 201611099816X discloses a tunnel rockburst prevention support method based on the concept of active support. The first concrete layer is sprayed on the wall of the tunnel to be supported and a borehole is opened, and an expansion shell prestressed anchor is installed in the borehole. , and control the expansion-shell prestressed anchor so that it exerts radial force on the tunnel wall for active support. The steel mesh is set on the first concrete layer, and the second concrete layer is set on the surface of the steel mesh, so that The second concrete layer covers the steel mesh on the first concrete layer. The methods described in the above two patents are active supports, but practice shows that the control effect is not satisfactory, and the cost is high and the construction period is long.

[0004] Chinese invention patent 2016104623937 discloses a surrounding rock reinforcement system for reducing rockburst hazards, which belongs to passive support type support. Before the initial setting, paste the basalt fiber cloth with high tensile strength along the concrete surface quickly, and then install the anchor rod, which passes through the basalt fiber cloth and concrete leveling layer and implants into the rock mass, so that the surrounding rock, shotcrete, basalt fiber Cloth and bolt groups form a surrounding rock reinforcement system, which can significantly increase the tensile strength of the surface of the surrounding rock, thereby effectively preventing the surface of the surrounding rock from being split and slabs bent under tension, thereby inhibiting the occurrence of rockbursts. However, due to the energy absorption of this measure Insufficient strength, resulting in poor practice results

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