Rock burst prevention device for high ground temperature tunnel

Abstract

The invention discloses a rock burst prevention device for a high ground temperature tunnel. The device comprises a telescopic liquid nitrogen fracturing pipe column, an orifice packer, a driving module, a pumping pressurizing injection module, a liquid nitrogen connecting pipeline, an integrated control module, a comprehensive monitoring and transmission system, a liquid nitrogen vehicle or a liquid nitrogen storage system, wherein the telescopic liquid nitrogen fracturing pipe column is sleeved with the orifice packer, and the rear face of the orifice packer is sequentially connected with the driving module, the high-pressure injection module, a connecting module and the liquid nitrogen car or the liquid nitrogen storage system. By adopting the device, the surrounding rock temperature ofthe high ground temperature tunnel can be effectively reduced and and high stress is released, so that the chain type thermal coupling rock burst disaster is eliminated. The device has the advantagesof being safe and effective, simple in operation, less in time consumption, high in efficiency, less in environmental pollution, rich in gas source and low in price, can obtain liquid nitrogen for fracturing from air on site, can save water resources and power resources, and can effectively protect the plateau ecological environment.

Description

Technical field [0001] The invention belongs to the technical field of high ground temperature and high ground stress tunnel excavation construction, underground space engineering thermal damage and rock burst disaster prevention technology, and in particular relates to a high ground temperature tunnel rock burst prevention device. Background technique [0002] During the excavation of deep-buried hard rock or high-stress tunnels such as water conservancy, hydropower, transportation, and mining, extreme or strong rock burst risks are often encountered. When the high strain energy accumulated in the rock body is suddenly released, the strong surrounding rock damage will cause great harm to the construction personnel and equipment on site. At present, there are two main ways to control rockburst at home and abroad: the first is to improve the stress state of the surrounding rock and reduce the stress and energy accumulated in the rock mass, such as stress relief blasting, spraying ...

AI Technical Summary

Problems solved by technology

According to research results and engineering application results at home and abroad, stress relief holes can reduce the risk of rockburst to a certain extent, but to prevent extremely strong rockburst or strong rockburst, it is necessary to drill a lot of stress relief holes, which is not only slow, but also sometimes Insufficient stress relief for thermally coupled rockburst prevention

The stress relief blasting method greatly disturbs the surrounding rock, increases the dust generated, and has a great impact on the construction period

The traditional high-pressure water injection or high-pressure water fracturing technology not only requires a large amount of water resources, but also adds many chemical substances to the fracturing fluid, which is very serious for environmental pollution.

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