Construction method for TBM construction tunnel to penetrate through strong rockburst section rock mass

By using the method of segmented excavation and crushing belt ring formation in TBM construction, the stress in the strong rock burst rock mass is released in advance, and the rock burst problem in the strong rock burst area during TBM construction is solved, which improves construction safety and progress, and reduces project costs.

CN119641359APending Publication Date: 2025-03-18CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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Patent Information

Application Number
CN202411860426.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

During the TBM construction process, strong rock bursts are a very challenging problem. The existing technology is difficult to effectively prevent the occurrence of rock bursts, resulting in damage to construction equipment, threats to life safety of personnel, delays in construction progress and high project costs.

Method used

The tunnel is excavated one by one by one by one by one by sectional excavation. During the excavation of each section of the tunnel, a broken belt circle is formed in the rock mass on the top of the tunnel, the arch shoulder and the outer part of the arch waist of the tunnel. The stress in the strong rock burst is released in advance through the crushing belt circle to reduce the chance of rock burst.

Benefits of technology

By releasing stress in strong rock bursts in advance, the chance of rock bursts occur during TBM construction is reduced, construction safety is improved, construction progress is ensured, and the impact of rock bursts on construction is significantly reduced.

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Abstract

The invention discloses a construction method for a TBM construction tunnel to penetrate through a strong rockburst section rock mass, and belongs to the technical field of tunnel engineering rockburst prevention construction processes. According to the construction method for the TBM construction tunnel to penetrate through the rock mass of the strong rockburst section, the construction rockburst strength of the strong rockburst section can be effectively reduced, and the construction safety is improved. According to the construction method, a tunnel penetrating through a strong rockburst section rock mass is formed by excavating section by section in a sectional tunneling mode, and in the construction process of each section of tunnel, a tunnel face formed in the excavation process of a previous section of tunnel is used as a foundation; a circle of broken zone ring layer is at least formed in the rock mass on the periphery of the arch crown, the arch shoulder and the arch waist part of the next section of tunnel through the tunnel face, and the stress in the strong rockburst rock mass of the section is released in advance through the broken zone ring layer; and the rock burst high-risk area of the section of the strong rock burst rock mass is transferred to the rock mass away from the tunnel to reduce the probability of rock burst in TBM construction, and then the section of TBM construction penetrating through the strong rock burst rock mass tunnel is conducted.
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