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Numerical Simulation to Research on the Fracture Mechanism of the Surrounding Rock in Deep Tunnels

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Abstract

In order to further explored the mechanical mechanism of surrounding rock zonal disintegration in deep buried tunnels, Numerical simulation was used in this paper to analyze the variation of different rock mass mechanical parameters (c, φ, µ) of surrounding rock and variation of the zonal disintegration under horizontal tectonic stress. Through the research and analysis, the influence law of rock mass mechanical parameters (c, φ, µ) on the zonal disintegration of surrounding rock of deep buried tunnel was obtained. The increase of the cohesive force and internal friction angle of the rock mass can reduce the range of partition failure. However, the influence of Poisson’s ratio on the zonal disintegration range presents nonlinear characteristics. At the same time, the horizontal tectonic stress directly determines whether the zonal disintegration phenomenon occurs, and it is the key factor for the regional failure of the surrounding rock of the deep tunnel. The above conclusions had certain reference value for in-depth study of the failure problem in deep buried tunnels, and provided theoretical support for further discussion of its mechanical mechanism.

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Acknowledgements

This work was supported by State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology/China University of Mining & Technology, Beijing (SKLGDUEK1926) and Science and Technology Project of Jin Pu New Area (JinPu-0103009) and Liaoning Key Research and Development Plan Guidance Project (LiaoNing-2017229007) and The Project of National Natural Science Foundation of China (51374045) and Liao Ning Revitalization Talents Program (XLYC 1807219).

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Authors and Affiliations

  1. Key Laboratory of Disaster Prediction and Control of Complex Structure System, Dalian University, Dalian, 116622, China

    Xunguo Zhu, Yunping Wang & Yan Ren

  2. College of Architectural Engineering, Dalian University, Dalian, 116622, Liaoning, China

    Yan Ren

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  1. Xunguo Zhu
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  2. Yunping Wang
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  3. Yan Ren
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Correspondence to Xunguo Zhu.

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Zhu, X., Wang, Y. & Ren, Y. Numerical Simulation to Research on the Fracture Mechanism of the Surrounding Rock in Deep Tunnels. Geotech Geol Eng 38, 319–327 (2020). https://doi.org/10.1007/s10706-019-01018-5

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  • DOI: https://doi.org/10.1007/s10706-019-01018-5

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