Stability Analysis of Water-Resistant Strata in Karst Tunnel Based on Releasable Elastic Strain Energy

Qin Liu, Lai Wei, Jianxun Chen, Yanbin Luo, Pei Huang, Hongyu Wang and Jiaqi Guo

Mathematical Problems in Engineering, 2017, vol. 2017, 1-9

Abstract:

In this paper, the energy instability criterion of water-resistant strata and rock mass failure index (RMFI) are proposed, respectively, based on releasable elastic strain energy . RMFI is employed to represent the damage extent of water-resistant strata. When , rock mass is stable. When , rock mass is in the critical instability state. When , rock mass is unstable. The releasable elastic strain energy and RMFI program is performed by FISH programming language of software. Then, the authors apply software to analyze the distribution law of releasable elastic strain energy and failure zone under different width of concealed karst cave. Finally, combined with the numerical analysis, a case study is carried out to illustrate the rationality, effectiveness, and feasibility through using RMFI to predict safe thickness of water-resistant strata.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:7317394

DOI: 10.1155/2017/7317394

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