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LSSVM-Based Rock Failure Criterion and Its Application in Numerical Simulation

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  • Changxing Zhu
  • Hongbo Zhao
  • Zhongliang Ru

Abstract

A rock failure criterion is very important for the prediction of the failure of rocks or rock masses in rock mechanics and engineering. Least squares support vector machines (LSSVM) are a powerful tool for addressing complex nonlinear problems. This paper describes a LSSVM-based rock failure criterion for analyzing the deformation of a circular tunnel under different in situ stresses without assuming a function form. First, LSSVM was used to represent the nonlinear relationship between the mechanical properties of rock and the failure behavior of the rock in order to construct a rock failure criterion based on experimental data. Then, this was used in a hypothetical numerical analysis of a circular tunnel to analyze the mechanical behavior of the rock mass surrounding the tunnel. The Mohr-Coulomb and Hoek-Brown failure criteria were also used to analyze the same case, and the results were compared; these clearly indicate that LSSVM can be used to establish a rock failure criterion and to predict the failure of a rock mass during excavation of a circular tunnel.

Suggested Citation

  • Changxing Zhu & Hongbo Zhao & Zhongliang Ru, 2015. "LSSVM-Based Rock Failure Criterion and Its Application in Numerical Simulation," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-13, February.
    • Handle: RePEc:hin:jnlmpe:246068
    DOI: 10.1155/2015/246068
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