Strain Gradient Model of Zonal Disintegration of Rock Mass near Deep-Level Tunnels

C. Z. Qi*, K. R. Li, J. P. Bai, A. I. Chanyshev, Pei Liu

*Corresponding author for this work

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Abstract

This paper presents one strain gradient model of zonal disintegration of rock mass near deep level tunnel. The governing equations and boundary conditions of the model are established. Numerical methods (quasi-Newton method and shooting method) are adopted to solve the obtained fourth-order equilibrium equations with higher order boundary conditions in terms of displacement. The stress field in elastic and plastic zones is obtained. The effects of model parameters on stresses distribution in surrounding the tunnel rock mass are examined. The necessary conditions for the formation of zonal disintegration are elucidated.

Original languageEnglish
Pages (from-to)21-33
Number of pages13
JournalJournal of Mining Science
Volume53
Issue number1
Early online date7 Feb 2017
DOIs
Publication statusE-pub ahead of print - 7 Feb 2017

Keywords

  • Deep-level tunnel
  • rock mass
  • strain gradient model
  • zonal disintegration

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