›› 2012, Vol. 33 ›› Issue (11): 3271-3277.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on stress state of circular openings based on shearing slip

LI Jie1,LI Wen-pei1, 2,SHI Cun-cheng1, 3,WANG De-rong1,FAN Peng-xian1   

  1. 1. State Key Laboratory of Explosion & Impact and Disaster Prevention & Mitigation, PLA University of Science and Technology, Nanjing 210007, China; 2. Navy Institute of Engineering Design and Research, Beijing 100070, China; 3. The Fifth Department, The Second Artillery Command College, Wuhan 430012, China
  • Received:2012-07-08 Online:2012-11-12 Published:2012-11-14

Abstract: A computation model of circular openings based on nonlinear constitutive relationship along slip lines is introduced. Discontinuous expressions for stress state around the openings after excavation are deduced based on the model. Distributions and values of stresses in surrounding rock are controlled by a uncertain load parameter, which could be determined by introducing a boundary condition. Stress distribution curves of surrounding rock in different ranges of the load parameter are obtained, where the ranges of the load parameter are determined by stress state in surrounding rock. The discontinuous analytical solutions of surrounding rock stress state are consistent with the numerical solutions of two dimensional finite element code for local shear strain.

Key words: circular opening, discontinuous, analytical solution, slip line

CLC Number: 

  • TU 45
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