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Elasto-Plastic Analysis of the Surrounding Rock of a Tunnel/Roadway Based on the Zienkiewicz-Pande Criterion
1 Heilongjiang Ground Pressure & Gas Control in Deep Mining Key Laboratory, Heilongjiang University of Science and Technology 2 Yuncheng Polytechnic College 3 Key Laboratory of Safe and Effective Coal Mining, Ministry of Education, Anhui University of Science and Technology
Abstract In this paper, based on the Zienkiewicz-Pande criterion, which is a modification of the Mohr-Coulomb criterion, and considering the effects of intermediate principal stress, analytic solutions for the elastic-plastic stress of the surrounding rock of a tunnel/roadway, as well as the radius and displacement of the plastic zone, are deduced using an equilibrium equation. The influence of the intermediate principal stress on the Zienkiewicz-Pande criterion solution is analyzed through a given example, and the plastic zone radius and the distribution of surrounding rock stress are analyzed based on the Zienkiewicz-Pande and Mohr-Coulomb criterions, respectively, showing that the Zienkiewicz-Pande criterion is applicable to the elasto-plastic analysis of the surrounding rock in a tunnel/roadway.
Abstract：
In this paper, based on the Zienkiewicz-Pande criterion, which is a modification of the Mohr-Coulomb criterion, and considering the effects of intermediate principal stress, analytic solutions for the elastic-plastic stress of the surrounding rock of a tunnel/roadway, as well as the radius and displacement of the plastic zone, are deduced using an equilibrium equation. The influence of the intermediate principal stress on the Zienkiewicz-Pande criterion solution is analyzed through a given example, and the plastic zone radius and the distribution of surrounding rock stress are analyzed based on the Zienkiewicz-Pande and Mohr-Coulomb criterions, respectively, showing that the Zienkiewicz-Pande criterion is applicable to the elasto-plastic analysis of the surrounding rock in a tunnel/roadway.
.Elasto-Plastic Analysis of the Surrounding Rock of a Tunnel/Roadway Based on the Zienkiewicz-Pande Criterion[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(2): 30-35
2015, Vol. 52 