Open AccessResearch and analysis on residual shear strength of surrounding rock base on elastic-plastic softening model
Author(s) -
Heng Zhou,
Ying Zhang,
Лю Бо,
Shengjie Di,
P. M. Huang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/780/4/042034
Subject(s) - cohesion (chemistry) , friction angle , softening , geotechnical engineering , residual strength , shear (geology) , geology , internal friction , materials science , residual , plasticity , rock mass classification , composite material , mathematics , chemistry , organic chemistry , algorithm
The excavation of caverns caused the unloading of the surrounding rock, which decrease the strength of the rock mass. In this paper, an ideal elastic-plastic stress-strain softening model is used to analyse the shear strength sensitivity of the surrounding rock during cavern excavation, in order to research the relationship between deformation, stress, plastic zone and the strength parameters. The results show that the values of each shear strength parameter have a significant effect on the distance of the plastic zone, and the sensitivity of the plastic zone distance shows that the influence of peak internal friction angle, residual internal friction angle, residual cohesion and peak cohesion decreased successively.