高地应力区地下洞室围岩稳定和变形分析

本文分析总结了已有的地应力研究成果。考虑到高地应力与岩体特性的关系,对岩体采用四参数弹塑性开裂模型,提出了一种高地应力区地下洞室围岩稳定和变形的分析方法。用各种不同初始应力场(大小、方向、主应力比等)对直墙拱顶洞室围岩的稳定和变形状况作了分析比较,得出了一些有规律的成果。

Stability and Deformation Analysis of Rock Surrounding Underground Opening in High Ground Stress Areas

This paper summarizs recent achievements in the research on ground stress.Considering the relation between the feature of rock mass and the state of high ground stress,an elastic-fracture consti- tutive model for rock is adopted.In this model,a four-parameter failure criterion is used to define the ultimate strength.An analysis method of stability and deformation of underground opening excavated in high ground stress areas is proposed.Using various initial stress fields(such as the magnitude,the direction and the ratio of principal stresses so on),comparative analyses of stability and deformation of the rock around an underground opening in high ground stress areas are carried out and some results of regularity are obtained.