摘要
本文运用全平面应变问题的力学模型及复变函数方法,求得线弹性介质中任意断面形状的地下巷道围岩应力场的解析解。以半圆拱形巷道为例,依据应变能准则,分析了各种地应力场下不同的巷道开挖方向对围岩稳定性的影响。结论为:影响围岩稳定性的诸因素中,地应力场水平主应力的影响最为显著。当地应力场一定时,应尽可能选择地应力场中的两个水平主应力数值较大的方向作为巷道的开挖方向,这样有利于巷道围岩的稳定。定量分析的结论与过去的某些实践经验相符。
Analytical solution is given for stress field around an opening excavated in elastic medium of arbitrary cross-section by applying a mechanical model of complete plane strain and a method of complex variable function in this paper.The influence of orientation of an opening in various underground stress fields on stability of country rock is discussed on the basis of strain energy criterion,using a semicircular arch opening as an example. Among many factors the principal horizontal stresses in the underground stress field are the most important ones.When a stress field is given,an opening should be driven in the same direction of two principal horizontal stresses of higher values in the stress field to improve stability of surrounding rock.The conclusions of quantitative analysis are in agreement to those obtained by past experience.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1990年第3期62-71,共10页
Journal of China Coal Society
关键词
巷道
开挖
方向
力学分析
orientation of underground opening
complete plane strain
me-chanical analysis
