摘要
自然地应力场及结构面分布特征是地下岩体工程围岩稳定性的主要内在控制因素。本文基于数值计算和实际工程的变形监测分析表明:①随侧压系数的增大,含断层围岩的稳定性变差;②不同应力状态下断层分布位置对围岩稳定性的控制作用差异明显;③当围岩附近断层与洞室开挖面不相交且水平构造应力场较大时,围岩可能产生更大的变形或更大范围的失稳。
The stability of underground rock masses engineering is mostly controlled by field stress and the distribution of structural plane. The detailed studies carried out in this paper based on numerical method and deformation monitoring of actual engineering show： ① The stability of underground openings containing a fault is worse when the side stress coefficient is gradually increasing; ②The controlled effect on stability of underground openings containing a fault is obviously different under different stress state; ③More deformation or instable zone of underground openings can happen when the fault close-by and non-intersect excavatingj surface and horizontal tectonic stress field is larger. These results would offer a guideline in evaluation of large underground openings.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2009年第3期71-76,81,共7页
Hydrogeology & Engineering Geology
基金
国家自然科学基金雅砻江水电开发联合研究基金重点项目(50539050)
教育部博士点新教师基金(200806111012)
关键词
岩石力学
地下洞室
地应力
断层
围岩稳定
rock mechanics
underground openings
field stress
fault
stability of surrounding rock masses
