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一、前言地下洞室开挖在天然岩体中,因此,它的工作状态取决于岩体的地质条件、力学特性以及地应力大小和方向等,因素甚为复杂。特别是断层带的存在,对地下洞室围岩稳定性极为不利。它不仅使围岩强度大为降低,而且对洞周的应力分布也产生严重影响。所以,地下工程断层带的力学分析是个很重要的问题。凭借模型试验研究加以验证和评价,是重要的手段之一。
I. INTRODUCTION Underground caverns are excavated in natural rocks. Therefore, the working conditions of underground caverns depend on the geologic conditions and mechanical properties of rock mass as well as the magnitude and direction of ground stress. The factors are very complex. In particular, the presence of fault zone is extremely unfavorable to the stability of underground caverns. It not only greatly reduces the strength of the surrounding rock, but also has a serious impact on the stress distribution around the hole. Therefore, the mechanical analysis of underground engineering fault zone is a very important issue. With the model test research to verify and evaluate, is one of the important means.