基于3DEC的地下厂房围岩稳定性分析

Analysis of Stability for Underground Powerhouse Based On 3DEC

岩滩扩建工程地下厂房开挖区位于中生代华力西期辉绿岩内,厂房洞室及其上下游洞室交叉部位岩体结构面是一套比较短小的Ⅴ级硬性结构面,分析地下厂房围岩块体稳定性具有重要意义。文章采用3DEC(离散单元法)定性分析岩滩扩建工程地下厂房围岩块体稳定性,得出各开挖面可能移动块体的分布情况,确定关键块体的影响深度,为设计有效的加固方案提供依据。

The Excavation zone of underground powerhouse In Yantan Hydmpower Station Extension Project is located in Variscan diabase rock which belongs to Mesozoic era. The dominant structural surface of the surrounding rock is more short-small, which belongs to the v grade of hard structural surface. The analysis of stability for extension project underground powerhouse surrounding rock is very important. The paper analyses the stability of cave room surrounding rock by the way of 3dee, the distribution of unstable key block and maximal effeeting depth of stochastic block of powerhouse roof are confirmed, which provides the basis for the effective reinforcement of extension project underground powerhouse .