蚀变岩体对洞室围岩稳定性影响研究  

Influence of Altered Rock to the Stability of Cave Surrounding Rock

作　　者：王振[1] 李明霞[1] 黄志全[1] 侯合明[1] 陈宇[1] 

机构地区：[1]华北水利水电学院,河南郑州450011

出　　处：《人民黄河》2012年第3期125-127,共3页Yellow River

基　　金：郑州市创新型科技人才培育计划领军人才项目(10LJRC185);教育部留学回国人员科研启动基金资助项目;华北水利水电学院研究生教育创新计划资助项目(YK2010-08)

摘　　要：通过对天池抽水蓄能电站蚀变岩工程特性的试验研究,查明了蚀变岩蚀变类型、成因及力学性质,同时利用FLAC3D软件建立地下厂房分步开挖三维动态计算模型,对不同计算方案下围岩变形、应力和塑性区分布特征进行比较。结果表明:随着蚀变作用的增强,岩体力学性质显著变差,主厂房顶拱、上下游边墙位移和应力,以及塑性区范围均不断增大,洞室安全性降低,洞室趋于不稳定。Through the comprehensive and in-depth experimental study on the altered rock engineering characteristics of Tianchi Pumped Storage Power Station, the paper identified the type, cause of formation and mechanical properties of the altered rock alteration, then built underground powerhouse excavation three-dimensional dynamic calculation model by FLAC3D software to compare the surrounding rock deformation, stress and plastic zone distribution characteristic of different calculation program. The results show that with the enhance of alteration, the mechanical proper- ties of rock mass decrease significantly. The displacement and stress of main underground powerhouse crown, on the upstream and downstream side wall as well as the range of the plastic zone are increased. The safety of the cavern reduces and the cavern tends to unstable.

关 键 词：蚀变岩 围岩稳定性 塑性区 天池抽水蓄能电站 

分 类 号：TU457[建筑科学—岩土工程]