低地应力区地下洞室开挖后围岩位移二维离散元数值模拟

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英文篇名：2D Discrete Element Method simulating displacement characteristics of surrounding rockmass of underground excavation in the low ground stress region 中文刊名：水利水电技术 英文刊名：Water Resources and Hydropower Engineering 作者：胡夏嵩 ; 赵法锁 英文作者：HU Xia-song~(1 ; 2) ; ZHAO Fa-suo~(3)(1.Department of Engineering Mechanics ; Tsinghua University ; Beijing100084 ; China ; 2. Department of Hydraulic and Electric Power Engineering ; Qinghai University ; Xining810016 ; China ; 3.College of Geological Engineering and Geometics Engineering ; Chang'an University ; Xi'an710064 ; China) 中文关键词：低地应力区 ; 地下洞室 ; 围岩位移 ; 二维离散元法 英文关键词：low groundstress region ; underground excavation ; surrounding rockmass displacement ; 2D Discrete Element Method 出版日期：2004-09-20 机构：清华大学工程力学系,长安大学地质工程与测绘工程学院 北京　100084青海大学水利电力工程系青海　西宁　810016 ,陕西　西安　710064 年：2004 期：09 出版单位：水利水电技术

摘要

以西北某水利工程地下洞室为例,对低地应力状态下洞室开挖后围岩位移变化及其相应特征,采用了二维离散元法进行数值模拟研究,结果表明:低地应力区地下洞室开挖后围岩位移主要发生在拱顶位置,而发生在侧壁水平位置上的围岩位移量则明显不及前者,这说明低地应力区地下洞室开挖后围岩变形破坏主要发生在洞顶垂直方向,侧壁水平方向围岩变形破坏规模和强度均不及前者.
2D Discrete Element Method(DEM) is used to simulate the displacement characteristics of surrounding rockmass in the low ground stress region,and one water conservancy underground excavation engineering project in Northwest China is taken as an example. The simulated results show that displacement amount would be formed at the roof and both sides,but displacement amount at the roof of underground excavation is bigger than those at the both sides. It also means that the deformation and failure would be formed at the roof and both sides of underground excavation,but the deformation and failure of rockmass at the roof of underground excavation are especially more serious than those at both sides.

引文

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