围岩破坏特征与地应力方向关系研究

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摘要结合实际工程需要，建立片帮分级标准，在此基础上提出由片帮发育部位和发育程度推测主应力方向的相关方法；同时，结合室内试验、切片扫描等手段，深入研究片帮面上拉张裂纹的成因机制，给出由拉张裂纹延伸方向确定初始地应力方向的方法。最后以我国西南一水电工程为例，基于坝址区片帮和拉张裂纹的调研结果，推测坝址区大主应力方向及其变化规律，对地应力测试工作形成有效补充，为后期工程设计提供支撑。

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关键词 ：岩石力学, 地应力, 围岩破坏, 片帮, 拉张裂纹, 工程应用

Abstract：Considering practical engineering needs，the classification standard of spalling is established；and a related method for speculating the principal stress direction by the development position and development degree of spalling is proposed. Meanwhile，combining laboratory tests，biopsy scanning and other means，the generated mechanism of tensile crack on spalling face is deeply studied；and a related method for determining initial geostress directions by extended direction of tensile crack is also given. Finally，taking a hydropower project in southwest China for example，on the basis of the investigate and research results of spalling and tensile crack at dam site，principal stress direction and its variations are speculated，which forms the effective complement to geostress test and provides strong support for the later engineering designs.

Key words： rock mechanics geostress surrounding rock failure spalling tensile crack engineering application

引用本文:

张宜虎，卢轶然，周火明，钟作武. 围岩破坏特征与地应力方向关系研究[J]. 岩石力学与工程学报, 2010, 29(S2): 3526-3535.
ZHANG Yihu，LU Yiran，ZHOU Huoming，ZHONG Zuowu. STUDY OF RELATIONSHIP BETWEEN FAILURE PROPERTIES OF SURROUNDING ROCK AND DIRECTION OF GEOSTRESS. , 2010, 29(S2): 3526-3535.

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http://www.rockmech.org/CN/Y2010/V29/IS2/3526

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