大理岩三轴压缩动态卸围压与岩爆模拟分析

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英文篇名：Experimental study on dynamic unloading of the confining pressures for a marble under triaxial compression and simulation analyses of rock burst 中文刊名：辽宁工程技术大学学报 英文刊名：Journal of Liaoning Technical University 作者：徐松林 ; 吴文 ; 张华 英文作者：XU Song-lin ; WU Wen ; ZHANG Hua (Department of Modern Mechanics ; University of Science and Technology of China ; Hefei 230026 ; China) 中文关键词：岩爆 ; 动态卸围压 ; 模拟分析 英文关键词：rock burst ; dynamic unloading the confining pressures ; simulation analysis 出版日期：2002-10-25 机构：中国科学技术大学力学与机械工程系,中国科学院武汉岩土力学研究所,中国科学院武汉岩土力学研究所 安徽合肥230026 ,湖北武汉430071 ,湖北武汉430071 年：2002 期：05 出版单位：辽宁工程技术大学学报

摘要

对岩爆研究的现状进行较详细阐述。为分析岩爆形成机理,采用大理岩分别进行了三轴压缩峰前峰后动态卸围压实验。结合分岔过程,对三轴压缩过程的剪切断裂能进行分析,其结果表明:峰前卸围压过程的剪切断裂能远低于峰后卸围压过程和常规三轴压缩过程;而此过程岩体的破坏程度则强烈得多。由此也说明,张拉破坏是岩爆产生的根本内因。
Both in-situ and laboratory studies proposed nowadays on rock burst were briefly reported in present paper. In order to analyze the mechanism of rock burst, experimental analyses on dynamic unloading the confining pressures at the pre- and post-peak were conducted for a marble under triaxial compression. Bifurcation method was introduced in the discussion of shear fracture energy of these processes. The results show that the energy in the process of unloading the confining pressures at the pre-peak is much lower than those at the post-peak and the conventional triaxial compression, while the specimens failed much more seriously. It could be concluded that it was the local tensile failure in rock that led to rock burst.

引文

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