【摘要】 岩爆是高地应力区地下工程洞室开挖施工中常见的一类动力失稳地质灾害现象。作者根据川藏公路二郎山隧道和雅砻江锦屏二级水电站引水隧洞勘探中的岩爆实例调研 ,详细地描述了岩爆破坏的几何形态特征 ,并通过岩爆岩石断口扫描电镜分析和岩爆岩石力学测试等研究 ,总结出岩爆形成的力学机制主要有压致拉裂、压致剪切拉裂、弯曲鼓折 (溃屈 )等 3种基本类型。更多还原

【Abstract】 Rockburst is often encountered in the underground engineerings of high geostress area, it is a kind of dynamic geodisaster.Depending on the examples of rockburst in the Erlang mountain highway tunnel and Jinping second powerstation tunnel, the fracture geometry shapes of rockburst are elaborated. Through the research of SEM analysis and rock mechanics tests of rockburst, three basic mechanics mechanisms of rockburst have been summarized,i.e., compression cracking, compression shear cracking,bending and breaking.更多还原