摘要
根据岩爆实例调研,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。现场测试结果则表明,岩爆发生时,其判据σθRb至少应大于0.3。
According to the examples of rockbursts in the Erlang mountain highway tunnel and Jinping second powerstation tunnel,the fracture geometry shapes of rockbursts are elaborated.Through the research of scanning electron microscope(SEM)analysis and rock mechanics tests of rockbursts,three basic mechanical mechanisms of rockburst have been summarized,i.e.compression cracking,compression shear cracking,bending and breaking.The measurements on the spots have comfirmed that the judgement σ θ Rb must be at least more than0.3when rockburst happens.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第3期300-303,共4页
Rock and Soil Mechanics
关键词
扫描电镜分析
岩爆
力学机制
岩爆判据
scanning electron microscope analysis
rockburst
mechanical mechanism
judgement of rockburst
