摘要
从岩石的变形和破坏过程中的能量储存和能量耗散出发,指出岩石的单轴抗压强度与单轴抗拉强度之比值可以表征结构较完整岩石的弹性变形能的储存能力以及峰值前后的应变量之比值可以表征岩石的能量储存与耗散之间的相对大小,提出用这两种比值的乘积作为岩爆倾向性指标。采用铜陵有色金属公司冬瓜山深部矿床的典型矿岩进行试验,对这种新的岩爆倾向性指标与现有的岩爆倾向性指标进行对比分析,结合该矿床实际的岩爆调查,说明新指标可以较好地表征岩石的岩爆倾向性,并提出了这种新指标判据的初步建议。
From point of view of energy accumulation and energy dissipation during deformation and break of rock, it is pointed out that the ratio of uniaxial compressive strength to uniaxial tensile strength can show the accumulation performance of elastic deformation energy of rock with relatively complete texture and the ratio of total strain before peak strength to total strain after peak strength can show the relation between energy accumulation and energy dissipation. The rockburst proneness index is defined as the product of the two ratios. Testing study is made on the typical rocks at the deep deposit of Dongguashan Mine,Tongling Nonferrous Metal Corporation. Based on the testing results and the investigation of actual rock burst at the mine,the index is analyzed by contrast to existing rockburst proneness index and is verified to be able to show fairly well the rockburst proneness. Finally,a criterion of rockburst proneness is put forward.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第6期874-878,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家"九五"科技攻关资助项目(96-116-01-01-02)。
关键词
岩爆
倾向性指标
能量储存
能量耗散
rock burst,proneness index,energy accumulation,energy dissipation
