不同煤试样冲击倾向性试验结果分析  

Analysis on experimental results of rock burst tendency of different coal samples

作　　者：郭建卿[1,2] 苏承东[2] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《煤炭学报》2009年第7期897-902,共6页Journal of China Coal Society

基　　金：教育部高等学校博士点基金资助项目(20070460001);河南省重点科技攻关资助项目(0424210018)

摘　　要：基于5组不同产地煤样在RMT-150B岩石力学试验系统进行单轴加载、卸载压缩试验.分析结果表明:煤样的弹性变形指标KE与弹性能量指标WE之间线性相关;采用冲击能量指标WN作为煤层冲击倾向性的判别是一种过高的估计,而有效冲击能WY能够较好地反映出煤样在压缩变形破坏过程吸收和释放能量的关系,作为煤层冲击倾向性的判别比较合理;动态破坏时间tD相差悬殊,与其他冲击倾向性判定指标相关性不明显,以tD作为煤的冲击性判定指标需要谨慎.Five group of coal samples from different mines were uniaxial compressed, loading and unloading, with the RMT - 150B rock mechanics experiment system. The results show that elastic deformation index of coal samples （KE ） has linear relationship with elastic energy index （WE ）. It is over estimate that using impact energy index （WK ） to discriminate coal rock burst tendency, but it is very reasonable that using effective impact energy index （WY） which can better reflect the relationship between the absorbed and released energy in the process of coal sam- ple compression deformation. Dynamic destroy time （tD ）, which is different with different coal samples great, hasn＇t relationship with other rock burst tendentiousness indexes.

关 键 词：冲击倾向性 冲击地压 弹性应变能 耗散能 岩石力学 

分 类 号：TU458[建筑科学—岩土工程]