不同冲击速度下岩石破坏能量规律的实验研究  

Failure experimental study on energy laws of rock under differential dynamic impact velocities

作　　者：黎立云[1] 徐志强[1] 谢和平[1,2] 鞠杨[1] 马旭[1] 韩智超[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]四川大学建筑与环境工程学院,四川成都610065

出　　处：《煤炭学报》2011年第12期2007-2011,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2011CB201201;2010CB226802;2010CB226804)

摘　　要：对砂岩试件进行了动态霍普金森杆冲击破坏实验和静态加压破坏实验。对于动态冲击实验,得到了不同冲击速度下岩石试件破坏时的总吸收能、总耗散能和相对应的损伤变量。对于静态加压实验,得到了破坏时的总吸收能。并对两种实验条件下的破坏总吸收能进行了对比分析。实验结果表明,对于砂岩试件,若在单轴压缩下和动态冲击下得到同等程度的破坏,前者会比后者消耗更多的能量。The dynamic impact experiments and static loading experiments for sandstones were conducted.In dynamic impact experiments,the dissipated energy and the total absorbed energy were calculated during sandstone failure process under the different impact velocity.In the static load experiments,the total absorbed energy of sandstones when failure was calculated.Besides,the failure absorbed energy under dynamic impact and static load was contrasted and analyzed.The experiment results show that,in order to achieve the same damage degree,the sandstone can dissipate more energy under static uni-axial load than that under dynamic impact.

关 键 词：动态冲击 破坏总吸收能 静态加载 耗散能 损伤变量 

分 类 号：TD315.1[矿业工程—矿井建设]