静动态加载下岩石结构破坏时的能量分析  

Energy analysis of rock structure under static and dynamic loading conditions

作　　者：黎立云[1,2] 鞠杨[1] 赵占文[1] 王利[1] 卢菁芳[1] 马旭[1] 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤炭学报》2009年第6期737-740,共4页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)基金资助项目(2002CB412705);国家自然科学基金资助项目(40472145)

摘　　要：设计了岩石孔洞结构试件,对其分别进行静态加载和动态冲击实验,对试件的破坏模式进行理论上的预估计,观察了破坏现象的差异.分别实测了结构的输入能与储存的可释放应变能,利用表面能的概念分析并计算了破坏过程中的耗散能;通过能量守恒原理对破碎后岩石颗粒的飞溅速度进行了初步估计,理论估计值与实验中通过高速摄像机所捕捉到的速度值基本吻合.Rock specimens with holes were designed and tested under static and dynamic uniaxial loading tions. Failure patterns were pre-estimated by theories and different failure cases were observed. Total input and releasable energy for specimens were measured. Dissipated energy was also calculated using the value face energy of the rock. Splashing velocities of rock particles were calculated based on energy conservation condienergy of surprinciple. Calculated results are approximately consistent with the velocities gained by high-speed camera.

关 键 词：静动态加载 岩石结构 总输入能 可释放应变能 耗散能 

分 类 号：TU458[建筑科学—岩土工程]