双向加压下岩石能量规律的实验研究  

The energy variety analysis of rock under biaxial compression

作　　者：黎立云[1,2] 王荣新[1] 马旭[1] 赵占文[1] 许岩岩[1] 卢箐芳[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]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

出　　处：《煤炭学报》2010年第12期2033-2038,共6页Journal of China Coal Society

基　　金：国家重点基础研究发展规划(973)项目(2010CB226802;2011CB201201);国家自然科学基金资助项目(41072242)

摘　　要：在保持侧向压力基本稳定的条件下,对岩石试件进行了竖向反复加卸载直至破坏的双向压缩实验,得到了不同侧压及不同竖向压力下卸载的等效卸载弹性模量;对岩石试件还进行了双向同步加卸载直至破坏实验,得到了不同加载速度及不同双向压力下卸载的等效卸载弹性模量;两种实验都得到了破坏时的总吸收能、总耗散能和总可释放应变能。同时完成了方板中心圆孔岩石试件在不同加载速度下的双向压缩红外热成像实验。实验结果表明,加载速度越高,则试件表面平均温度越低;反之,亦然。The cyclic vertical loading-unloading biaxial compression tests of marble under several fixed transverse pressures were carried out.Another synchronous biaxial compression test of marble was also carried out.Unloading elastic modulus in these two situations were obtained.Correspondingly the total absorbed energy,releasable strain energy and dissipative energy in above two failure progress were also obtained.The thermal infrared biaxial compression experiment of holed foursquare specimen under different loading rate was done.The experimental result shows that the higher the loading rate is,the lower the average temperature of specimens surface is,vice versa.

关 键 词：双向压缩 卸载弹性模量 加载速度 总破坏吸收能 耗散能 可释放应变能 

分 类 号：TD315[矿业工程—矿井建设]