【作者】 费鸿禄； 徐小荷； 唐春安；

【Author】 Fei Honglu Xu Xiaohe Tang Chun’an (Northeastern University,Shenyang 110006)

【机构】 东北大学采矿系；

【摘要】 岩石试件失稳破坏时的声发射具有丰富的信息。通过在普通试验机上对岩爆模拟材料进行失稳破坏的声发射序列的分析,证明失稳破坏与稳定破坏的声发射序列显著不同;失稳时的声发射总数与时间的图象表明,临近失稳时的曲线斜率比加载之初的斜率大二倍以上;而稳定破坏时的斜率基本保持不变。失稳破坏时的声发射具有突发性;稳定破坏时的声发射具有较好的连续性。更多还原

【Abstract】 There is abundand information contained in process of rock unstable failure.By studing the AE sequence of simulation material under soft loading conditions,it is found that there is big difference between unstable failure and stable failure. The results of AE counts vs.time in unstable conditions show that the slope of the AE curve when closing to the unstable critical point is two times larger than that of far away from that point,whereas in the stable loading conditions,the slope nearly keeps constant.In the unstable failure there is a sudden jump of AE whereas in the stable failure,te AE varies smoothly.更多还原