摘要
以华亭矿区砚北煤矿为背景,对开采过程中冲击地压事件的声发射(AE)与压力前兆特征进行了分析。分析结果表明:在冲击地压发生前,冲击地压"源"处的岩体内部声发射和压力呈现出一定的相关变化规律,即表现出明显的前兆特征和相互耦合模式:"升压平静—降压活跃"模式,即压力变化整体趋势为上升时,声发射进入平静期,当压力变化整体趋势为下降时,声发射表现活跃;"升压降压平静"模式,即当压力上升和下降期间,声发射均处于平静期。这种特征和模式可以作为冲击地压事件预测的判别依据。
Taking Yanbei Coal Mine of Huating mining area as background,precursory characteristics of acoustic emission and pressure for rock burst events in the course of mining were analyzed.The results show that acoustic emission and pressure in rock body of rock burst ＂source＂ present some related change law before rock burst,which exhibits obvious precursory characteristics and intercoupling model.＂Pressor-quiet and depressurizing-active＂model,it means that when the overall trend of pressure variation increases,acoustic emission goes into quiet period,conversely,when it decreases,the acoustic emission presents active.＂Pressor and depressurizing quiet＂ model,namely,no matter the pressure goes up or down,acoustic emission always keeps in the quiet period.This feature and model can be used as distinguish basis to predict rock burst events.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第A01期1-5,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51174015)
国家高技术研究发展计划(863)重点资助项目(2008AA062104)
国家重点基础研究发展计划(973)资助项目(2010CB226803)
关键词
冲击地压
声发射
压力
判别模式
rock burst
acoustic emission
pressure
discrimination model
