据美国矿山健康与安全管理局资料介绍 ,1 995～ 1 999年美国发生的 1 45起矿山死亡事故中的 50 %与地层陷落相关。由于美国及世界其它地区类似事故的频繁发生 ,各国对寻求控测迅急地层陷落途径进行大量的研究。实验室试验证实 ,声波与电磁波的发射与岩石迸裂同时发生。岩体的声 According to the US Mine Health and Safety Administration, 50% of the 1 45 mining accidents in the United States from 1995 to 1999 were related to stratigraphic subsidence. Due to the frequent occurrence of similar accidents in the United States and other parts of the world, a great deal of research has been conducted by various countries on ways of seeking to control the rapid fall of strata. Laboratory tests confirm that both acoustic and electromagnetic emission occur simultaneously with rock burst. Rock sound