【摘要】 对某矿的采空区围岩试样进行了单轴压缩声发射实验,得到了岩石破坏时能率、事件率等声发射参数值,根据这些数值对声发射监测系统参数进行了设置;通过对声发射监测系统长期运行结果的统计,总结出了井下多种活动即岩石声发射、打钻、爆破、人工破碎大块矿石、放矿、敲击的波形及各类波形的参数范围;确定了以能率、事件率为特征的采空区失稳判据,为判断地压灾害提供了可靠依据。更多还原

【Abstract】 Through uniaxial compression acoustic emission experiments to goaf surrounding rock sample of a Mine,acoustic emission parameter values such as energy rate and event rate were obtained when rock failure.According to these values,parameters of acoustic emission monitoring system were set.Through statistics for long-term operation result of the acoustic emission monitoring system,waveforms of various underground activities namely rock acoustic emission,drilling,blasting,artificial crushing of large ore,ore drawing and percussion and parameter range of all kinds of the waveforms were summarized.Instability criterion of the goaf with characteristics of the energy rate and event rate were determined,so as to provide a reliable basis for judgment of underground pressure disaster.更多还原