河南平顶山平煤矿区天然地震和人工爆破的波形特征及识别判据

Waveform characteristics and identification criteria of earthquakes and explosions in Pingmei mining area

基于河南测震台网记录的平顶山平煤矿区及周边发生的天然地震和人工爆破资料,按照直观、可快速识别的要求,选用发震时刻、P波初动方向、振幅比、振幅与尾波持续时间比等方法,对该地区天然地震和人工爆破进行对比分析。结果表明,P波与S波最大振幅之比(Pm/Sm)是识别该地区地震类型的最有效判据;P波初动振幅与S波最大振幅之比(Pc/Sm)和S波最大振幅与尾波持续时间之比(Sm/T)2种方法可以作为辅助判据,以提高识别地震类型的准确性。

Based on seismograms of natural earthquakes and explosions that occurred in the Pingmei mining area and are recorded by the Henan Seismic Network,proceeding from the requirements of intuitive and rapid identification,this paper analyzes differences between earthquakes and explosions from the aspects of occurrence time,P-wave first-motion polarity,amplitude ratio,the ratio of amplitude and coda duration,et al.The results show that the P-wave maximum amplitude to S-wave maximum amplitude ratio(Pm/Sm)is the most effective method for identifying the seismic type in this area.Two other methods including P-wave first-motion amplitude to S-wave maximum amplitude ratio(Pc/Sm)and S-wave maximum amplitude to coda wave duration ratio(Sm/T)can provide auxiliary evidence for improving the accuracy of seismic type identification.The research results can provide a reference for"The automatic recognition system of non-natural earthquakes in Henan Seismic Network".