广西地震台网数字记录爆破事件典型特征分析
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摘要
分析了2008—2012年广西地震台网数字爆破事件数字记录波形典型特征,结果表明:广西地区爆破的时间分布具有明显规律性,优势分布在中午与下午,晚上基本上不进行爆破作业,爆破地点固定。广西地震台网记录到的爆破发生在龙滩水库、扶绥昌平、南宁双定的采石场,龙滩水库的爆破震级分布主要在ML0.0~0.9,扶绥昌平、南宁双定的爆破震级分布主要在ML1.0~2.3之间,强度较低。广西地区爆破产生的P波方向呈四象限向上分布,爆破持续时间短、衰减快,S波周期较大且发育好,与天然地震波形存在明显的区别。正确识别爆破事件,对判断地震和爆破信号具有参考价值。
The paper analyses the typical characteristics of blasting events recorded by Guangxi seismological network during 2008 and 2012. The results show that the temporal distribution of blasting in Guangxi region have obvious regularity, which mainly occur after the duty on noonday and afternoon in fixed place, and hardly ever occur in night. Blasting events recorded by Guangxi seismological network mainly occurr in Longtan reservoir,Fushui-changping, Nanning-shuangding. Magnitude of blasting in Longtan reservoir are mainly ranged from 0.0to 0.9(ML, below identical), magnitude of blasting in Fushui-changping, Nanning-shuangding are mainly ranged from 1.0 to 2.3. Direction of P wave generated by blasting with short duration and fast attenuation in Guangxi region is upward distribution with four quadrants. Period of S wave with good development is larger,which is obviously different from natural seismic waveform. Correct identification of blasting events can provide some reference for the judgement of earthquakes and explosions signal.
引文
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