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本文利用遥测传输台网可见记录和磁带记录对厂坝炮爆破进行地震波动力学特性分析,发现各次爆破记录有一致性。对失真信号进行滤波处理,经凝聚函数分析证明了爆源的一致性。对1987年1月8日迭部Ms=5.9地震的分析,表明由于介质状态的改变,记录到的地震波优势频率向高频方向移动。在近震中有关台站上,地震波位移谱出现多峰与能量分散现象,拐角频率也向高频方向移动,振幅比呈现低—高—发震的形态。在地震前二十几天,主频处地震波衰减小,而震后明显变大。上述特征可能与该地震孕育过程中应力水平和介质状态变化有关。
In this paper, telemetry transmission network visible records and tape records on the dam blasting seismic wave dynamics analysis of the characteristics and found that the blasting records consistent. The distortion signal is filtered and the consistency of the explosion source is proved by the agglomeration function analysis. The analysis of the Diebu Ms = 5.9 earthquake on January 8, 1987 shows that the dominant frequency of the recorded seismic wave moves toward the high frequency due to the change of the medium state. At the relevant stations in the near earthquakes, the displacement spectrum of seismic waves shows multi-peak and energy dispersion, and the corner frequency also moves to the high-frequency direction, and the amplitude ratio appears low-high-earthquakes. In the first few days before the earthquake, the seismic wave attenuation at the main frequency was small, but obviously larger after the earthquake. The above characteristics may be related to the stress level and the change of the medium state during the earthquake breeding process.