利用台阵方法对明灯1号50吨爆破微弱信号的识别与处理

Using Array Methods to Identify and Process the Weak Signals Generated by the first Brightlight 50t Explosion

针对海拉尔台阵记录的明灯1号50吨爆破,利用台阵技术对该爆破进行了微弱信号识别处理、台阵定位、速度谱分析等研究。结果表明,聚束处理明显增加了信噪比,清晰地显出本来微弱的信号。利用f-k分析进行的定位结果表明,该爆破的主要能量集中在1-8 Hz。速度谱分析给出了明确的震相位置,使原本不可能看到的信号清晰地表现出来,而聚束功率分析在方位角-慢度域给出了与理论值相近的能量分布。

Waveforms generated by the first Brightlight 50t explosion were recorded by the Hailar array. Using array technique, the author performed identification, f-k analysis, velocity spectrum analysis, etc of the weak signals. The analysis results show that the signal-to-noise ratio after beaming was enhanced obviously and the signal can be shown clearly. The energy of this explosion is mainly concentrated in 1-8 Hz range from the f-k analysis. The velocity spectrum analysis gave clear positions of event phases, which can not be seen in the original weak signals. The maximum energy distribution resulted from beaman method is near the theoretical value in the azimuth-slowness domain.