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介绍了新疆呼图壁人工水体大容量气枪震源地震信号发射台的选址、建设过程及震源信号特征。从地质构造、历史地震的角度分析了地震信号发射台选址的合理性、必要性以及气枪激发池设计的合理性。利用激发池岸边的低灵敏地震仪记录到的气枪信号,阐述了气枪震源的高度重复性和人工水体气枪震源信号的稳定性,并对信号进行时频分析后得出,气枪信号的优势频率为2~6Hz。最后通过叠加的方法提高信噪比,得到呼图壁气枪震源信号的传播距离约为380km。
The location, construction process and source signal characteristics of large-capacity air-gun seismic source launch site in Hutubi, Xinjiang were introduced. From the point of view of geological structure and historical earthquake, the rationality and necessity of the seismic signal transmitting station site selection and the rationality of the design of the air gun excitation pool are analyzed. The air gun signal recorded by the low sensitivity seismometer on the shore of the excitation pool is used to describe the highly repetitiveness of the air gun source and the stability of the artificial air body gun source signal. The time-frequency analysis of the signal shows that the dominant frequency of the air gun signal For 2 ~ 6Hz. Finally, the superposition method is adopted to improve the signal-to-noise ratio, and the transmission distance of the Hutubi airgun source signal is about 380km.