适合于城市活断层探测中的激发震源

A SEISMIC SOURCEFOR DETECTING ACTIVE SOURCE IN URBAN AREAS

激发地震波的震源是地震勘探的关键因素,只有在震源激发出的地震波信号具有足够的能量和宽频带的前提下,才有可能接收到地下界面产生的反射波,也才使数据采集、处理和解释具有实际意义。这里介绍了二种用于城市活断层探测中的激发震源,并就其工作原理、技术指标、激发参数和对比试验效果进行了阐述,试验研究结果表明:夯击震源和可控震源均能满足城市活断层探测的需要。虽然如此,在城市活断层探测中,尤其在城市特定环境下(不允许炸药震源激发、各种外界干扰十分严重),仍需根据工作需要和测区实际情况,合理选取激发震源。

A seismic source, the key factor for seismic survey, should be able to excite signals with adequate energy and frequency band, so as to produce detectable reflections and thus make data processing significant. Two seismic sources suitable for detecting active faults in urban areas, Wacker and Vibroses, have been decribed in the paper, and with their principles, technical specifications and exciting parameters introduced. Results of comparison test show that both seismic sources could meet the requirements o...