浅层纵横波联合勘探在活动断层探测中的应用

The application of combined exploration of shallow P-wave and S-wave to active fault detection

针对活动断层探测中需要深浅兼顾的技术难点,通过浅层地震纵/横波反射联合勘探的应用,取得良好的勘探效果。该方法确定的断层经钻探验证是可靠的。文中阐述了其野外数据采集、室内数据处理和叠加剖面解释的关键技术和参数选取等技术细节。工程实践证实,本文所述的地球物理勘探组合方法在活断层探测中是有效、可靠的,可有效查明活动断层在隐伏区的平面位置及空间展布情况,为城镇防震减灾工作提供科学的地球物理依据。

In tackling the technical difficulties of deep and shallow consideration in active fault exploration,the authors achieved good exploration results through the application of shallow seismic P/S wave reflection combined exploration.The fault identified by this method is proved to be reliable by drilling.In this paper,the key technology and parameters selection of field data acquisition,data processing and stacked section interpretation are described.Engineering practice proves that the geophysical exploration combination method described in this paper is effective and reliable in active fault detection,and can effectively find out the plane position and spatial distribution of active faults in the buried area,thus providing a scientific geophysical basis for earthquake prevention and disaster reduction in cities and towns.