地球物理方法在城市地震活动断层精确定位中的应用

Application of geophysical method to the precise positioning of urban seismic mobile moving fault

重点讨论了城市地震活动断层精确定位方法.研究结果表明:面对城市的强干扰背景,利用可控震源,采取频率扫描方法和数据处理的互相关技术,可以有效压制强振动干扰,实现城市市区的地震勘探;对于两盘无明显断距的走滑断层可以利用高分辨率地震勘探方法和电法勘探方法进行联合精确的定位;并结合实例讨论了电法勘探的精确定位方法.

This paper mainly discusses the precise positioning method for the urban seismic mobile moving fault, and the study results shows: the frequency sweeping method and the mutual correlation method of data processing can effectively suppress the disturbances from strong vibrations with the vibroseis in the strong-disturbance background in the city so as to carry out the seismic investigations in the urban area; for the sliding faults in which there is no clear fault displacements between the two beds, the high-resolution seismic prospecting method and electrical prospecting method can be used to position the fault precisely; finally, a case is used to demonstrate the precision positioning method based on the electrical prospecting.