浅层人工地震精确探测隐伏断层方法研究

Research on Shallow Artificial Seismic Precise Detection of Concealed Faults

选取长治市某区区域性地震安全评价项目中宋家庄断裂和安城断裂等隐伏断层精确探测成果,从数据采集、资料处理和解释三方面,对浅层人工地震观测进行研究。在获得高精度成像地震剖面的基础上,结合区内地质资料,对新近系与第四系厚度,断层的位置、性质、产状以及上断点埋深等关键参数进行推断解释。结果表明,浅层人工地震能够精确探测目标区隐伏断层,并为其活动性鉴定提供可靠的基础资料,是区域性地震安全评价工作中目标区主要隐伏断层勘查的重要手段。

A case study of seismic safety evaluation project in a specific district in Changzhi City,Shanxi province is taken to conduct comprehensive research on the accurate observation of multiple concealed faults such as Anjiazhuang and Ancheng through artificial shallow two-dimensional seismic observation.The research focuses on three aspects:data acquisition,processing,and interpretation.Based on obtaining high-precision imaging seismic profiles,key parameters such as the thickness of the Quaternary cover layer,the location,nature,and attitude of the faults,and the burial depth of the upper fault plane are inferred and interpreted.The results indicate that shallow seismic surveys can accurately detect concealed faults in the target area and provide reliable basic data for their activity identification.It can serve as an important method for the exploration of major concealed faults in the target area during regional seismic safety evaluation work.