多种物探方法在断层探测中的工作思路与对比应用—以广西灵山地区活动断层探测为例

Abstract

以广西灵山重点研究区活动断层探测为背景，本文介绍了在隐伏区多种物探方法工作思路和对比应用。在对前人资料综合分析的基础上，选择石塘镇大龙村R测线作为综合比对探测试验场。根据分层探测的工作思路，首先采用了高密度电法进行初探，其次分别采用了地震映像、地震反射波法和地质雷达探测，逐步追踪了断层上断点埋深在2 m的位置。最后通过大型探槽揭露了断层上断点埋深在1 m位置，是一条全新世活动断层。综合探测成果表明，高密度电法、地震映像和地质雷达组合探测能够满足灵山重点研究区活动断层探测需要。 Based on the background of active fault detecting in the major study area of Lingshan Guangxi, this paper introduces the work thought and comparison & application to the methods of geophysical prospecting in the buried area. Based on the comprehensive analysis to the previous data, the line R located at Dalong village Shitang town is selected to be the site for the integrated test exploration. According to the work thought of layered detecting, the high density resistivity method has been used firstly, followed by the seismic imaging method, refraction waves method and ground penetrating radar, tracing the upper breakpoint of the fault located at the depth of 2 m. Finally, with the help of large-scale investigation pit, the upper breakpoint of the fault has been exposed at the depth of 1 m, which is a holocene active fault. The comprehensive detecting result shows that the methods combination of high density resistivity method, seismic imaging method and ground penetrating radar meet the need of the active fault detecting in the major study area of Lingshan.