高密度电阻率法在地质环境调查中的应用研究

Application of high density resistivity method to the environmental investigation: A case history of disastrous earthquake area of Tianquan county

天全县地处四川盆地西部边缘，紧邻雅安市芦山县，是2013 年芦山地震的重灾区之一。天全县物产丰富，蕴含着大量的矿产资源，具有十分巨大的勘探潜力。本文重点对地震灾区的地质环境进行深入的调查研究，根据物理模拟和数值模拟实验对比，研究了高密度电阻率法的优缺点与勘探效果，进一步证实了此方法的科学性与可行性。结合天全地区的地球物理特征，应用高密度电阻率法判定滑坡体、断层和破碎带，圈定破碎带位置。依据电阻率的高低，确定地表土面厚度、基岩面埋深等。为后期的灾后重建及合理优化勘探工程的布置提供更加可靠的理论依据。

The Tianquan county is located in the western edge of the Sichuan Basin, adjacent to Lushan, and is oneof the disastrous earthquake area of Lushan in 2013. Tianquan is not only abundant, contains a large amount ofmineral resources, but also has the great exploration potential. This paper focuses on the geological environment ofthe disastrous earthquake area to conduct a thorough investigation and study. According to the physical simulationand the numerical simulation experiments, the advantages and disadvantages of the high density resistivity methodand the exploration result are studied, it further proves that the method is scientific and feasible. Combined with thegeophysical characteristics of Tianquan region, the landslide, fault and fractured zone are determined by the highdensity resistivity method and the location of the fractured zones are located. The thickness of surface soil and thedepth of bedrock surface are determined based on the level of the resistivity, which provides more reliabletheoretical basis for the post-disaster reconstruction and the reasonable layout of the exploration project.