高密度电阻率法对泥石流松散堆积层探测效果的分析  

Analysis on Detection Effect for Loose Accumulation of Debris Flow by High Density Resistivity Method

作　　者：籍增贤[1,2] 张正阳 孙永彬 Ji Zengxian;Zhang Zhengyang;Sun Yongbin(Airborne Survey and Remote Sensing Center of Nuclear Inderstry;Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource)

机构地区：[1]核工业航测遥感中心,石家庄市050002 [2]铀资源地球物理勘查技术中心重点实验室,石家庄市050002

出　　处：《勘察科学技术》2020年第4期61-64,共4页Site Investigation Science and Technology

摘　　要：泥石流是严重威胁人民生命和财产安全的地质灾害。常用的槽探和钻探方法工作效率低、投入大、周期长。如何快速准确地查明松散堆积物空间展布特征对于科学评价及防治泥石流灾害尤为重要。该文介绍了采用高密度电阻率法对某泥石流沟域进行了探测,通过对反演电阻率断面图等值线圈闭形态以及高低阻电性层分布情况的分析,快速查明了地表松散堆积层的厚度变化情况及基岩面起伏特征,推断结果得到了后期验证,为泥石流沟域灾害风险评估和治理提供了可靠的地球物理依据,达到了快速、有效、精确的目的。The debris flow is a geological disaster that seriously threatens people′s life and property safety. The commonly used trenching and drilling methods are low efficiency, large investment and long cycle. How to quickly and accurately identify the spatial distribution characteristics of loose accumulation in the gully area is particularly important for scientific evaluation and prevention of debris flow. In this paper,the high-density resistivity method is used to detect a debris flow gully area. Based on the analysis of the closed form of equivalent coils and the distribution of high and low resistivity layers in the pseudo section of apparent resistivity, the variation of thickness of loose accumulation layer on the surface and the fluctuation characteristics of the bedrock surface are quickly identified. The results are verified in the later stage,and it provides a reliable geophysical basis for risk assessment and control of debris flow gully area, and achieves the purpose of rapid, effective and accurate.

关 键 词：高密度电阻率法 松散堆积层 基岩面 低阻层 高阻层 

分 类 号：P631.322[天文地球—地质矿产勘探] P642.23[天文地球—地质学]