水利工程异常地质体地球物理探测分析与应用

Geophysical exploration analysis and application of abnormal geological bodies in water conservancy engineering

水利工程建设中常见对工程危害较大的破碎带、蚀变带、岩性接触带、岩溶等异常地质体,查明异常地质体的空间分布尤为重要。本文通过分析其地球物理参数特征,提出了采用基于电性参数、弹性参数差异为基础的高密度电法、瞬变电磁法、孔内声波测试等地球物理方法进行探测的工作思路,并在白龙江引水工程、广西长塘水库工程中加以应用,查明了各异常地质体的分布范围及地球物理参数特征,取得了良好效果,为工程建设发挥了重要作用。

In the construction of water conservancy engineering projects,it is crucial to identify the spatial distribution of common but potentially hazardous abnormal geological bodies such as fractured zones,alteration zones,lithological contact zones,and karst formations.This paper,through the analysis of their geophysical parameter characteristics,proposes a methodological approach using geophysical techniques based on differences in electrical and elastic parameters.These include high-density resistivity method,transient electromagnetic method,and borehole acoustic testing.The approach was applied in the Bailongjiang Water Diversion Project and the Guangxi Changtang Reservoir Project.It successfully identified the distribution range and geophysical parameter characteristics of each abnormal geological body,achieving positive results and playing a significant role in the construction of these projects.