高密度电法三电位电极系装置勘察适用性研究  

Applicability of tri-potential electrode arrays of high density resistivity

作　　者：李彬[1] 庹先国[2] 汪楷洋[3] 张赓[3] 

机构地区：[1]四川省地质工程勘察院,四川成都610072 [2]西南科技大学国防科技学院,四川绵阳621010 [3]成都理工大学地球探测与信息技术教育部重点实验室,四川成都610059

出　　处：《煤田地质与勘探》2015年第1期86-90,共5页Coal Geology & Exploration

基　　金：国家杰出青年科学基金项目(41025015);地质灾害防治国家重点实验室基金项目(SKLGP2010Z002)

摘　　要：为了对比分析高密度电法三电位电极系α、β和γ排列针对工程中常见的基岩面、充水断层以及充填型地下空洞等类型地质体适用性的差异,首先建立相关地电模型进行正演模拟计算,并对计算电阻率进行加噪二维反演,再以工程应用实例进行验证和进一步讨论。正演与实例对比结果表明:β排列在地形等干扰条件较小时对充水断层以及充填型地下空洞分辨能力较强;α排列为基岩面探测最理想装置,而当存在一定地形等干扰条件时,α、γ排列应分别为地下空洞和近直立断层勘探的最佳装置。In order to comparatively analyze the applicability of the α, β and γ arrays of high density resistivity withtri-potential electrode in prospecting several kinds of common geological bodies, such as the bedrock surface, the water-bearing fault and the filled underground hollow, first, the authors built some pertinent resistivity geologic modelsto calculate their resistivity and then add noise to execute two dimensional resistivity inversion, then some engineeringapplication instances have been used to verify the forward simulation results and do further analysis. The analysis resultsof the forward simulation and application instances show that the β array has the best resolution in detecting thewater-bearing fault and the filled underground void when there is almost no topography and other interferential conditions,the α array is the ideal device of exploring the bedrock surface, but when there exist some topography interference,the α and γ arrays will be the best device to detect the underground void and nearly vertical fault respectively.

关 键 词：高密度电法 三电位电极系 断层 基岩面 地下空洞 

分 类 号：P631[天文地球—地质矿产勘探]