硬质场地电阻率成像测试技术应用研究  

Resistivity Imaging Technology Applications in Hard Field Research

作　　者：谭磊[1,2] 张平松[1,3] 孙斌杨 薛敏[1] 

机构地区：[1]安徽理工大学地球与环境学院,淮南232001 [2]浙江广川工程咨询有限公司,杭州310020 [3]全国煤炭行业矿井水害综合防治工程研究中心,淮南232001

出　　处：《科学技术与工程》2016年第5期26-31,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(41172137);浙江省公益技术研究社会发展基金项目(2011C23049);国家大学生创新创业训练计划项目(AH201410361004)资助

摘　　要：针对硬质场地上直流电法电极安装难、且现场人员存在对探测成果质疑等现象,通过构建了空洞和岩土层地电模型,讨论表层不同大小和范围的高电阻触发地电场响应特征。认为表层高接地电阻会导致地电场时空分布规律发生改变,造成虚假信息增多,且干扰了对目标体信号的识别。基于此表层高电阻对测试效果影响较大,进一步提出硬质场地降阻电极,开展了对地层和空洞地下模型测试试验。结果表明降阻电极测试结果与常规电极基本吻合,两者都能准确识别目标体的空间参数信息,为硬质场地等接地电阻高的硬质环境提供了一种有用的解决方法。Aiming at the difficulty of DC electrode installation on hard site, and field staff＇ s doubt on detection results, cavity and rock-soil layer of geoelectric model were constructed, and discussed the electric field response characteristics triggered by high resistance with various surface layer sizes and scopes. Besides, the high ground re- sistance of surface layer could change the space-time distribution of electric field was argued, and increased false in- formation and interfered in the target signal recognition. Because the high resistance of surface layer had greater in- fluence on the effect of the test, hard ground resistance reduction electrode further put be forward and carried out stratum and cavity underground model tests. The results show that the test result of reduction electrode basically ac- cords with the conventional electrode. Both of them can accurately identify the space parameter information of the target body, and provide a useful solution for the hard environment of high ground resistance such as hard ground.

关 键 词：接地电阻 硬质场地 数值模拟 直流电法 

分 类 号：P631.322[天文地球—地质矿产勘探]