低渗透性裂隙岩体水流三维入渗过程的高密度电阻率成像法研究  

Study of low-permeable fractured rock mass in three-dimensional infiltration using high-density electrical resistivity tomography

作　　者：岳宁[1] 王刚[2] 阚飞[1] 董军[1] 黄少文[2] 党慧慧[1] 魏国孝[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]山东农业大学水利土木工程学院,山东泰安271000

出　　处：《兰州大学学报（自然科学版）》2017年第1期9-18,共10页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(41471023;41202174)

摘　　要：通过三维电阻率成像同步测量发生在野外低渗透性裂隙岩体中的水流三维入渗,利用高密度电阻率成像法技术,对其进行了原位试验研究.结果表明:比较入渗前裂隙岩体的背景电阻率特征,岩体中的水流入渗区在利用高密度电阻率成像法所获取的电阻率图像中,呈现出明显的电阻率低阻特征,低阻特征区域空间分布的不均匀性反映了裂隙岩体渗透性相对大小的空间分布特征,并且水流在岩体内的三维入渗也不是均匀的,而是存在着优势入渗现象,尤其是在入渗的早期.对研究低渗透性岩体的非均质性空间分布特征具有重要意义.The three-dimensional infiltration process occurring within the low-permeable fractured rock mass in fields was monitored using high-density electrical resistivity tomography（ERT） by means of the synchronous ERT data measurements in an in-situ experiment.The results indicated that the regions through which water infiltrated presented an obviously low resistivity property,compared with the background resistivity property before infiltration.But the spatial distributions of the low resistivity regions in the resistivity maps were not homogeneous,reflecting the relative permeability distribution in space.And the water infiltration in rock mass was not uniform.There was a preferential infiltration phenomenon especially,in early infiltration.It is very important for us to study the spatial distribution properties of the permeability in a low-permeable medium.

关 键 词：高密度电阻率成像法 水流入渗 裂隙识别 数值模拟 

分 类 号：P345[天文地球—水文科学]