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3-D inversion of high density resistivity method based on 2-D high-density electrical prospecting data and its engineering application |
Fan-Song MENG1, Gang ZHANG1( ), Meng-Jun CHEN1, Huai-Liang LI2 |
1. School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621000,China 2. Key Laboratory for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang 621000,China |
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Abstract The two-dimensional high density electrical method can overcome the limitation of three-dimensional high density electrical method on topography and cost. The 3d high density electrical method can effectively solve the deficiency of two-dimensional high density electrical method in detecting space morphology. Therefore, Three-dimensional inversion of data obtained from two-dimensional exploration of high density electrical method has not only realized the three-dimensional visualization of underground space structure but also avoided the impact of topography and cost. Applying this method to the exploration of karst caves, using DUK-2A high density electrical system to collect data, and then convert the two-dimensional high density data into three dimensional inverse data, the results of the inversion can be obtained by any 3d dielectric section, by Slicer Dicer, in order to get rich information about the cave, finally, the interpretation of karst cave is made by combining the 3d dielectric section and borehole data, providing scientific basis for the smooth operation of the project, the feasibility and validity of this method are proved.
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Received: 22 June 2018
Published: 31 May 2019
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Corresponding Authors:
Gang ZHANG
E-mail: zg@swust.edu.cn
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The configuration of 2D high-density resistivity method
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The configuration of 3D high-density resistivity method
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Schematic diagram of 3D data acquisition mode of bipolar device
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| Res2dinv读入数据格式 | Res3dinv读入数据格式 | 行数 | 注释 | 注释 | 第1行 | 测线名称 | 数据标题 | 第2行 | 电极距 | x方向网格数 | 第3行 | 跑极方式:温纳=1,二极=2, 偶极-偶极=3,联剖=6,施伦贝尔=7 | y方向网格数 | 第4行 | 测点数 | x方向单位电极距 | 第5行 | 测量数据点x位置的类型 | y方向单位电极距 | 第6行 | IP数据标志 | 排列种类:温纳=1,二极=2,偶极-偶极=3,联剖=6,施伦贝尔=7 | 第7行 | x位置,电极距,测量的电阻率值 | 数据总个数 | 第8行 | x位置,电极距,测量的电阻率值 | 供电电极x位置,供电电极y位置,测量电极x位置,测量电极y位置,电阻率 | … | x位置,电极距,测量的电阻率值 | 供电电极x位置,供电电极y位置,测量电极x位置,测量电极y位置,电阻率 | 第n行 | 地形数据标志 | 地形数据标志 | 第n+1行 | 地形数据数 | x和y坐标类型 | 第n+2行 | 地形数据 | 地形数据,地形数据,地形数据… | … | 地形数据 | 地形数据,地形数据,地形数据… |
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Reading in the data format of Res2dinv and Res3dinv
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Indication of electrode arrangement for measuring wire
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Topography of survey area and layout diagram of survey line
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Data processing flow chart
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Two-dimensional(a) and three-dimensional(b) inversion results of each line measured by high-density resistivity method
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Three-dimensional geoelectric model
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