| 井地电法点电源供电地表异常电场分布特征实验研究 |
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| 引用本文： | 杜立志,蒋小明,曲俊伟,张旭东,常高奇,李俊江.井地电法点电源供电地表异常电场分布特征实验研究[J].世界地质,2013,32(3):584-589. |
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| 作者姓名： | 杜立志 蒋小明 曲俊伟 张旭东 常高奇 李俊江 |
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| 作者单位： | 吉林大学建设工程学院，长春130026 |
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| 摘 要： | 井地电法供电点位置与地表电位分布关系密切。为研究点电源供电时供电点位于电性异常层上、下不同位置时地表电位的分布特征，通过物理模型研究的方法，采用铜圆柱体作为固定的点电源供电，利用有机玻璃模拟高阻体，通过三维电位观测系统，获得高阻体位于供电源上、下不同深度时水面测得的电位值，计算该值与无异常体存在所测得的背景场电位值的差值作为异常电场，进一步分析异常电场的特征，推断异常体的空间展布情况。模拟实验表明，点源供电时供电点与异常体越近，其地表异常电位值越高，并且供电点源位于异常体下方时其在地表的异常形态越接近其真实形态。
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| 关 键 词： | 井地电法 异常电场 异常体 |
Experimental study on abnormal electric field distribution of surface-borehole electrical method |
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| DU Li-Zhi,JIANG Xiao-Ming,QU Jun-Wei,ZHANG Xu-Dong,CHANG Gao-Qi,LI Jun-Jiang.Experimental study on abnormal electric field distribution of surface-borehole electrical method[J].World Geology,2013,32(3):584-589. |
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| Authors: | DU Li-Zhi JIANG Xiao-Ming QU Jun-Wei ZHANG Xu-Dong CHANG Gao-Qi LI Jun-Jiang |
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| Institution: | College of Construction Engineering，Jilin University，Changchun 130026，China |
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| Abstract: | The surface potential distribution is related to the position of electrical power supply． In order to study the potential distribution with the change of power supply position，we did a series of flume simulation experiments， using a copper cylinder as a power supply point source，plexiglass plate as an oil layer，utilizing three-dimension resistivity method to test the surface potential of every point arranged on the surface of the water． The distribution potential on surface may provide physical basis for analyzing distribution of oil layer． The result of simulation experiment shows that as the abnormal body is closer to the power supply point，the measured anomaly voltage on the surface is higher． When the supply point located below the anomalous body，the distribution of anomaly voltage is closer to the shape of the anomalous body． The character of the electric field can be effective to display the disturbance of high resistance body buried below． |
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| Keywords: | surface-borehole electrical method abnormal electric field anomalous body |
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