| 坑道直流电阻率法超前探测研究 |
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| 引用本文： | 黄俊革,王家林,阮百尧.坑道直流电阻率法超前探测研究[J].地球物理学报,2006,49(5):1529-1538. |
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| 作者姓名： | 黄俊革 王家林 阮百尧 |
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| 作者单位： | 1.同济大学海洋与地球科学学院，上海 200092 2 桂林工学院资源与环境工程系，桂林 541004 |
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| 基金项目： | 国家自然科学基金，上海市博士后科学基金，同济大学校科研和教改项目 |
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| 摘 要： | 坑道空腔的存在使其周围电场分布不同于全空间的电场分布.以无限大板状体为例求解全空间电场分布，提出探厚比概念以讨论超前探测极限问题.通过对比全空间与坑道内超前探测异常形态可知，坑道空腔只会影响极距较小时的视电阻率幅值，不会掩盖迎头前方地质体的异常响应.大量模型计算结果表明，电阻率异常极值位置与板状体位置之间的差异在5～10倍之间，且同时受到异常体厚度、电性以及板状体倾角的影响.仅利用电阻率极值位置准确解释超前探测异常的难度较大.
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| 关 键 词： | 坑道 电阻率 探厚比 超前探测 |
| 文章编号： | 0001-5733（2006）05-1529-10 |
| 收稿时间： | 2005-09-26 |
| 修稿时间： | 2005-09-262006-05-09 |
A study on advanced detection using DC resistivity method in tunnel |
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| HUANG Jun-Ge,WANG Jia-Lin,RUAN Bai-Yao.A study on advanced detection using DC resistivity method in tunnel[J].Chinese Journal of Geophysics,2006,49(5):1529-1538. |
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| Authors: | HUANG Jun-Ge WANG Jia-Lin RUAN Bai-Yao |
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| Institution: | 1.School of Ocean and Earth Science, Tongji University, Shanghai 200092, China 2 Department of Resource and Environment Engineering, Guilin Institute of Technology, Guilin 541004,China |
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| Abstract: | The distribution of the electric field around a tunnel is different from that in full space because of the tunnel cavity effect. Taking the infinite plate for instance, the distribution of electric field in full space is solved and detection thickness ratio is presented to discuss the limit of advanced detection. The apparent resistivity can be influenced by on small spacing of electrodes, but the anomaly of geologic bodies ahead of the tunnel is not screened by the tunnel cavity's effect. The calculating results of many models show that the place of the anomalous extreme is 5～10 times the plate and influenced by thickness and electric property of the plate. It is difficult to determine exactly the geologic body only using the place of the anomalous extreme. |
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| Keywords: | Tunnel Resistivity Detect-thickness ratio Advanced detection |
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