| 矿井瞬变电磁法全空间视电阻率解释方法研究 |
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| 引用本文： | 杨海燕,邓居智,张华,岳建华.矿井瞬变电磁法全空间视电阻率解释方法研究[J].地球物理学报,2010,53(3):651-656. |
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| 作者姓名： | 杨海燕 邓居智 张华 岳建华 |
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| 作者单位： | 1.东华理工大学核工程技术学院, 江西抚州 344000;2.中国矿业大学资源与地球科学学院, 江苏徐州 221116 |
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| 基金项目： | 国家重大科技专项，国家自然科学基金项目 |
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| 摘 要： | 从全空间中心回线源响应公式出发,推导了全空间晚期和全区视电阻率公式;通过与半空间公式比较和对实测资料的分析,研究了全空间视电阻率公式的应用效果.结果显示,全空间视电阻率为半空间视电阻率的(5/2)2/3倍,其晚期视电阻率与真值的相对误差小于0.56%,而相应的半空间视电阻率与真值误差均大于42%.与常规解释方法相比,采用全空间全区视电阻率换算方法能更好地圈定低阻异常范围,且电阻率差异大.因此,该公式更适用于矿井瞬变电磁法资料处理与解释,并具有更好的效果.
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| 关 键 词： | 瞬变电磁法 全区视电阻率 瞬变响应 重叠回线 全空间 |
| 收稿时间： | 2009-08-01 |
| 修稿时间： | 2009-11-11 |
Research on full-space apparent resistivity interpretation technique in mine transient electromagnetic method |
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| YANG Hai-Yan,DENG Ju-Zhi,ZHANG Hua,YUE Jian-Hua.Research on full-space apparent resistivity interpretation technique in mine transient electromagnetic method[J].Chinese Journal of Geophysics,2010,53(3):651-656. |
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| Authors: | YANG Hai-Yan DENG Ju-Zhi ZHANG Hua YUE Jian-Hua |
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| Institution: | 1.College of Nuclear Engineering and Technology ECIT, Fuzhou, Jiangxi 344000,China;2.School of Resource and Earth Science, China University of Mining&Technology, Xuzhou, Jiangsu 221116,China |
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| Abstract: | In this paper, full-space late-time and all-time apparent resistivity formula was derived based on homogeneous full-space response equation of central loop. By comparing with half-space formula and analyzing measured data, the application efficiency of this formula was studied. The results indicate that full-space apparent resistivity value is (5/2)~(2/3) times that of half-space; and the relative error between its late-time value and true resistivity is less than 0.56%, while the error of half-space resistivity is greater than 42%. Compared with normal interpretation technique, this method can locate anomaly range, and acquire large resistivity contrast. Therefore, the inter-pretation technique has better applicability and effect for mine transient electromagnetic data. |
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| Keywords: | Transient electromagnetic method All-time apparent resistivity Transient response Coincident loop Full-space |
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