| 高阻空洞的瞬变电磁响应特征及其探测效果 |
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| 引用本文： | 李成,朱军,陈剑杰,韩吉民.高阻空洞的瞬变电磁响应特征及其探测效果[J].煤田地质与勘探,2012,40(6):79-81. |
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| 作者姓名： | 李成 朱军 陈剑杰 韩吉民 |
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| 摘 要： | 通过球体电磁响应的计算,对低阻围岩中高阻球体模型电磁响应测量结果进行了分析,获得了高阻球体的异常特征。对干旱地区深埋土洞的工程探测结果表明:高阻土洞的瞬变电磁响应特征与模拟实验结果类似,对高阻目标体具有较好的探测效果;高阻体引起的瞬变电磁场异常范围大于目标体实际规模。
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| 关 键 词： | 瞬变电磁法 高阻空洞 响应特征 |
| 收稿时间： | 2011-12-03 |
Transient electromagnetic response characteristics of an underground high resistivity cave and practical detection effect |
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| Abstract: | The authors calculated the transient electromagnetic response for a sphere and measured the transient electromagnetic method (TEM) response results of a high resistivity sphere buried in a low resistivity surrounding rocks in a model experiment, and achieved the transient electromagnetic response features of the high resistivity sphere object. An exploration for a deep-buried soil cave filled with air was conducted by TEM and the results shows that the transient electromagnetic response of high resistivity cave is similar as in the model experiment. It is concluded that the electromagnetic method is effective in detecting high resistivity targets although the extent of high resistivity anomaly is larger than that of the real cave. |
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