中文摘要：

在分析隧道全空间瞬变电磁响应的基础上,提出了异常响应的比值分析法。利用围岩中低阻体的综合响应减去围岩响应,得到低阻体的响应,将低阻体的响应与围岩相除而得到相对异常值。利用相对异常值分析法,研究了围岩中柱状低阻体半径、厚度以及低阻体与激励源间距离的变化对瞬变响应信号的影响。低阻体半径越大,比值越大,最大异常出现的时间越晚;低阻体厚度越大,比值越大,最大异常出现的时间越晚;低阻体与激励源间的距离越小,比值越大,最大异常出现的时间保持不变。工程实际应用表明采用这种分析方法,更易从探测数据发现异常。

英文摘要：

Response of transient electromagnetism in tunnel whole space was analyzed and to exception response was brought forward. Response of a good conductor was gotten ration analytical method by using the integrated responses of the good conductor in surrounding rock minus the responses of surrounding rock, ration of relative exception response was gotten when the response of a good conductor was divided by response of surrounding rock. Using the ration analytical method of relative exception, effect of transient electromagnetic response was researched due to changing source. Radius the radius and depth of a good conductor, the distance between a good conductor and the driving of a good conductor is bigger and the ratio is higher, and the time of the maximum exception occurring is later. Depth of a good conductor is larger and the ratio is higher, and the time of the maximum exception occurring is later. The distance between a good conductor and the diving source is greater and the ratio is higher, and the time of the maximum exception occurring remains the same. Application of practical engineering shows that the exception in detection data is more easy to distinguish by using the ration analytical method.