摘要
针对工程建设中常见的地下洞体,从理论和实际应用两方面分析了用瞬变电磁法进行洞体探测的有效性及地下洞体瞬变电磁响应的物理过程和响应特征,给出了地下洞体的数学模型以及球坐标下地下洞体在阶跃电流激励下的瞬变电磁响应表达式。利用瞬变电磁法,对某煤矿的地下采空区进行了探测,其解释结果与钻探资料吻合得很好,证明了在工程勘察中利用该方法探测地下洞体的可行性和有效性。
The availability of the transient electromagnetic method (TEM) for detecting the underground cave in engineering buildings was analyzed theoretically and practically. A mathematical model for expressing the underground cave was given, and the formulas for expressing the transient electromagnetic response in spherical coordinate were presented. The physical and the response features of the TEM for detecting underground cave were analyzed. The TEM was used to detect the digged cavern buried in subsurface of a coal mine. The interpretation results agree well with the drilling data, which shows the feasibility and availability of the TEM for detecting underground cave.
出处
《石油大学学报（自然科学版）》
CSCD
北大核心
2004年第5期135-138,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
国家自然科学基金(49974026)
教育部教育振兴行动计划资助项目
关键词
瞬变电磁法
探测
响应特征
钻探
工程勘察
球坐标
资料
地下
工程建设
电流
transient electromagnetic method
response feature
underground cave
detection technique
feasibility analysis
