The article describes the principle of the transient electromagnetic method and the dual frequency induced polarization method and-these applications to detecting the coal mined-out area with accumulated water in a coal mine.%介绍了瞬变电磁法及双频激电法的工作原理，并以山西临汾某煤矿采空区探测为例，介绍了利用瞬变电磁法和双频激电法探测赋水采空区的情况，取得了良好的效果。
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