Underground whole-space transient electromagnetic (UWTEM) method was tested at the driving face of a drift in a coal mine for detecting water-bearing zones ahead of tunneling.

• 根据初探结果,采用不共面同轴偶极观测方式时,UWTEM在巷道掘进头前方的有效探测范围约为70m,巷道每掘进50m进行一次跟踪探测。