The author applied TEM on the investigation of coal mine gob in a coal mine in Shandong province and a city in Hebei province,and all the two projects have been well justified.

• 笔者将瞬变电磁法用于新汶某煤矿边界老窑采空区探测及河北某城镇采空区圈定,均取得良好的效果。