Abstract: In order to master water yield property condition of 36810 working face and prevent the occurrence of mine flood,Baijiazhuang coal mine used transient electromagnetic method to detect water yield property of 36810 working face roof.Through combining material of hydrography to analyze and study the detection results,it find that face convey gateway and rail roadway's roof has developed strong rich water development within 100 m and cutting hole's roof is normal.