The unclear problem of excavating site and water in mini-type coal mine destructive area existed in original Xingwangzhuang and Lizhuang of Xinzhouyao Mine Datong Group. In order to guarantee mining safety, precisely detect whether there were water areas in coal seam of production work and provide scientific drain geological data to water control, detecting goaf water with geophysical exploration methods was applied, which provided drilling of water exploration in construction floor with accurate and reliable location.