Abstract: Taking No. 1 Coal Mine of Datong Coking Coal Mine Company as the research back⁃ ground，the previous geological and hydrological work and its existing problems are systematically ana⁃ lyzed. In view of the water filling characteristics and water hazard threat degree of the 4#，5# and 8# coal seams in the mine，combined with the mining and excavation connection plan of the mine in recent years， coal seam floor high-pressure limestone water mining technology under pressure，the water prevention and control measures for the tunneling roadway and the mining face are put forward，and applications of tran⁃ sient electromagnetic method，induced polarization method and controllable source audio frequency mag⁃ netotelluric method in detecting water accumulation in old goaf of coal mine are expounded，which pro⁃ vides guidance and reference for the prevention and control of water in the coal mine.

Key words: coal mine, water prevention and control, old goaf