Abstract: This article focuses on the research on the prevention and control technology of roof water hazards under the close-range thick coal seam under the third aquifer in the upper part of the third aquifer in layer 5-1 of the Xinbai mine fi eld in Anxin coal fi eld, through geophysical exploration, calculation of water fl owing fractured zone, special hydrogeological drilling, borehole dredging, drilling verifi cation and other methods, the threat of water disaster in working face is eliminated, according to the analysis report of water disaster control,the scheme of water prevention and control in working face is put forward, it ensures the safety production ofthe mine.