Xingyuan mine, four mining area of thin bedrock area, no. 6 coal mine threatened by overlying pebbles at the bottom of the quaternary system aquifer water disasters, with reference to the mining area geological exploration of hydrogeology engineering and the building, water, railway and main shaft and coal pillars left in coal mining with pressure regulation and other relevant provisions, calculate the sublevel mining height of broken protective layer thickness and the height of waterproof coal rock pillar, formulated the mining of fully mechanized mining face in thin bedrock region scientific control of mining height, prevent quaternary gravel layer at the bottom of the water inrush of technical solution, practice shows that the effect is good.