Characteristics of roof water inflow and control technology for high intensity mining in Dongsheng Mining Area，Shenfu Coalfield

In view of the threat of roof water disasters in coal mining in western China, the water inflow data of 50 working faces are counted in Dongsheng Mining Area of Shenfu Coalfield, and five typical water inflow characteristics are summarized, which are dynamic recharge-led sustained growth type, the increasing first and then stabilizing type with “dynamic-static” reserves acting together, continuous stability of micro inflow, differential hydrogeological conditions locally prominent type, and the increasing first and then decreasing type dominated by static reserves. According to the law of each type of water inrush, the corresponding ideas and measures of water disaster prevention and control are put forward. When the working face is strongly recharged by the side, the curtain closure measures can be used as the main measure with drainage and pressure reduction as the auxiliary measure according to the actual hydrogeological conditions. When the working face is mainly recharged by the static reserves of the roof aquifer, the drainage and pressure reduction can be carried out in advance. When the working face is supplied by the water inflow in the water rich area(or goaf) of the roof aquifer, comprehensive measures such as drainage and grouting treatment can be taken to eliminate local water disasters. The research results provide reference for the prevention and control of water disasters in the mining areas in western China threatened by roof water disasters.