Yunjialing coal mine has enjoyed long history of both exploration and mining. The wide range of mining, numerous aquifer, complex structure, which is a big hidden danger to the safe production of coal mine. Based on the exploration and exploitation of geological data, through regional and minefield hydrological conditions analysis, this paper researched the seven aquifers detailed within the scope of mine and the mine water filling source and water filling channel. Through the analysis of mine water inflow, water inrush and the difficulty to control water, considered that the hydrogeological type of 2# coal mining is classified as medium type. According to the hydro-geological conditions, we put forward water hazard control measures,such as, advance detection, reserved coal pilla, grouting reinforcement, and so on.