Abstract: Based on the analysis of hydrogeological conditions in Zhuxianzhuang coal mine, the fracture development process of overburden roof of 8105 extra thick coal seam working face is analyzed by using empirical formula, numerical analysis and similar simulation.Considering the coupling effect of mining stress and seepage, the seepage evolution law of upper aquifer with the advance of working face is studied, and the roof water inrush risk is predicted.The results show that with the continuous advance of the working face, the height of fracture development in the goaf of 8105 working face is 72 m, which is basically consistent with the calculation result of empirical formula method.Through the numerical simulation analysis, it is found that the aquifer is affected by mining, and the pore water does not enter the goaf.The distance between the maximum height of fracture development and the pore water is 15 m.In order to ensure the normal mining of 8105 working face, this paper puts forward some prevention measures, such as "drilling in advance to monitor the water inflow of boreholes" "setting reasonable waterproof coal pillar" "timely plugging of bad boreholes", and so on.The research results have certain reference significance for coal seam mining under similar engineering conditions.