Abstract: Based on the geological background and engineering geological data of Zhaolou Coal Mine in Juye Coalfield，the hydrogeological characteristics and water filling factors of the mine are analyzed. Combined with the underground hydrological observation data and geological drilling pumping test data， the large well method and hydrogeological analogy method are used to predict the mine water inflow. The research shows that the water filling source in the mine is mainly from the coal seam of the upper coal group， and the direct water filling source of the upper coal group is the sandstone aquifer of the roof and floor of the No.3 coal seam and the three ash aquifer of the Taiyuan group. Combined with the actual conditions，it is recommended to use the calculation results of the large well method. It is estimated that the normal water inflow of the mine is 504 m³/h，and the maximum water inflow is 756 m³/h.

Key words: hydrogeology, water inflow prediction, large well method, hydrogeological analogy method