Abstract: Based on the study of regional hydrogeological conditions, combined with hydrogeological supplementary exploration and previous exploration results, the geological conditions of mining area, mine and first mining area are further studied, with emphasis on the sedimentary conditions, sedimentary environment, porosity permeability, roof hydrochemical characteristics of Yan'an Formation and Zhiluo Formation which are directly water-filling aquifers in the mine. The characteristics of overburden structure and water enrichment characteristics of roof aquifer under multi-facie sedimentary conditions in Bayangaole mine are evaluated. The results show that the aquiferous sandstone is distributed in bands, and the water abundance of aquifer is uneven due to the influence of sedimentary environment, mainly with static groundwater storage and limited dynamic storage. The results provide basic basis for roof water drainage and development characteristics of water-conducting fractured zone.