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Abstract According to the geological exploration report and production record of Maidizhang Coal Mine, this paper comprehensively analyzed the hydrogeological characteristics and influencing factors of water filling in the mining area from the aspects of geological characteristics, aquifer, aquifuge, water filling source and water filling channel. The results showed that the main sources of mine water filling were sandstone fissure water of Shanxi Formation, Ordovician karst water, accumulated water in goaf, atmospheric precipitation and surface water. Surface water and atmospheric precipitation were seasonal to mine water filling. The water filling channels were mainly faults, collapse columns and coal mining water flowing fissures. The hydrogeological conditions of No.2 coal seam were medium in complexity, which was the current mining coal seam. In daily mining, it was necessary to do a good job in goaf exploration, passing through flood season, daily water inflow drainage and early detection of water conducting structure.
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