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According to the data of draining test, we simulated the Ordovician limestone aquifer seepage field by MODFLOW module of GMS (Groundwater Modeling System). After numerical simulation model building, we successfully simulated the seepage field formed by draining test and dynamic changes in the water level by model recognition and inspection. The results reflect that lateral connectivity and hydraulic connection of fissure and crevasse is weak in Ordovician limestone aquifer. The study provides theoretical base and practical references for safe mining of No.11 coal seam which is threatened by Ordovician limestone aquifer confined water. Keywords-draining test; seepage field; MODFLOW; numerical simulation; model recognition and inspection

Ordovician Limestone Aquifer Seepage Field Simulation Based on Modflow