Abstract: As the mining intensity of large-scale mines in the Yulin-Shenmu mining area gradually increases, the excessive water inrush into the mines has led to a worsening problem of groundwater resource waste.This paper takes the 117 fully mechanized top-coal caving face of the Jinjitan Coal Mine in the area as the research object.Based on the analysis of the characteristics of water inrush changes during the mining process, the characteristics of water level changes in the aquifers, and the development characteristics of the water-conducting fracture zones, combined with the occurrence characteristics of coal seams and mining conditions on the mining face, the water filling characteristics of the mining face during the mining process are studied.The study finds that as the mining intensity and the growth of the water-conducting fracture zones increase, the water-filled aquifers during the mining process of the mining face gradually change from the Yan'an Formation and Zhiluo Formation sandstone aquifers to the Yan'an Formation, Zhiluo Formation, weathered bedrock, and Quaternary aquifers.Based on the characteristic of high sand content in the loess layer of the Lishi Formation within the area, the changing trend of the internal water-filled channels in the loess layer of the Lishi Formation from formation and expansion to stable development under the influence of mining and groundwater was analyzed.This study provides reference for water prevention and control in medium-depth mines in the area as well as groundwater resource protection.