Jiulong Mine with extremely complicated hydrogeological conditions and extremely complicated geological conditions, the coal seams deeply buried, with high water pressure and high mining pressure, the working surface of the 15445N was the wild green working face. Although the area was done with safe recovery mining, in the later stage of the working face, there was still water in the floor. In view of this situation, it was of great significance to analyze the situation of water inflow from the floor of the working face, to clarify the cause of water inrush, improve the treatment technology of the ground area and study the water technology countermeasures of the wild green working face.