Abstract: Accumulated water in goaf in coal mines tends to be concentrated, and due to rapid pressure transmission, it can easily break through coal and rock formations, surging into mining areas and causing significant casualties and property damage.As the history of mining extends, coal mines in the Shanxi-Inner Mongolia region generally face threats from water accumulation in goaf.Our analysis shows that the underground water inflow volume of the Hanglaiwan Coal Mine increases with the intensity of mining and the expanding area of the goaf.The monocline structure in the 302 panel area of the mine is conducive to water accumulation in the goaf, posing a threat to subsequent working faces in the area due to water accumulated from earlier mined goafs in the same layer.To alleviate the threat of water accumulation in the goaf of 302 mining area of Hanglaiwan Coal Mine and achieve safe and efficient drainage of water in the goaf of the mine, two schemes of “large-diameter drilling and dewatering from the surface and directional drilling and drainage from underground roadway” for draining water from mined-out areas were designed and compared based on the actual conditions of the mine.Results indicate that surface large-diameter drilling and dewatering is more effective than underground roadway drilling for water drainage from the goaf, ensuring safe and efficient mining operations.