Abstract: Three dimensional (3D) geological models are particularly important for the visualization and intelligent development of coal mines. Bao, an Coal Mine mainly uses a two-dimensional analysis method combining plan and section views,which cannot visually display geological features in three dimensions. To verify the feasibility of 3D geological modeling,taking the 15112 working face of Bao, an Coal Mine as an example,modeling methods were used to construct a 3D geological model of the working face. The 3D geological model accurately depicts the 3D characteristics of coal seams,faults,surrounding rocks,and abnormal areas,effectively improving the transparency of the working face. The coal seam exhibits a synclinal structural feature of being high in the north and south,and low in the middle. The thickness distribution of the coal seam is relatively uniform,mainly concentrated in the range of 3. 2～4. 6 meters,and the overall feature is “ thick in the west and thin in the east”; The reserve calculated using 3D geological modeling method is 1. 722 6 million tons. Compared with traditional estimation methods,the error rate between the model estimation data and the original estimation method is about 2%.