D mine modeling has became a popular subject of the study of visual mine system in recent years. In this paper, the basic principle and key technologies of developing virtual mine system based on OpenGL are introduced, two methods of three-dimensional graphics modeling for virtual mine system are put forward, then in combination with an example, the total design thought, overall frame, and function modules of the simulation software of virtual mine are described in detail. These are of important significance to the safety in mining, the optimum design of mine and the visualization of simulation calculation of mine.