An Improved Symmetrical Modeling Method on 3D Tunnel Modeling

Tunnel is core of mine projects, and 3D tunnel is the important element of 3D geological models for digital mine. According to symmetry of two-dimensional tunnel along the centerline of the tunnel and symmetry of three-dimensional tunnel profiles along centerline, the paper introduced a method of new 3D tunnel modeling: symmetrical modeling, which can be used to realize the modeling of tunnels´ intersection. It has resolved the problem that conventional modeling methods existed. But, there are several issues with method, such as data redundancy. Based on introduction of symmetrical modeling, the method is improved by analyzing existed issues. On the platform of Window XP, the MS Visual C++6.0 is selected as the tool of software development and the OpenGL is chosen as the main graphics manipulated tool, the visualization of models is constructed and realized. It is tested that the improved method inherits the merits of the original method and overcomes its´ shortcomings, so that the 3D tunnel model is generated with high efficiency.