中文摘要：

巷道是矿山工程的核心，巷道三维建模是数字矿山建设的重要组成部分。根据二维巷道沿巷道中心线对称的特性及三维巷道在剖面上呈对称的特性，提出一种新的巷道三维建模方法——巷道对称建模法，该方法实现了巷道相交等复杂情况的正确建模，解决了常规巷道三维建模方法存在的问题。基于对称建模方法，设计了3D巷道数据结构，以三叉形和十字形巷道的构建为例，采用VC＋＋，结合OpenGL实现了巷道三维模型的构建和可视化。

英文摘要：

Tunnels are the core of mine projects, and 3D tunnel modeling is an important component of digital mine construction. In light of the 2D tunnel feature of symmetry along tunnel center line and the 3D tunnel feature of symmetry on sections, a new 3D tunnel modeling method-tunnel symmetrical modeling is proposed, which is capable of a correct modeling for cases such as tunnel intersection and has solved the problem in conventional 3D tunnel modeling. Based on this symmetrical modeling, a 3 D tunnel data architecture is designed and used, in combination with VC ＋ ＋ and OpenGL, to realize the building and visualization of 3D tunnel modeling for trifurcate shaped and cross shaped tunnels.