中文摘要：

三维地下巷道建模是矿山虚拟现实的关键技术,存在建模速度慢、巷道交岔口处容易重合等问题。提出了一种基于中心线断面生成三维地下巷道模型的改进方法,该方法根据原始的CAD二维平面图,通过提取关键点来生成中心线和断面线,快速建立了精确的三维地下巷道模型。以某矿山井下斜坡巷道总体布置图和其-425m中段平面联合布置图为例进行三维巷道生成虚拟现实场景,证明了此改进方法的有效性和实用性。

英文摘要：

This paper presents an improved method based on the center line section to generate three-dimensional underground tunnel.It is based on the original planar diagram of two-dimensional CAD images,through extracting the key points to generate the center line and the line of section,quickly establish a precise three-dimensional underground tunnel model.Taking a mine slope tunnel layout diagram and its-425m level plane combined layout as an example,after generating 3D tunnel in virtual reality scene.