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中文摘要：
提出一种新的矿井通风系统三维联通巷道建模算法即多层闭合轮廓线联合法（Combining Multi-layer Closedcontour Algorithm,CMCA）。对已有的通风系统单线图进行求交、打断等操作,建立节点—正向弧—反向弧网络拓扑结构图;采取逆时针搜索、最外层闭合轮廓线优先提取策略,提取网络拓扑结构图中的所有闭合轮廓线;并对所有闭合轮廓线进行右偏移操作,从而生成一组闭合轮廓线。根据用户输入的生成精度,在巷道顶底板间插入若干与巷道底板平行的面,将巷道在空间上分割成对应的若干层,即可在每一层生成一组闭合轮廓线。然后将这一系列闭合轮廓线三角化,再合并所有三角网格,最终形成三维联通巷道表面模型。CMCA已用于DIMINE数字矿山系统的通风模块中,并在实际矿井通风工程中得到应用。研究结果表明：采用闭合轮廓线法生成通风系统三维联通巷道,实现简单,结果正确,能准确反映矿井巷道的内部联通状况及真实三维空间形态,为矿井通风系统三维联通巷道模型的建立提供了一种新的有效方法。
英文摘要：
Combining Multi-layer Closed contour Algorithm （CMCA） was presented. This novel algorithm is used to establish 3D-interconnected laneway model for mine ventilation simulate system. According to generative precision input by user, the laneway was segmented into several layers in space by inserting several planes into the roof and floor of laneway. The planes should be parallel to laneway floor. The procedure of CMCA could be described as follows. Intersect and cut the existing single-line laneways of ventilation system, and establish the figure of the node-positive arc-opposite arc network topologic structure; adopt the strategy of searching counter-clockwise and extracting preferentially the outermost closed contour line, and extract all the closed contour lines in the figure of network topologic structure. By excursing the closed contour lines to the right side, generate a series of closed contour lines. Finally, by triangulating these contour lines of each layer and merging all the triangular meshes, generate the 3D-interconnected laneway surface model. CMCA was used in the mine ventilation module of DIMINE digital mine system and utilized in practical mine ventilation engineering. The utilization of this algorithm shows that the 3D-interconnected laneways in mine ventilation simulate system is generated by using CMCA, with simple implementation and correct result, which can reflect accurately the internal connection status and the actual 3D spatial form of the mine laneway. CMCA provides an effective way for establishing 3D-interconnected laneway model in mine ventilation simulate system.
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