Study on parametric 3D modeling technology of mine roadway based on BIM and GIS
LI Mei, KANG Jitong, LIU Hui, LI Zhaoyang, LIU Xi, ZHU Qing, XIAO Binhu
北京大学 遥感与地理信息系统研究所中煤能源研究院有限责任公司北京龙软科技股份有限公司中煤陕西榆林能源化工有限公司大海则煤矿
巷道三维BIM建模具有数据结构复杂、细节信息量大等特点,在几何和语义上与GIS巷道三维模型相差很大,因此难以进行直接数据集成。为更好地利用GIS的空间分析功能和BIM的精细化建模功能,提出了基于BIM与GIS的矿山巷道参数化三维建模技术。首先设计了考虑BIM层次细节和GIS空间拓扑的巷道三维数据模型和数据结构,包括了结点、中间点、巷道弧段、巷道中线和三角网等多类型几何数据,能够管理巷道相关的地质素描、巷道设计、通风网络、避灾线路的各类专业参数;其次,提出了三维巷道网络拓扑关系处理方法,通过GIS的空间拓扑编辑功能构建标准化巷道中线网络数据集;最后,提出了参数化BIM巷道三维建模流程,即读取巷道中线数据集及参数,构建基本巷道BIM模型,利用布尔运算技术处理巷道硐室、拐弯和交岔点等复杂情况,生成的BIM模型可以充分展现巷道形态、支护等细节,也保留了GIS巷道网络拓扑关系,提高了数据的可集成性。采用布尔运算算法与常见的线框建模算法进行比对后,发现布尔方法在不同断面类型的巷道交岔点处理效果更佳。研究成果已经在大海则煤矿透明地质保障系统中得到应用,支持udatasmith、obj、fbx等多类型标准化三维数据格式,生成的三维巷道模型能够为煤矿避灾路线生成、通风网络解算、路径导航、智能地质保障等提供可视化与网络分析服务。
The 3D BIM modeling of roadway has the characteristics of complex data structure and large amount of detailed information, which is very different from the 3D model of GIS roadway in geometry and semantics, so it is difficult to carry out direct data integration. In order to make better use of the spatial analysis function of GIS and the refined modeling function of BIM, a roadway parameter modeling method was proposed to better utilize GIS spatial analysis and BIM modeling functions. Firstly, the roadway 3D data model and data structure considering the BIM level details and GIS spatial topology, including nodes, middle points, arcs, center-lines and triangular networks, were designed to connect the GIS topological network model and BIM Level of Detail model together, and to add attributes of geological, mine support design, ventilation, and evacuation of roadway. Secondly, a method for processing the topology relationship of 3D roadway network was proposed, and a standardized roadway centerline network data set was constructed through the spatial topology editing function of GIS. Finally, the parametric roadway modeling method was proposed, that is, reading the roadway centerline data set and parameters, constructing a basic roadway BIM model, and using Boolean operation technology to deal with complex conditions such as roadway chambers, turns and intersections. The model can fully display the details of the roadway shape and support, and also retains the GIS roadway network topology relationship, which improves the integratability of the data. Compared the Boolean algorithms with the wireframe algorithms, it is found that the Boolean method has better shapes on the intersection points of roadway with different section types. The research results have been applied in the Transparent Geological Model System of Dahaize Coal Mine, which supports multiple types of standardized 3D data formats such as udatasmith, obj, fbx and the other 3D data formats. The 3D model can not only provide 3D visualization, but also provide complete 3D data analysis services for emergency evacuation, roadway navigation, mine ventilation and geological assurance system.
roadway;BIM;GIS parametric modeling method;3D model;transparent geological model system
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会