摘要
为了充分发挥FLAC3D在数值计算方面的优势,解决在复杂地质体条件下岩体工程开挖存在的计算模型构建难度大、多采用简化模型而影响计算结果可靠性及准确性的问题。提出采用三维表面模型重建方法建立地质体及岩体工程的表面模型,确定岩层、开挖等的封闭空间区域;在此基础上,通过约束德洛内四面体剖分的方法对三维表面模型形成的空间区域进行网格剖分。分析了网格生成器TetGen的输入、输出数据结构,确定表面模型数据至TetGen、TetGen网格划分结果至FLAC3D的对应关系,实现能够准确描述地质体与工程开挖的FLAC3D计算模型的构建。通过某大型深部开采铜矿的多个岩层和首采区3个盘区63个采场的模型构建实例,证明该方法简单、可行、有效并且健壮。
For excavation of rock mass in complex geological body,simplification methods of the numerical models are often utilized in that accurate models are difficult to construct.However,the reliability and accuracy of the computed results rely heavily on the model.A new method is proposed to construct the FLAC3D model which can depict the geological body and excavation of rock mass accurately.Geological and excavation surface models are built from their boundaries to define the three-dimensional domains.Then,TetGen is used to generate the constrained Delaunay tetrahedralizations（CDTs） and quality tetrahedral meshes.The input and output data structure of TetGen is analyzed to transfer data from surface model to TetGen and from TetGen to FLAC3D model.The FLAC3D model of a deep mining copper mine is constructed,including several strata and 63 stopes.The results prove that this method is simple,feasible,effective and robust.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第8期2655-2660,共6页
Rock and Soil Mechanics
基金
国家自然科学基金项目(No.50774092)
关键词
数值模拟
岩体开挖
表面模型重建
四面体剖分
TetGen
numerical simulation
excavation of rock mass
surface model reconstruction
tetrahedralization
TetGen
