›› 2010, Vol. 31 ›› Issue (8): 2655-2660.

• Numerical Analysis • Previous Articles     Next Articles

Visual modeling of complex FLAC3D model based on TetGen

JING Yong-bin 1,2, WANG Li-guan 1,2, JIA Ming-tao 1,2, CHEN Jian-hong   

  1. 1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China; 2. Research Center of Digital Mine, Central South University, Changsha 410083, China
  • Received:2009-11-13 Online:2010-08-10 Published:2010-08-30

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Abstract:

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.

Key words: numerical simulation, excavation of rock mass, surface model reconstruction, tetrahedralization, TetGen

CLC Number: 

  • TU 454
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