REFINED MODELING OF COMPLEX GEOLOGICAL BODY BASED ON THERE-DIMENSIONAL LASER SCANNING TECHNIQUE

In the platform of FLAC^3D software, how to build the three-dimensional models of complex geological bodies is always a difficulty encountered by many numerical simulation operators. On the other hand, the three-dimensional laser scanning technique presents a unique advantage in obtaining the fine spatial data of complex objects. Therefore, by the aid of reverse engineering, a new modeling method of complex geological bodies in FLAC^3D platform is proposed. The accurate spatial and geometric information of complex geological bodies is firstly obtained by employing three-dimensional laser scanning technique. The point cloud data describing surface characteristics of complex geological bodies is processed and its surface model is then reconstructed in CAD format. Using the formidable geometry cleanup and mesh generation function of Hypermesh software, the surface model is transformed into three-dimensional finite element model. The node and element information can be translated into the format which can be received by FLAC^3D. According to the above processes, the model data for FLAC^3D is generated and the refined model of complex geological bodies is created in the pre-processing of FLAC^3D.the feasibility and practicability of this approach is verified by combining practical project.