关键词: 三维地质建模, 不规则三角网, 工程柱体模型

Abstract: The paper proposes a kind of 3D geological modeling method based on project prism, which is called PPM for short.This method, in light of the borehole data characteristics and stratum distribution law, divides the exploration area into several project prisms based on the horizontal position of boreholes, connects the corresponding ore sections of each prism sides by comparison to get the prism wireframe diagram, and then builds the triangular networks by prism, stratum and plane so as to finally get the triangular network of the whole geological body.The establishment of a 3D stratum model can solve the problems in the complex stratum structure reasoning including pinch-out, bifurcation and fault and the automatic modeling, and facilitate reserve estimation according to reserve classes.This method is of certain reference and guidance significance to the 3D geological modeling based on project prism.

Key words: 3D geological modeling, Irregular triangular network, project prism model