基于GOCAD的三维地质模型构建

3D geological modeling method based on GOCAD

阐明了利用GOCAD进行三维地质建模的思路及主要建模步骤。以哨牌矿区为例,利用GOCAD模拟了该区从震旦系灯影组到第四系地层及断裂。在模拟地形、地层及构造面时通过离散光滑插值技术(DSI)很好地消除了单纯的由克里金插值产生的畸变。由面模型向体模型转化时选用GOCAD的SGrid代替SOLID功能,更加方便准确的反应了真实地质情况。最后分析了GOCAD生成三维地质模型的实际应用并绘制Slicer法剖面图。

Basing on the study of the professional 3 D geological modeling software GOCAD, this article summarized the modeling principle and process. Combined with the obtained landform and geological data about faults and stratum from Dengying formation in Simian system to Quaternary system, the 3 D geological visualized modeling of Shaopai mining area is built up by GOCAD. In this model, the DSI （discreted smooth interpolation）could clear up the aberration caused by Kriging when the landform, stratum and structural surface simulate are simulated. It is easily to reflect the actual geological condi- tion by utilizing SGrid function instead of SOLID when face model is translated into volume mode. Fi- nally, the application of the 3D geological modeling by using GOCAD was shown and the Slicer profile was given.