面向钻孔数据的矿体三维形态模拟

Orebody Morphological Modeling from Boreholes

简要介绍了国内外对矿体进行三维建模的主要方法,提出了直接由钻孔数据对矿体进行三维建模及可视化的必要性;论述了基于钻孔数据的三维矿体表面建模的基本原理和流程,提出矿体椭球体参数的获取是矿体形态模拟最重要的步骤;详细讨论了如何从实际的矿体勘查数据出发,分别获取矿段及矿体椭球体参数,使得对矿体形态的模拟融入勘查工程人员对矿体形态的经验认知,更好地模拟矿体形态;通过简单实例,比较了钻孔建模结果与轮廓线建模结果,认为钻孔建模更适合于勘查工程稀疏或者矿体连续性差时的情况,指出了钻孔建模需要改进的方向。

Nowadays,3D geological modeling plays an important role in mine planning.It requires building orebody models directly from borehole data in some cases.This paper first introduces general methods of constructing orebody＇s 3D models and then describes the fundamental principles and workflow of constructing 3D orebody surface models from boreholes.The study shows that the key process of orebody morphological modeling is constructing orebody ellipsoid spheres based on mineral exploring data.Thus,special attention has been given to the way of obtaining mineral segments and parameters of orebody ellipsoid spheres according to exploration data and experiences.This modeling approach can integrate engineers＇ concepts of orebodies morphology.Furthermore,a simple case study of an iron deposit is conducted to model the orebodies directly from the three selected boreholes.The model is also compared with the model that derived from contour-based method.The comparison illustrates that modeling from borehole data is more adapted to than modeling based on contours.Finally,some refinements of the method are discussed in the conclusion.