一种适于矿体储量计算的矢量栅格混合模型

One Kind of the Vector Grid Hybrid Model Being Suitable for Orebody Reserve Calculation

传统的储量计算方法是在二维图形的基础上,通过几何平均的方法计算完成的。这种计算方式,不但计算繁琐而且计算误差较大。提出一种基于钻孔数据的Section-GTP-Block模型,通过在矿体表面,以剖面(Section)为约束条件构建不规则三角网(TIN),根据穿过矿体的钻孔具有对称性,将TIN中的三角形逐个沿钻孔向下扩展生成GTP。以矿体表面为约束,将矿体模型进行块段剖分,建立了三维栅格数据结构,为矿体内部品位插值提供了方便的工具。该模型自动建模程度高,对矿体储量计算具有很强的实用价值。

The tradition reserves calculation is completed by geometry average method based on two dimensional graph. The calculation process is trivial and the error is serious in this way. This paper introduces the Section-GTP-Block Model that is suitable for orebody reserve calculation based on borehole data. It constructs irregular triangle net （TIN） with constraint of section. It expands each triangle of TIN down into generalized tri-prism along borehole trace according to the symmetrical characteristic of borehole passing through orebody. It generates block model according to generalized tri-prism. Three dimension grid data structure can be setted up after block generation of orebody. It provides convenient implement for interpolation of orebody inside grade. The automatic modeling degree of this model is higher. It is practical for orebody calculation reserve.