可视化仿真中某低铝硅比薄矿体动态储量计算

 运用Dimine数字矿山软件系统对重庆铝土矿灰河采区建立钻孔数据库，进行原始样品统计分析及空间数据的变异函数分析，阐述了估值方法的选择原则。分别采用距离幂次反比法和传统方法对示例矿体的有用化学组分进行品位推估，将距离幂次反比法估值后的块段模型分别按组分A/S、Al2O3品级及中段高度进行区间显示和储量统计。另外，对不同估值方法的储量计算结果进行对比分析，并做了较为严格的精度检验。实践表明，该采区内样品之间有相关性，并不完全随机，但3个方向的变异性并不明显；有用矿物成分呈层状、似层状，平面形态表现为区域性富集，不同品级间的界限较为明确；A/S和Al2O3的平均品位值基本随中段高度的增加而呈平稳上升趋势，储量的峰值出现在灰河采区中部900m附近；各估值方法所得储量与初步设计时统计的储量存在不同程度的偏离，并指出传统方法（尤其是块段法）较为适合该采区矿体（矿体薄）的品位推估和储量计算，为矿山进行资源评估和合理规划设计及生产提供了理论依据。

Dynamic Reserve Calculation of a Low Alumina-Silica Ratio Thin Orebody via Visual Simulation

The advanced Dimine digital mine software system was used to set up a bauxite mining database of the Huihe mining district in Chongqing. A statistical analysis of a number of original samples and a variation functional analysis of spatial data were made for use with a selection principle based estimation method. The distance-power-inverse-ratio method and traditional methods were adopted for grade estimation of useful chemical components in an orebody. Then, the estimated block modes were displayed separately according to respective grade level of A/S, Al2O3, and reserve statistics were completed using the sublevel data. In addition, the authors conducted a comparative analysis for reserve calculations results based on the different estimation methods, and developed an accuracy test. The study found that there is a correlation among the samples of the mining district, and the content is not completely random, but the directional variability is not apparent from the three-direction study. Useful mineral compositions occur in layered, stratiform-like, and plane configurations manifest as regional enrichment, and the boundaries between different grades are very clear. The average grade of A/S and Al2O3 exhibits a steady rising trend as the sublevel height increases. Meanwhile, the peak value of the reserve appears in the middle of Huihe mining district, near 900m. However, there are different degrees of reserves predicted using various estimation methods and statistical analysis of data, which was obtained from preliminary designs. This investigation indicates traditional methods (the block method, in particular) more suitable for grade estimation and reserve calculation of orebodies in this mining district (thin orebody). Its results provide a theoretical basis for carrying out stock assessments, making reasonable mining designs, and production plan.