对数Kriging在矿体储量计算中的应用

Application of Logarithm Kriging in Orebody Reserve Calculation

目前,在实际生产单位所采用的储量计算方法主要是基于立体几何的传统方法,即剖面法或地质块段法。但由于各种原因,特别是随着生产的不断进行以及对客观地质体复杂性的认识深化,原地质勘探储量和边界与矿山开采储量和边界往往存在一定差距,这给矿山建设和生产带来很大影响。准确估计矿体品位空间分布规律和总体储量有利于提高矿山生产效率,降低生产成本。采用对数Kriging和距离反比法对个旧锡矿芦塘坝10-9号矿体进行储量计算,其结果分别与地质块段法计算的储量进行了对比,并探讨了前两种计算方法的影响因素及其产生误差的根本原因。

The reserve calculation methods used in the production units at present are mainly the traditional ones based on solid geometry, namely cross-section method or geological block method. But due to various causes, especially with the production continuously going on and the deepening of the knowledge of the complexity of the objective geological body, there are often certain differences between the original reserve and cut-off grade determined by the geological prospecting and those found in the mine production, which can bring great effect on the mine construction and production. Accurate estimation of the space distribution law of orebody＇s grade and the total reserve can benefit the improvement of mine production deficiency and the reduction of production cost. Logarithm Kriging and inverse distance method are used in the study of No. 10-90rebody of Lutangba in Gejiu Tin Mine, and the result is compared with the reserve calculated by geological block method. The influencing factors of the two methods and the radical cause for the error are discussed in the paper.