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强烈偏倚的品位分布和要求在选别开采条件下估算局部可回收储量,是普通克里格法(OK)不能轻易处理的两个问题。利用新近引入的具有非参数和元分布特征的指标克里格法(IK),上述问题就可得到解决。本文描述了对指标克里格法在一个露天开采的金-银矿床上应用效果的评价结果。为了作效果评价,把指标克里格法预测的局部可回收储量与依据炮孔资料求得的真实储量作了对比。指标克里格法估计量虽然略偏乐观(或估计过高,但在预测一个试验台阶中各盘区总的可回收全盘司数时却表现很好。我们也采用了普通克里格法(OK)来试图预测局部可回收储量,此时是根据每个盘区的平均品位来把它处理为矿石或废石。在实行这种准则的情况下,可以看出普通克里格法具有相当大的偏差,并偏于悲观(或估计过低)。
Strongly biased grade distributions and the requirement to estimate the local recoverable reserves under sectoral mining conditions are two issues that the ordinary kriging (OK) can not easily handle. The above problem can be solved by using the newly introduced kriging method (IK) with non-parametric and elemental distribution features. This paper describes the evaluation of the application of the indicator kriging method in an open pit gold-silver deposit. For the purpose of effectiveness evaluation, the local recoverable reserves predicted by the indicator kriging method are compared with the actual reserves obtained from the borehole data. Indicators Although the kriging estimates are slightly optimistic (or overestimated), they perform well when predicting the total recoverable total division of each panel in a test run. We also use the common kriging ( OK) to try to predict the local recoverable reserves, this time is based on the average grade of each panel to treat it as ore or waste rock in the implementation of this criterion, we can see that ordinary Kriging has a considerable Big deviation, and partial to pessimistic (or underestimated).