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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >A test of the appropriateness of the LUC technique in high-nugget Birimian-style gold deposits
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A test of the appropriateness of the LUC technique in high-nugget Birimian-style gold deposits

机译：LUC技术在高块金Birimian型金矿中的适用性测试

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The localized uniform conditioning (LUC) technique was proposed by Marat Abzalov in 2006. The technique converts conventional uniform conditioning (UC) grade-tonnage curves into single grade values attached to each smallest mining unit (SMU). This is achieved by ranking the SMUs within a panel in increasing order of their grade (based on the direct kriging of SMUs). This ranking is then used to localize the conventional UC grade-tonnage curves for each panel by dividing them into classes and computing their mean grades, which are assigned to the SMUs. The quality of this localization process will depend heavily on the validity of the grade patterns predicted by the direct kriging of the SMUs. Abzalov noted that where the distribution of data available for the direct kriging of the SMU is characterized by strong short-range variability, the advantages of using the LUC approach may be more limited. Consequently, a study was undertaken to determine how valid the predicted grade patterns of a typical Birimian-style gold deposit (with high nugget effect and strong short-range variability) might be expected to be. This was determined by comparing the direct SMU kriging ranking (based on sparse data) with the grade control model ranking (based on close-spaced data and the best available estimate of the deposit). The results showed a satisfactory correlation between these rankings and it was concluded that, although the grade patterns predicted by the direct kriging of the SMUs may be less meaningful for deposits exhibiting strong short-range continuity, there is nevertheless a convincing relationship with the actual (or best available) rankings. Therefore, the LUC technique is still considered to be useful for this style of deposit.
机译：局部均匀条件（LUC）技术是Marat Abzalov在2006年提出的。该技术将常规均匀条件（UC）等级-吨位曲线转换为附加到每个最小采矿单位（SMU）的单一等级值。通过将SMU按其等级的升序排序（基于SMU的直接克里金法），可以实现此目的。然后，通过将该等级划分为各个类别并计算其平均等级，将其用于定位每个面板的常规UC等级-吨位曲线，然后将其平均等级分配给SMU。这种本地化过程的质量将在很大程度上取决于由SMU直接克里金法预测的等级模式的有效性。阿布扎洛夫（Abzalov）指出，在SMU直接克里金可用的数据分布以短距离可变性为特征的情况下，使用LUC方法的优势可能更加有限。因此，进行了一项研究，以确定预期的典型Birimian型金矿（具有高的金块效应和强的短程可变性）的预测品位模式如何有效。这是通过将直接SMU克里金法排名（基于稀疏数据）与坡度控制模型排名（基于近距离数据和最佳的矿床估算）进行比较来确定的。结果表明，这些评级之间具有令人满意的相关性，并且得出结论，尽管通过SMU的直接克里金法预测的品位模式对于表现出短时连续性的矿床可能没有多大意义，但是与实际（或最佳可用）排名。因此，LUC技术仍被认为对这种沉积方式有用。

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