The limitation of geological conditions is important to model a deposit. The geological statistics methods are effective for ore grade estimation and reserve classification.

地质控制条件限制是矿床建模的重要手段， 地质统计学方法是矿块品位估计以及储量分级等的有效方法。

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By using drilling in pit, ore reserve classification is increased, risks of underground mining engineering are reduced and avoided.

主要阐述了矿区通过实施坑内钻探，提高储量级别，降低和避免井下采矿工程风险，节约了成本，增加了效益。

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