The selection of mining method is an uncertain multi attribute decision making problem. The uncertainty of mining index can be described with interval Numbers.

采矿方案选择是一个不确定多属性决策问题，提出用区间数来描述采矿指标的不确定性。

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Unlike other indexes such as the NYSE Arca Gold Mining Index, which actually includes several silver miners, over 95% of the revenues from the companies in the Solactive Index are derived from gold mining.

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The Metals Channel Global Mining Titans Index is comprised of the top fifty global leaders from the metals and mining sector.

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Mining stocks are especially hot right now with the Metals and Mining sub-index ahead almost 18% for October.

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