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    Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals such as those containing metals like gold, copper, zinc, nickel and lead or gems such as diamonds

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    Gold mining is the resource extraction of gold by mining These operations typically include diesel powered, Hard rock gold mining extracts gold encased in

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    Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals such as those containing metals like gold, copper, zinc, nickel and lead or gems such as diamonds

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