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What Are The Disadvantages Of Mining Copper

Apr 27 2015 · The many advantages of underground mining It is several percentages higher from its earlier prediction which was only 11 years Underground production is estimated to be 441 million tons of ore averaging 055 percent nickel and 016 percent copper Enhancing its opencast operations with an underground mining could potentially increase the KunManie mine site by at least 19 percent

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