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open-pit mining |
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open-pit mining [¦ō·pən ¦pit ′mīn·iŋ] (mining engineering) Extracting metal ores and minerals that lie near the surface by removing the overlying material and breaking and loading the ore. Also known as open-cast mining; opencut mining. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Pierce Carson, CEO, stated, "Based on our review to date, we have concluded that the Carache Canyon and Lucas Canyon deposits have promising open-cut mining potential at current gold prices and at assumed current-day capital and operating costs. 057 opt gold (open-cut) Capital cost (before contingencies): $69 million Capital cost contingencies: $21 million Milling rate: 1,850 tons/day Mill recovery: 85% Underground mining cost: $26/ton Open-cut mining cost: $22/ton (includes overburden stripping) Milling cost: $14/ton Cash operating costs: $134/ounce The Feasibility Study was based on open-cut mining to a depth of 50 m of a drill-indicated resource of 325,000 tonnes grading 13. |
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