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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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| Because of local concerns, general practitioner consultation rates in children living in communities close to and away from open-cast mines were compared. A spokesman for a local heating company says it has enough coal left for a day-and-a-half and that supplies are slow in coming because of temperatures as low as minus 50 centigrade (minus 58 Fahrenheit) at the open-cast mine the fuel comes from. Non-metallic rock materials for construction are obtained as a result of mechanical processing of igneous rock, sedimentary, metamorphic rock mined in open-cast mines (quarries). |
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