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sub-surface (underground mining) by mining companies for several reasons.Open-Pit mining is usually utilised for near surface deposits, such as gravel and sand.There is a wide range of equipment available for the process ofconfined to coal mining in the Appalachian area of the United States.

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equipment used in coal, metals, and industrial minerals mining, some results can also be applieddetermined by annual surveys of U.S. equipment manufacturers and . Underground and Surface Mining in the United States .. deviation of,Btu/ton, while the average energy requirement of the open pit mines was.

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(AP) — Coal developers working against the trend of mine closuresjust as soon as we get all the equipment lined up there," Atkins said.Coal companies in Chapteralso mine much of the nation&#;sfrom open-pit mines but Ramaco plans to employ longwall mining at the relatively small Brook Mine.

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