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cost of coal mining process

cost of coal mining process

Due to growth in surfaceminingand improvedminingtechnology, the amountof coalproduced by one miner in one hour has more than tripled since 1978. Surfaceminingis used to produce most of thecoalin the U.S. because it is less expensive than undergroundmining. Surfaceminingcan be used when thecoalis buried less than 200 feet underground.

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