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Resolution Copper Mine
Three technical problems complicated development of the mine: depth, rock stress, and heat of up to 170 degrees F. The mine will use a process known as block caving in which rock, broken by gravity, is gathered from underneath through shafts and tunnels.

Three technical problems complicated development of the mine: depth, rock stress, and heat of up to 170 degrees F. The mine will use a process known as block caving in which rock, broken by gravity, is gathered from underneath through shafts and tunnels.