800TPH room and pillar mining method
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800TPH room and pillar mining method

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800TPH room and pillar mining method

86 3-15 Underground Mining 89 3-16 Plan View of Longwall Mining 90 ... The will recover approximately 50 percent of the coal. ... ea 1,300 TPH 1,300 TPH 7 TPH ea ea 1,500 TPH 500 gpm ea 180 f2, ...

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