• Cementation

    Raise Boring. Cementation introduced large diameter hard rock raise boring into Canada at Goldcorp's Red Lake Gold Mines. This bored shaft was

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  • Raise borer - Wikipedia

    A raise borer is a machine used in underground mining, to excavate a circular hole between two levels of a mine without the use of explosives.. Th

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  • straight up - REDPATH MINING

    boxhole borer and some prototype downhole raise borers that use water for flushing and conveying the cut material out of the borehole. shaft sinking Blind

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