Project Overview: The George Fisher Mine, an underground zinc/lead mine located about 20 kilome- tres north of Mount Isa in north-west Queensland. To increase production from 3.5Mtpa to 4.5Mtpa increase, a new materials handling system was installed at the north end of the mine. This included underground crushing, conveying and storage, L72 hoisting shaft, surface conveying and a sur- face crushing facility (SCF). The SCF is also require

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