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    The mineshafts and drifts were then “mucked out” and the gold-bearing ore was transported to the surface for processing. To access the gold, the ore had to be crushed. The first crushing equipment was the Mexican arrastra, a dev that ground the ore

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    Similarly, in surface mines the down-hole analysis of ore in blast holes could lead to more efficient materials handling by identifying ore and waste constituents. Equally important to improving the performance of materials-handling machinery will be the development of new technologies for monitoring equipment

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    in metal ore extraction was mainly isolated to Chile and Australia. In Chile, copper ore extraction grew from 70 million tonnes (Mt) in the early 1980s to well over 500 Mt by 2008. In Australia metal ore extraction grew from under 200 Mt to over 600 Mt during the same period, with the extraction of iron ore