process of hard rock mining


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    The resulting process requires much less energy than other hard rock mechanical cutting methods, and will be ideal for use in mining, construction and tunneling, Neilson said. "This is a completely new field of rock breaking technology," Neilson added.


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    There are hard-rock underground mines, and there are soft-rock underground mines. Coal deposits, for instance, live in relatively soft sedimentary rock. Gold deposits live in igneous or metamorphic rock, which is relatively hard, as do diamonds, copper, silver, nickel and zinc [source: Great Mining ...


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    Gold Mining Methods - Ground Truth Trekking. 6 Oct 2010, Today, gold is extracted in hardrock mines that directly mine the source rock, or "lode" of gold, where it was originally deposited by geochemical process Most ore accessed this way today contains only microscopic grains of.


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    The Mining Process. The Mining Process. 1. Mining – open pit and underground. To define the ore from the waste rock, samples are taken and assayed. Assay results are used to mark out areas of ore and waste rock, which are mined separately. Some of the harder areas require blasting to loosen the rock prior to excavation by hydraulic diggers.


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