Crushing The Gold Underground

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The first use of machinery in the gold rush was in the 1860s at an underground mine in Tangier The machine, called an arrastre, used a giant stone attached to a wooden arm to crush the gold-bearing rock

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Methods used in Crushing & Screening Plants on ore range from a simple combination of a grizzly and one crusher to an elaborate arrangement in series of grizzly, jaw crusher…

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Underground mining (hard rock) - Wikipedia Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as

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The operation is situated in the area of the historic Detour Lake open pit/underground mine operated by Placer Dome which produced 18 million ounces of gold from 1983 to 1999 Detour Gold acquired the property in January 2007, completed a feasibility study in June 2010 and commenced gold production in …

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Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for …

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Rock Crushing Equipment Crushing The size requirement of the primary crusher is a function of grizzly openings, ore chute configuration, required throughput, ore moisture, and other factors

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In some cases the underground primary crusher feeds an inclined conveyor belt which delivers ore via an incline shaft direct to the surface The ore is fed down ore passes, with mining equipment accessing the ore body via a decline from surface Deepest mines

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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 Dump trucks haul the rock to the primary crushers in the open pit or to the ore stockpiles from underground See more detail on mining 2 Crushing

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Crusher A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different

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Rock Crushing Equipment Crushing The size requirement of the primary crusher is a function of grizzly openings, ore chute configuration, required throughput, ore moisture, and other factors