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economies of scale in gold mining in Africa It uses mine level data between 2005 and within a small number of larger firms A large part of these concentrations have been driven by 3 An open pit mine is the type of mining where the surface ground is removed in a large pit to extract the mineral as

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Dec 21 2015· Blasting equipment is used for both underground and open pit mining operations and is known to be one of the most hazardous aspects of the job For mining operations to be successful good blast designs are absolutely vital as poor practices and excessive explosives can result in damage to rock structures causing unwanted caving Earth Movers

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The Palabora Open Pit mechanically excavated by Palabora Mining Company in Phalaborwa Limpopo Province The pit is 898m deep and 1846m across on top Voorspoed diamond mine Spain Corta Atalaya the largest open-pit mine in Europe and was at one time the largest in the world Sierra Menera Sistema Ibérico