Open pit machinery can also be used for other purposes such as civil construction, whereas underground mining equipment is specialized and expensive. A number of surface mines operate 24 hours/da y and almost 365 days/year in order to use open pit machinery for as many hours as possible, thereby reducing the number of machines required.
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however, for large scale open pit mining in particular, the 92;truck and loaderquot; material movement practice is the preferred method of materials handling . Throughout this paper, we consider a 92;loaderquot; to be any type of high productivity excavating equipment, which may include a mining loader, shovel or excavator.
Open pit mines that produce building materials and dimension stone are commonly referred to as quot; quarries.quot; Open pit mines are typically enlarged until either the mineral resource is exhausted, or an increasing ratio of overburden to ore makes further mining uneconomic.
Open pit mining equipment Open pit mining is an industrial activity that involves the removal of large quantities of soil and subsoil, which is then processed to extract the mineral. This mineral may be present in very low concentrations, in relation to the amount of material removed.
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