as iron, copper, coal and gold. There are several methods of surface mining, including open-pit, stripping, dredging and mountain-top removal. This paper focuses on open-pit surface mining, which involves removing ore from a large hole in the ground (sometimes referred to as a borrow-pit). 1. Burt and Caccetta: Equipment Selection 2 Period 2
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Rock blasting at the large open-pit Twin Creeks gold mine in Nevada, United States. Note the size of the excavators for scale (foreground, left), and that the bottom of the mine is not visible. Note the size of the excavators for scale (foreground, left), and that the bottom of the mine is not visible.
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The deposit is mined using conventional open pit methods. The mining operation is supported by two 34m³ electric cable shovels, three 28m³ electric hydraulic shovels, six drills, a fleet of 36 haul trucks and a number of other ancillary equipment.