Feb 25, 2018 ... Mineral Processing & Metallurgy ... These images are from the largest open pit gold mine in Australia. ... The hanging wall is the underside of the wall rock overlying an ore body. ... it becomes easy to think that it's not practical to excavate or to work with machinery and equipment on sloping surfaces. surface...
The use of heavy machinery, usually bulldozers and dump trucks, is the most ... Because open pit mining is employed for ore deposits at a substantial depth ... and dump trucks, which transport the ore to processing facilities using haul roads.
Particularly in open pit mines, economies of scale have been achieved mainly by increasing productivity ..... This increases the ore size reduction ratio in the milling process, which increases one of the most costly operations in processing. 4.
Open pit, open cast or open cut mining is a surface mining technique of extracting rock or ... Open pit mines are used when deposits of commercially useful ore or rocks are found near the surface; that is, ... These benches are usually on four to sixty metre intervals, depending on the size of the machinery that is being used.