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Open-pit mining - Extraction | A Wisdom Archive on Open-pit mining - Extraction | | Open-pit mining - Extraction A selection of articles related to Open-pit mining - Extraction | |
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Open-pit mining, Open-pit mining - Extraction, Open-pit mining - Open-pit mines, Open-pit mining - Rehabilitation, Open-pit mining - Typical Open Cut Grades, List of minerals, List of stone, Definition of 'ore', Ore genesis, Mineral resource classification
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ARTICLES RELATED TO Open-pit mining - Extraction | | | |  Open-pit mining - Extraction: Encyclopedia II - Open-pit mining - ExtractionOpen Cut mines are dug on benches, which describe horizontal levels of the mine. These benches are usually on 3 metre or 6 metre levels, depending on the size of the machinery being used. Quarries rarely use benches, as the majority of quarries are dug using (relatively) small-scale machinery.
The walls of the pit are generally dug on an angle less than vertical, to prevent and minimise damage and danger from rock falls. This depends on how weathered the rocks are, and the type of rock, and also how many structural weaknesses occur within the rocks, ...
See also:Open-pit mining, Open-pit mining - Extraction, Open-pit mining - Rehabilitation, Open-pit mining - Typical Open Cut Grades, Open-pit mining - Open-pit mines Read more here: » Open-pit mining: Encyclopedia II - Open-pit mining - Extraction |
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| | | | Open-pit mining - Extraction: Encyclopedia II - Open-pit mining - Typical Open Cut Grades Gold is generally extracted in open cut mines at 1 to 2 ppm (grams per tonne), but in certain cases, 0.75ppm gold is economic. This was achieved by bulk heap leaching at Alkane Minerals Ltd. Peak Hill mine in western New South Wales, near Dubbo.
Nickel, generally as laterite, is extracted via open cut down to 0.2%.
Copper is extracted at grades as low as 0.15% to 0.2%, generally in massive open cut mines in Chile, where the size of the re ...
See also:Open-pit mining, Open-pit mining - Extraction, Open-pit mining - Rehabilitation, Open-pit mining - Typical Open Cut Grades, Open-pit mining - Open-pit mines Read more here: » Open-pit mining: Encyclopedia II - Open-pit mining - Typical Open Cut Grades |
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