open-pit mining

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open-pit mining

[¦ō·pən ¦pit ′mīn·iŋ]
(mining engineering)
Extracting metal ores and minerals that lie near the surface by removing the overlying material and breaking and loading the ore. Also known as open-cast mining; opencut mining.
References in periodicals archive ?
Open-cut mining and coal combustion for power generation in the Upper Hunter compete for resources with long-standing rural production, which depends on good water supplies and access to alluvial soils.
The Thaduna mine was discovered by prospectors in 1941, and small-scale production continued until 1953, followed by open-cut mining and trial underground mining intermittently from 1955 to 1971.
Maules Creek is located in New South Wales With 356mt JORC Reserves, capable of supporting a large-scale open-cut mining operation for more than 30 years.
Mining at Tropicana is based on conventional drill-and-blast, truck-and-excavator, open-cut mining methods carried out by mining contractor Macmahon Holdings.
Tumas Zones 1 and 2 resources were estimated by Multiple Indicator Kriging (MIK) with block support correction, and reflect open-cut mining selectivity.
The full scope of Leighton's Solomon Hub contract now includes operating and maintaining the open-cut mining fleets, mine planning, ore quality control, ore processing facilities, and associated infrastructure, such as the airport and village.
"With expected capital costs of around A$350 million for open-cut mining, which includes beneficiation plants and ship loading facilities; and total cash operating costs (including royalties) of around A$37/tonne on-ship, it is expected that a final product of 66% iron concentrate will produce tremendous profits and cash-flow for Pluton for many years forward." he said.