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Pollution. Environmental impact of mining can occur at local, regional, and global scales through direct and indirect mining practices. Mining can cause erosion, sinkholes, loss of biodiversity, or the contamination of soil, groundwater, and surface water by chemicals emitted from mining processes. These processes also affect the atmosphere ...
Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, [1] is a surface mining technique that extracts rock or minerals from the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin. In contrast, deeper mineral ...
[3] [4] The impact of sub-surface mining on the surroundings will be less than for open pit mines. However, sub-surface mining may also cause subsidence of the surface due to the collapse of mined-out area and abandoned stone drifts. [3] Disposal of mining wastes, spent oil shale (including semi-coke) and combustion ashes needs additional land ...
The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...
Open-pit mining disturbs larger areas than underground mining making the visual impacts much greater. [13] In addition, the amount of waste rock produced in open pit mines is typically two to three times the amount of ore produced meaning massive amounts of waste rock are removed from the pits and deposited in nearby areas. [13]
The Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals, [3] is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, in the Oquirrh Mountains. The mine is the largest human-made excavation, and deepest open-pit mine in the world, [4][5] which is considered to have ...
Pebble Mine. Pebble Mine is the common name of a proposed copper -gold- molybdenum mining project in the Bristol Bay region of Southwest Alaska, near Lake Iliamna and Lake Clark. [1] It was discovered in 1987, optioned by Northern Dynasty Minerals in 2001, explored in 2002, and drilled from 2002-2013 with discovery in 2005.
Nchanga Copper mine is a cobalt and copper producing mine in Chingola, in the Copperbelt Province of Zambia. [2] It is owned by Konkola Copper Mines, a joint venture between the British [3] Vedanta Resources and the state mining company of Zambia. [4][5] The mine is the largest copper mine in Africa. Operations take place both in an open-pit ...