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The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest environmental liability of the mining industry". [4] These tailings contain large amounts of pyrite (FeS 2) and Iron(II) sulfide (FeS), which are rejected from the sought-after ores of copper and nickel, as well as coal.
Coal waste in Pennsylvania. Coal refuse (also described as coal waste, rock, slag, coal tailings, waste material, rock bank, culm, boney, or gob [1]) is the material left over from coal mining, usually as tailings piles or spoil tips.
Coal refuse (also described as coal waste, rock, slag, coal tailings, waste material, rock bank, culm, boney, or gob [23]) is the material left over from coal mining, usually as tailings piles or spoil tips.
Tailings piles or ponds, mine waste rock dumps, [3] and coal spoils are also an important source of acid mine drainage. After being exposed to air and water, oxidation of metal sulfides (often pyrite , which is iron-sulfide) within the surrounding rock and overburden generates acidity.
Athabasca River. On October 31, 2013, a waste pit at the Obed Mountain Mine failed near the town of Hinton in Alberta, Canada.Following the collapse of a tailings dam, up to 1 billion litres (260 million US gallons) of wastewater flooded into the nearby Athabasca River in what may have been the largest coal slurry spill in Canadian history.
Botayama (spoil tip) in Iizuka City, Japan, in the 1950s Spoil pile in Northumberland County, Pennsylvania Spoil tip at Jägersfreude, Saarbrücken . A spoil tip (also called a boney pile, [1] culm bank, gob pile, waste tip [2] or bing) [3] is a pile built of accumulated spoil – waste material removed during mining. [4]
The collapse of an 11-story coal mining plant in Martin County left two workers trapped under the rubble as crews worked to free them Wednesday. One of the workers has since been confirmed dead.
Certej Mine, Romania 89 A tailings dam built too tall collapsed, flooding Certeju de Sus with toxic tailings. [26] Buffalo Creek Flood: 26 February 1972 West Virginia, United States 125 Unstable loose constructed dam created by local coal mining company, collapsed in heavy rain. 1,121 injured, 507 houses destroyed, over 4,000 left homeless.