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In mining, tailings or tails are the materials left over after the process of separating the valuable fraction from the uneconomic fraction of an ore.Tailings are different from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.
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.
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]
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.
A tailings dam is typically an earth-fill embankment dam used to store byproducts of mining operations after separating the ore from the gangue. Tailings can be liquid, solid, or a slurry of fine particles, and are usually highly toxic and potentially radioactive. Solid tailings are often used as part of the structure itself.
A sough is a drainage tunnel to take water from coal mines without the need to pump it to the surface. [1] An example is the Great Haigh Sough. Spoil tip. Gin Pit Colliery's old spoil tip or rucks A spoil tip is a pile built of accumulated spoil - the overburden or other waste rock removed during coal and ore mining. Squeeze
Overburden at a coal mining site. In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body.