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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.
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.
Term for the pit head, where coal was sorted from dirt before washing. [6] Shaft. A shaft is a vertical or near-vertical tunnel that gives access to a coal mine accommodating the cage and providing ventilation. Shotfirer. A shotfirer is a colliery underofficial qualified to detonate shots or explosive charges. [6]
Mining is documented in the "e-maden" computer system ("maden" means "mine" in Turkish). [109] Coal miners do not have the right to strike. [110] A company called Tarhan Maden has proposed a mine in the district of Tavşanlı in Kütahya Province. [111] Unions have complained of mines they say are unsafe, such as Kınık coal mine. [112]
Most commonly the term is used for the piles of waste earth materials removed during an excavation process. In surface mining (commonly called strip mining) for coal or other underground deposits, earth materials removed to expose the targeted deposit are piled up alongside the excavation site (commonly a strip mining pit) in spoil banks.
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.
Maskot/Getty Images. 6. Delulu. Short for ‘delusional,’ this word is all about living in a world of pure imagination (and only slightly detached from reality).
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.