coal mining

(redirected from Mining coal)
Also found in: Dictionary.
Related to Mining coal: colliery, Underground coal mining

coal mining,

physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Strip mining is the process in which the overburden (earth and rock material overlying the coal) is removed to expose a coal seam or coal bed. Excavators either dispose of the overburden or store the waste material for replacement after the coal has been extracted. Once exposed, the coal is usually removed in a separate operation. Surface soil is often stripped separately and spread back onto the reclaimed surface. The environment can also be protected by seeding or planting grass or trees on the fertilized restored surface of a strip mine. The term strip mining is most often used in reference to coal mining, although the process may also be used to extract certain metallic ores as well. Sometimes the terms open-pit, open-cast, or surface mining are used in the same sense, although they usually refer to metalliferous mining or the mining of other minerals. Underground coal mining is the extraction of coal from below the surface of the earth. The coal is worked through tunnels, passages, and openings that are connected to the surface for the purpose of the removal of the coal. Mechanical equipment breaks the coal to a size suitable for haulage. Alternatively, the coal is drilled, and the resultant holes are loaded with explosives and blasted in order to break the coal to the desired size. In order to protect the miners and equipment in an underground coal mine, much attention is paid to maintaining and supporting a safe roof or overhead ceiling for the extraction openings. Long-wall mining is a method of underground mining believed to have been developed in Shropshire, England, near the end of the 17th cent. A long face, or working section, of coal, some 600 ft (180 m) in length, is operated at one time. The miners and machinery at the working face are usually protected by hydraulic jacks or mechanical props which are advanced as the coal is extracted. The excavated, or gob, area is either allowed to cave in, or is filled in by waste material called stowing. The Anderton shearer is a widely used coal cutter and loader for long-wall mining. It shears coal from the face as it moves in one direction and loads coal onto an armored conveyor as it travels back in the opposite direction. It is ordinarily used for coal seams greater than 3.5 ft (9.1 cm) in thickness.

coal mining

[′kōl ‚mīn·iŋ]
(mining engineering)
The technical and mechanical job of removing coal from the earth and preparing it for market.
References in periodicals archive ?
Hopefully, they can resolve this problem and get back to mining coal. This is a moment for the union miner to shine and a chance for both groups to prove wrong those who saw the situation as destined to fail.
The action plan counts on Upper Nitra to transform by 2023, the year when the so-called general economic interest in mining coal for electricity production expires, SITA wrote.The mining is supported with the fees of all electricity consumers through monthly bills, with altogeher Pound 115 million a year, the newswire noted.
According to SECMC's Chief Operating Officer Syed Abul Fazal Rizvi, SECMC, the firm mining coal at Thar Coal Field's Block II, which successfully completed a pilot project of biosaline agriculture by growing crops on underground water, has also attained the success of marketable fish farming on the brine being extracted from the Coal Field's 2nd and 3rd aquifers.
Solid-Gas Coupling Mathematical Model of Mining Coal Deformation and Pressure Relief Gas Flow.
Last month, President Trump signed an order rolling back a temporary ban on mining coal and a stream protection rule imposed by the Obama administration.
Part 6 - Provision of heavy equipment for the needs of SRK SA Branch in Dabrowa Mining Coal Mines in complete liquidation.
"Despite trends in the coal industry, as long as one person is mining coal in Virginia, these teams must be prepared for any emergency," DMME Mine Chief Randy Moore said.
Chinedu Nebo, and his Mines and Steel Development counterpart, Alhaji Mohammed Musa Sada, told journalists at the end of the meeting that the federal government was not happy at the way many of the over 12 coal bloc awardees have held onto the licences like land speculators instead of mining coal or relinquishing the licences to more serious explorers.
Brophy likes to quote mine founder Joe Usibelli about the challenges of mining coal: "Mining coal is easy.
US China Mining Group Incorporated (OTC Bulletin Board: SGZH), a company engaged in coal production and sales by exploring, assembling, assessing, permitting, developing and mining coal properties in the People's Republic of China, has completed a private placement financing.
The ratings also incorporate the company's experience in mining coal blocks and its high operating margins of between 20% and 30%.
I was intrigued to see your cover story on mining coal ("Ready to Rumble," Summer).

Full browser ?