coal mining

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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 ?
The safety and health of workers in coal mine are indispensable and important issues, the accidents and diseases affecting coal mine workers however, it requires a good understanding and better data regarding dangerous or hazards at work environment.
Dukki SHO Ibrar Hussain told The Express Tribune that the coal mine collapsed when miners were digging 1,700 feet deep inside it.
He had urged the governments to take the issue more seriously and make efforts to implement the law for overcoming coal mine incidents.
About 200 miners die and hundreds of others are injured in accidents in coal mines in Balochistan every year, according to the Pakistan Central Mines Labour Federation.
At last he concluded his remarks, that Thar coal mine Is a great asset in the hand s of Pakistan which can solution to as many issues and lower down electricity downfall in country.
The report shows that the socioeconomic impacts of coal mine closures are significant, with some coal-dependent regions continuing to lag socially and economically.
The workers at the Fengchun coal mine under the Chongqing
According to China's National Coal Mine Safety Administration, the country saw 375 coal mining related deaths in 2017, down 28.7 percent year-on-year.
Shumba Energy country manager, Mr Comfort Molosiwa said in an interview after a kgotla meeting addressed by Shumba Energy that the company proposed to open a new coal mine around Palapye.
Thiess has been the sole mining contractor of the Senakin Coal Mine since 2000 and the extension involves mining 5 million tonnes of coal and 52 million bank cubic meters (bcm) of overburden.
29 (ANI): Madhya Pradesh Chief Minister Shivraj Singh Chouhan stated that the dysfunctional coal mines in Chhindwara area would soon be reopened.
The allocattee is required to comply with all applicable Laws and observe Good Industry Practice for the protection of the general health, safety, welfare, social security and minimum wages of employees engaged at the Coal Mine, including employees of any contractor or sub-contractor and of all other persons having legal access to the area covered by the Agreement.