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Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Industry: Energy
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Coal
longwall mining
Mining; Coal
A technique in underground mining where a long face of coal is mined in a single slice roughly 1-2 m thick, 3-4 km long, and 250-400 m wide. The mined coal falls onto conveyers at the base of the ...
methane monitor
Mining; Coal
A device that measures and monitors the amount of methane gas in an area.
mine development
Mining; Coal
Preparing a mine for ore extraction, such as tunneling, raising and crosscutting.
mine mouth electric plant
Mining; Coal
An electric plant that uses coal and is located near a coal mine.
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