Coal

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

miner

Mining; Coal

A person who works or is in the business of extracting natural materials from the earth, mainly, coal, ore and other precious substances.

mineral

Mining; Coal

An inorganic compound that is naturally occurring in the earth and has a definite chemical composition and a specific set of characteristics.

misfire

Mining; Coal

When a charge fails to detonate partially or completely.

msha

Mining; Coal

Mine, Safety and Health Administration, under the United States Department of Health, is tasked with regulation of mine safety with the goal of reducing hazards and increasing safety.