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

barren

Energy; Coal

Referring to an area that has no or very little of desired material for mining.

barricading

Energy; Coal

In mining, it's the process by which a wall is created, or left intact, to protect sections of the mine from gas, fire and explosions.

bed

Energy; Coal

An area or stratum of sedimentary deposits.

belt conveyor

Energy; Coal

A mechanical device on which a looped belt carries materials through or out of the mine.

beneficiation

Energy; Coal

The process by which mined material is separated from waste through treatment.

berm

Energy; Coal

A small hill or mound of material, can refer to the waste material, if in a pile, after digging a large hole.

bituminous coal

Energy; Coal

A soft coal that is considered better than lignite but worst than anthracite. It's about 60-80% carbon with the rest being water, air, hydrogen, and sulfur.