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

scaling

Mining; Coal

Removing loose rocks from the wall or roof of a mine.

scrubber

Mining; Coal

Devices, also known as gas desulfurization systems, that are used to clean coal and sulfur from objects.

seam

Mining; Coal

A stratum or bed of coal.

secondary roof

Mining; Coal

The roof above the coalbed that will need to be supported during excavation of coal.

self-contained breathing apparatus

Mining; Coal

Also known as SCSR (self-contained self rescuer), it supplies oxygen to a person, for a short period of time 30-60 minutes, in the event of fire within a mine.