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

blasting agent

Energy; Coal

A material that is made of a fuel and an oxidizer. It's usually not very sensitive and requires a booster explosive or secondary explosive to ignite it.

acid mine drainage or acid rock drainage

Energy; Coal

Acidic water from metal or coal mines, but also including places where the ground has been disturbed as a result of construction or other means. Water, whether from rain or the location being ...