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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
Average mine price
Energy; Coal
The ratio of the total value of the coal produced at the mine to the total production tonnage.
Drilling arrangement
Energy; Coal
A contractual agreement under which a working interest owner (assignor) assigns a part of a working interest in a property to another party (the assignee) in exchange for which the assignee agrees to ...
Coal stocks
Energy; Coal
Coal quantities that are held in storage for future use and disposition. Note: When coal data are collected for a particular reporting period (month, quarter, or year), coal stocks are commonly ...
Average production per miner per day
Energy; Coal
The product of the average production per miner per hour at a mining operation and the average length of a production shift at the operation.
Cogeneration
Energy; Coal
The production of electrical energy and another form of useful energy (such as heat or steam) through the sequential use of energy.
Dry (coal) basis
Energy; Coal
Coal quality data calculated to at heoretical basis in which no moisture is associated with the sample.This basis is determined by measuring the weight loss of a sample when its inherent moisture is ...
