22 Terms
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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
Chalmersite
Mining; General mining
A former name for cubanite, an orthorhombic mineral, CuFe 2 S 3 ; dimorphous with isocubanite. Formerly called chalmersite.
Chalcopyrrhotite
Mining; General mining
A former name for cubanite, an orthorhombic mineral, CuFe 2 S 3 ; dimorphous with isocubanite.
Dennisonite
Mining; General mining
A former name for davisonite, a mixture of crandallite and an apatite.
Ball bearing
Mining; General mining
A friction-reducing device consisting of hard steel balls in a circular race; also applied to some pieces of equipment, such as a swivel-type double-tube core barrel, in diamond drilling using ball ...
Pushbutton coal mining
Mining; General mining
A fully automatic and remotely controlled system of coal cutting, loading, and face conveying, including self-advancing roof support systems.
Exponential model
Mining; General mining
A function frequently used when fitting mathematical models to experimental variograms, often in combination with a nugget model.
