Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

Contributors in Mineral mining

Mineral mining

A term applied to any cutter loader that can cut both ways on a longwall face without turning at each end. This requires cutting units at both ends of the machine and duplication of other essential ...

pelagochthonous

Mining; General mining

A term applied to coal deposits formed from submerged forests and driftwood.

incomplete combustion

Mining; General mining

A term applied to combustion in which all of the fuel is not burned; e.g., leaving unburned carbon in ashes. Compare: imperfect combustion

hydromechanization

Mining; General mining

A term applied to hydraulic methods of excavating and transporting coal and other products underground.

azure stone

Mining; General mining

A term applied to lapis lazuli (lazurite) and to other blue minerals such as lazulite and azurite.

self-annealing

Mining; General mining

A term applied to metals, such as lead, tin, and zinc, that recrystallize at air temperature and in which little strain hardening is produced by cold working.

welded dike

Mining; General mining

A term applied to pegmatitic and aplitic dikes, the boundaries of which have been obliterated by continued growth of the minerals of the granite into which the dikes have been injected.