Mineral mining

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

Working cycle

Mining; General mining

A complete set of operations. In excavation, it usually includes breaking, loading, moving, dumping, and returning to the loading point.

Air sollar

Mining; General mining

A compartment or passageway carried beneath the floor of a heading or of an excavation in a coal mine for ventilation.

Fabric element

Mining; General mining

A component of a rock fabric that acts as a unit in response to deformative forces.

Variation compass

Mining; General mining

A compass of delicate construction for observing the variation of the magnetic needle.

Espley rock

Mining; General mining

A conglomerate or breccia with rapid lateral passage through grit to fine sandstone; cement usually ferruginous with some lime and alumina. Characteristically developed amid variegated clays of ...

Tepee butte

Mining; General mining

A conical hill or knoll resembling a Native American tepee; esp. an isolated, residual hill formed by a capping of resistant rock that protects the underlying softer material from erosion. Also ...

Callow cone

Mining; General mining

A conical free-settling tank. Pulp is fed centrally; the finer solid fraction overflows peripherally, and the coarser fraction is withdrawn at a controlled rate via the apex at the cone's bottom.