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

lock sill

Mining; General mining

A raised portion of the floor of a lock chamber, forming a stop against which the lock gates bear when they are shut.

brush rake

Mining; General mining

A rake blade having a high top and light construction.

pneumatic ram

Mining; General mining

A ram fed by a compressed-air pipeline. The piston is about 8 in (20 cm) in diameter, giving an area of 50 in 2 (323 cm 2 ) and exerts a pushing force of up to 4,000 lb (1,800 kg).

wold

Mining; General mining

A range of hills produced by differential erosion from inclined sedimentary rocks; a cuesta. Compare: cuesta

Anbauhobel

Mining; General mining

A rapid plow for use on longwall faces. It is suitable for seams from 2 to 8 ft (0.6 to 3.9 m) thick, with reasonably good roof and floor. The plow travels along the face at a speed of 75 ft/min ...

A rapid tunneling procedure, consisting of a combined drill carriage and manifold for water and air so that immediately when the carriage is at the face, drilling may commence with no lost time for ...