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

An extrusive rock similar in composition to a leucitophyre but containing haueyne in place of some of the leucite. Other possible phases include nepheline, augite, magnetite, apatite, melilite, and ...

trachyandesite

Mining; General mining

An extrusive rock, intermediate in composition between trachyte and andesite, with sodic plagioclase, alkali feldspar, and one or more mafic minerals (biotite, amphibole, or pyroxene).

loop drag

Mining; General mining

An eye at the end of a rod through which tow is passed for cleaning boreholes.

nystagmus

Mining; General mining

An eye disease suffered by some miners, in which there is a spasmodic oscillatory movement of the eyeballs; in severe cases, the victim finds difficulty in walking straight. Bad lighting is generally ...

radiophone

Mining; General mining

An FM apparatus, using the mine haulageway trolley wire for power and antenna, that permits the dispatcher to talk back and forth with his motor crews as they are moving throughout the mine. This ...

straight girder support

Mining; General mining

An H-section girder used as a roadway or face beam support. The girder for spanning roadways is commonly 6 in (15.2 cm) deep and 5 in (12.7 cm) in width of flange. It is supported by wood or steel ...

bucket-wheel dredge

Mining; General mining

An hydraulic cutter dredge that uses a bucket wheel excavator in place of the traditional rotary cutter. The bucket wheel is characterized by its high cutting torque in both directions and by a ...