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 bituminous pavement that is mixed and laid at relatively high temperatures, generally above 250 degrees F (121 degrees C). The highest type pavement that can be laid, it has greater durability and ...

Sinter bit

Mining; General mining

A bit, the crown of which is formed by applying heat and pressure to a mixture of powdered metals covering diamonds set inside a mould or die-shaped to the form of a bit crown. The bit crown thus ...

Noncoking coal

Mining; General mining

A bituminous coal that burns freely without softening or any appearance of incipient fusion. The percentage of volatile matter may be the same as for coking coal, but the residue is not a true coke.

Semiround nose

Mining; General mining

A bit-crown design, in which the radius of the arc forming the rounded portion of the bit face is equal to or greater than the thickness of the bit wall.

Whole-stone bit

Mining; General mining

A bit, the crown of which is either surface set or impregnated with whole diamonds, as opposed to an impregnated or surface-set bit in which the inset diamonds are fragmented diamonds.