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

Nugget

Mining; General mining

A large lump of placer gold or other metal. Compare: heavy gold

A length of roadway provided near a shaft bottom to stock loaded mine cars and/or empty cars: (1) during peak hours when the coal reaches the pit bottom at a faster rate than the shaft can wind; and ...

Drill collar

Mining; General mining

A length of extra heavy wall drill rod or pipe connected to a drill string directly above the core barrel or bit, the weight of which is used to impose the major part of the load required to make the ...

Drill column

Mining; General mining

A length of steel pipe equipped with a flat cap at one end and a jackscrew on the opposite end by means of which the pipe can be wedged securely in a vertical or horizontal position across an ...

Drifter bar

Mining; General mining

A length of steel pipe equipped with a flat cap at one end and a jackscrew on the opposite end by means of which the pipe can be wedged securely in a vertical or horizontal position across an ...

Drill stem

Mining; General mining

A length of steel pipe equipped with a flat cap at one end and a jackscrew on the opposite end by means of which the pipe can be wedged securely in a vertical or horizontal position across an ...