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

Clay marl

Mining; General mining

A chalky clay, or a marl in which clay largely predominates.

Conveyor chain

Mining; General mining

A chain used in the conveying medium of conveyors.

Coke oven

Mining; General mining

A chamber of brick or other heat-resistant material in which coal is destructively distilled. Coke ovens are of two principal types: (1) beehive ovens, which were originally built round with a ...

Displacive transformation

Mining; General mining

A change in crystal summetry as a result of changes in bond length or bond angles (as contrasted to reconstructive transformations). The short-range order is unchanged; the long-range order is ...

Drainage trench

Mining; General mining

A channel cut alongside a mine roadway to provide for drainage and enable the proper ballasting of the rail track. The trench may be lined with precast concrete sections to a carefully laid gradient.

Wall-rock pattern

Mining; General mining

A channel dispersion pattern in which the minor elements of the walls of the channels have been modified. Wall-rock dispersion patterns of importance usually are those formed at the time the ...

Deflection

Mining; General mining

A change in the intended course of a borehole produced intentionally or unintentionally by various conditions encountered in the drill hole or by the operational characteristics of the drilling ...