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

Deviation

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 ...

Oven

Mining; General mining

A chamber in which substances are artificially heated for the purposes of baking, roasting, annealing, etc.; specif.: (1) a kiln, such as a coke oven; and (2) a leer, which is used in glassmaking.

Intercepting channel

Mining; General mining

A channel excavated at the top of earth cuts, or at the foot of slopes, or at other critical places to intercept surface flow; a catch drain.

Ageing

Mining; General mining

A change in the properties of a substance with time.

A characteristic of some minerals where substitution for one or more elements by others does not change the crystal structure. An example is the substitution of iron for zinc in sphalerite, wherein ...

Toussaint-Heintzmann arch

Mining; General mining

A channel-type, steel-arch support consisting of three elements or sections set close to the face of a tunnel. These elements overlap and yield by sliding one upon the other under the constraint of ...

Double load

Mining; General mining

A charge in a borehole separated by a quantity of inert material for the purpose of distributing the effect, or for preventing part of the charge blowing out at a seam or fissure, in which case the ...