General mining

General mining

General mining related terms and definitions in minerals and related activities.

Industry: Mining

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General mining

Phyllite

Mining; General mining

A type of foliated metamorphic rock primarily composed of quatz, seiricte mica and chlorite.

Adit

Mining; General mining

A nearly horizontal passage from the surface by which a mine is entered and dewatered. A blind horizontal opening into a mountain, with only one entrance.

Arrastra

Mining; General mining

A mill, consisting of one or more large stones dragged around on a circular bed, used to grind ore.

Chilean mill

Mining; General mining

A machine, somewhat like the arrastra, in which heavy stone wheels turn about a central shaft and crush ore.

Cornish pump

Mining; General mining

A type of pump developed in Cornwall, England, and commonly used in deep mines of the nineteenth century to raise underground water.

A passageway driven between the entry and its parallel air course or air courses for ventilation purposes. Also, a tunnel driven from one seam to another through or across the intervening measures; ...