6 Terms
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General mining
General mining related terms and definitions in minerals and related activities.
Industry: Mining
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General mining
Incompetent bed
Mining; General mining
A bed that, in a particular case of folding, has yielded to the lateral pressure by plastic adjustment and flow. This may result in the bedding being thrown into complex structures or in the ...
Precision idler bearing
Mining; General mining
A bearing having ground races and in which the bore and outside diameter tolerances are held to ten-thousandths of an inch and the width tolerance to thousands of an inch.
Biostrome
Mining; General mining
A bedded, blanketlike mass of rock composed mainly of the remains of sedentary organisms; an organic layer, such as a bed of shells or corals, or even a coal seam. Compare: bioherm.
Whole-circle bearing
Mining; General mining
A bearing that defines the direction of a survey line by its horizontal angle measured clockwise from true north.
Antifriction bearing
Mining; General mining
A bearing consisting of an inner and outer ring, separated by balls or rollers held in position by a cage.
Bearing bed
Mining; General mining
A bed that contains, or is likely to contain, ore minerals; one that is productive as opposed to dead or barren.
Slender beam
Mining; General mining
A beam, which if overloaded, will fail by buckling of the compression flange.
