General mining

General mining

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

Industry: Mining

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General mining

scarcement

Mining; General mining

A projecting ledge of rock, left in a shaft as footing for a ladder or to support pitwork.

tenon

Mining; General mining

A projecting tongue fitting into a corresponding cavity called a mortise.

A prominent isolated residual knob, hill, or small mountain rising abruptly from an extensive erosion surface in a hot, dry region (as in the deserts of southern Africa or Arabia), generally bare and ...

hydraulic prop

Mining; General mining

A prop consisting of two telescoping steel cylinders that are extended by hydraulic pressure that may be provided by a hand-operated pump built into the prop. The prop holds about half a gallon of ...

Dowty prop

Mining; General mining

A prop that is in effect a self-contained hydraulic jack consisting of two tubes, the upper one telescoping into the lower. The upper (or inner) tube acts both as a reservoir for the oil and as a ...

Steart fan

Mining; General mining

A propeller or axial-flow fan developed by Steart in Australia.

photoelasticity

Mining; General mining

A property of certain transparent substances that enables the presence of strain to be detected by examination in polarized light. If models of complicated engineering structures are made of such a ...