General mining

General mining

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

Industry: Mining

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General mining

expanding reamer

Mining; General mining

A reamer capable of slight adjustment in diameter by means of a coned internal plug acting in a partially split length of the tool.

A reamer having a conical diamond-inset surface tapering from any borehole size at its lower (bit) end to the next larger borehole size at its upper (core barrel) end, such as EX to AX, AX to BX, BX ...

Morisette expansion reamer

Mining; General mining

A reaming device equipped with three tapered lugs or cutters designed so that the drilling pressure necessary to penetrate rock with a noncoring pilot bit forces the diamond-faced cutters of the ...

Thompson pilot shoulder reamer

Mining; General mining

A reaming or coring bit with an articulated steel pilot protruding about 36 in (91 cm) beyond the face of the bit. The diameter of the pilot is slightly smaller than the set inside diameter of the ...

rod reaming shell

Mining; General mining

A reaming shell designed to be coupled directly to a drill rod.

blank reaming shell

Mining; General mining

A reaming shell in which no reaming diamonds or other cutting media are inset on the outside surface.

set reaming shell

Mining; General mining

A reaming shell, a portion of the outside surface of which has embedded diamonds, diamond-inset inserts, or other cutting media, having a set diameter slightly greater than the standard set size of ...