|
| |
a. The undercut usually made in the coal to facilitate its fall.
BCI
b. A horizontal cut in a block of coal, as opposed to a shearing, which is
a vertical cut. BCI
c. Undercut in a coal seam from 3 to 7 in (7.6 to 18 cm) thick and
entering the face to a depth of up to 4 ft (1.2 m), made by a mechanical
cutter. Also called kirve. Pryor, 3
d. The undercut made in a coalbed to assist the action of explosives in
blasting. Hudson
e. The annular groove cut into a rock formation by a core bit.
See also: kervef. The space that was occupied by the material removed during cutting.
ASM, 1
g. The thickness of the wall of the diamond-insert part of the crown of a
core bit. Long
h. Sometimes incorrectly used as a syn. for nose, as applied to a diamond
core bit. Long
Source:
Dictionary of Mining, Mineral, and Related Terms
| |
|
