An auxiliary pump placed on the bank of a stream or a lake and used to
pump water to a distant drill. Also called supply pump. Long
The right to divert water for working a bank claim. Pryor, 3
The angle, measured in degrees of deviation from the horizontal, at which
the earthy or rock material will stand in an excavated, terracelike cut in
an open-pit mine or quarry. Syn:bench slope
A slope is subject to the influence of gravity and possible pressure of
ground water, which tend to cause sliding or caving. It is also subject to
surface erosion from running water, wind, and alternate freezing and
thawing, or wetting and drying. Weathering causes changes in particle size
and composition. Bank slope stability can be attained by benching, by
growth of vegetation, and by artificial protections, such as masonry
walls, drainage systems to intercept or remove ground water, and fences to
catch rolling pieces. See also:stability
The person in charge of the shaft and cage or skip at the surface of a
colliery; the person at the surface who operates the signals from the cage
or skip to the winding engineman. See also:cager
In placer mining, applied to streams brought to the pit in ditches, not
under pressure. Hess
Eng. A system of working coal in South Yorkshire.
Yards of soil or rock measured in its original position, before digging.
Nichols, 2
Mex. Water collected in old mine workings.
Bol. In alluvial mining, a thick bed of blocks of granite, schists, and
quartz.
Small pebbles of a banded garnet-quartz rock; usually associated with
diamond in the concentrate obtained when washing the diamond-bearing
gravels from the Vaal River in the Republic of South Africa. The
occurrence of bantams in a gravel deposit is considered a good indicator
of diamond. Chandler
A tetragonal mineral, Ba4 (Ti,Nb)8 Si4 O28 Cl.
a. A placer deposit, generally submerged, in the slack portion of a
stream. Also, an accumulation of gravel along the banks of a stream; bar
diggings.
b. A mass of inferior rock in a workable deposit of granite. AGI
c. A fault across a coal seam or orebody. AGI
d. A banded ferruginous rock; specif. jaspilite. AGI
e. A vein or dike crossing a lode.
f. Any band of hard rock crossing a lode. Arkell
g. A unit of pressure equal to 1,000,000 dyn/cm2 , 1,000 mb (100
kPa), or 29.53 in (750 mm) of mercury. Hunt
h. A bank of sand, gravel, or other matter, esp. at the mouth of a river
or harbor, often obstructing navigation. Webster 2nd
i. An offshore ridge or mound of sand, gravel, or other unconsolidated
material submerged at least at high tide, esp. at the mouth of a river or
estuary, or lying a short distance from, and usually parallel to, the
beach. Hunt
j. A drilling or tamping rod. Fay
k. A strap or beam used to support the roof between two props or other
supports. Mason
l. A length of steel pipe equipped with a flat cap at one end and a
jackscrew on the opposite end by means of which the pipe may be wedged
securely in a vertical or horizontal position across an underground
workplace to serve as a base on which a small diamond or rock drill may be
mounted. Syn:drifter bar; drill bar; drill column. Long
m. A heavy steel rod with either pointed or flattened ends used as a pry
or as a tool by miners to dislodge loose rock in roof or sidewalls of an
underground workplace. Syn:scaling bar
n. A piece of material thicker than sheet, long in proportion to its width
or thickness, and whose width-thickness ratio is much smaller than that of
sheet or plate, as low as unity for squares and rounds. ASM, 1
A compressed pill consisting of a blended mixture of barium octohydrate
and calcium hydroxide. It is used as a carbon dioxide absorbent in
rebreathing (diving) systems. Hunt
A hexagonal mineral, (NH4 )2 SiF6 ; dimorphous with
cryptohalite; occurs over a burning coal seam.
A conveyor similar to a plate-belt conveyor but in which spaced steel rods
arranged transversely are employed in place of the steel plates.
BS, 5
A hexagonal mineral, Mg6 Cr2 (CO3 )(OH)16 .4H
2 O ; manasseite group; rose-pink to violet; dimorphous with
stichtite.
A hydrous ferrous ferric phosphate, Fe2+ Fe3+2
(PO4 )2 (OH)2 ; occurs as black grains from Brazil.
Syn:ferro-ferri-lazulite
A reciprocating drill mounted on a bar by means of which holes are drilled
close together in line by shifting the drill from point to point along the
bar. Thereafter, the webs between the holes are removed with a
reciprocating chisel-pointed broaching tool that is substituted for the
drill. This method of channeling is generally employed in the harder
rocks, such as granites. Hess
A coal cutter in which the cutting member was a projecting rotating bar
armed with picks throughout its length. The bar cut a kerf in the seam as
the machine traveled along the face. The first patent for a bar machine
was taken out in 1856. The cutter is now obsolete. Nelson
A term applied in the Western United States to diggings for gold or other
precious minerals located on a bar or in the shallows of a stream, and
worked when the water is low. See also:bar mining