A vein made up of layers of different minerals parallel with the walls.
Also called ribbon vein. Fay
An arrangement by which colliers are paid an agreed sum for removing a
dirt band, in addition to the usual tonnage rate. The payment varies with
the thickness of the band. Nelson
In concentration on shaking table, the movement of a segregated band of
mineral so that it no longer discharges from the table deck at the desired
point and therefore is not correctly collected. See also:wander
Pryor, 1
A tetragonal mineral, CuB(OH)4 Cl ; occurs as dark blue crystals in
Chile.
Shale with thin sandstone bands. Arkell
a. A large pile of mineral material on the ground surface, as in heap
leaching.
b. Several like pieces of equipment set close together, as a bank of
flotation cells, hydrocyclones, or generators.
c. The surface around the mouth of a shaft. Zern
d. The whole or sometimes only one side or one end of a working place
underground.
e. A hill or brow.
f. A road along the coal face formed by the coal on one side and the waste
or packs on the other; thus, a double-unit face has a right and left bank.
g. A generally steeply sloping mass of any earthy or rock material rising
above the digging level from which the soil or rock is to be extracted
from its natural or blasted position in an open-pit mine or quarry.
Syn:bench face
h. Terracelike bench from which ore is obtained in an open-pit mine.
A portable, manually operated system used in prospecting alluvial deposits
to depths of 50 ft (15.2 m) or more. Also known as an Empire drill.
A mining claim on the bank of a stream.
Coal contained in, and sometimes salvaged from, the bank. BCI
Eng. An engine at the mouth of a mine shaft. Standard, 2
Aust. The worker who attends to taking skips off the cage. Fay
a. A general term for a compact, siliceous conglomerate of vein-quartz
pebbles about the size of a pigeon's egg, embedded in a quartzitic matrix.
The term was originally applied in the Witwatersrand area of South Africa
to the mildly metamorphosed gold-bearing conglomerates containing
muffin-shaped quartz pebbles and resembling an almond cake made by the
Boers. Etymol: Afrikaans, a kind of confectionery. AGI
b. Originally applied by the Dutch settlers to the gold-bearing
conglomerates of the Witwatersrand. It is now used more widely for similar
conglomerates and conglomeratic quartzites. CTD
Gravel found in natural deposits, usually more or less intermixed with
sand, silt, or clay. AGI
a. The upper end of an inclined plane, next to the engine or drum, made
nearly level. Zern
b. The mouth and immediate environs of a coal mine. Webster 3rd
The vertical height of a bank as measured between its highest point or
crest and its toe at the digging level or bench. CF:berm
bench height; digging height.
a. The bringing of a cage to a stop at the rail level (the pit top or
bank) and the replacement of loaded mine cars by empty ones and the
release of the cage for its return journey.
b. Closing down a blast furnace which is still full of burden.
a. The quantity of an excavation measured in place in the bank before
being disturbed. Carson, 1
b. Volume of soil or rock in its original place in the ground.
Nichols, 2
Surface mining in which the material mined is removed from above the
surrounding land surface. AIME, 2
A row of flotation cells in line. Pryor, 4
A row of ovens for converting coal into coke. Fay
Devices for minimizing scour. These include brushwood held in place by
wooden pegs, embankments, grass and withy planting, groins, mattresses,
revetments, and riprap. Hammond