These drills have a crawler mounting that supports the feed guide bar on
an extendable arm. Small air motors control the movements of the arm used
in tilting and turning the guide bar and provide power for crawler
movement. The compressor is a separate unit, which can be towed by the
tractor drill. Also called a Jumbo.
A tractor equipped with a bucket that can be used to dig, and to elevate
to dump at truck height. Also called tractor shovel; shovel dozer.
Nichols, 1
In beneficiation, smelting, and refining, one who scrapes up bauxite ore
from stockpiles, hauls the ore to the crusher, and dumps it into the
crusher hopper, using a combination bulldozer carryall. DOT
One of the names applied to a class of excavating equipment that has a
bucket supported from the front end of a tractor. See also:loader
Carson, 1
Abrasions that result from metal to metal contact and vibration during
transit. These abrasions are usually dark in appearance because of the
presence of a dark powder, which consists of aluminum and aluminum oxide
fines produced by the abrasive action of surfaces rubbing together.
Light Metal Age
a. A towed carrier that rests on its own front and rear wheels. Also
called full trailer. Nichols, 1
b. See:drag
a. A cable for carrying electricity from a permanent line or trolley wire
to a movable machine, such as used in mining or quarrying. The cable is
heavily insulated and protected with either galvanized steel wire
armoring, extra stout braiding hosepipe, or other material. It is usually
paid out from a reel as the machine advances.
See also:individually screened trailing cable
b. A flexible insulated cable used for transmitting power from the main
power source, such as a trolley wire, nipping station, or junction box, to
a mobile machine. It includes cables between the nipping station and
distribution center.
An assembly of two restrained-type sockets for coupling together two
trailing cables fitted with restrained plugs. BS, 13
Crushed material of a bed or vein that indicates the direction of fault
movement; it may be valuable as a guide to the main vein.
See also:drag ore
A number of empty or loaded mine cars, coupled together, for transport by
rope haulage or locomotive. See also:journey
See:motor boss
Usually a longwall coal face where new colliery entrants or trainees can
gain experience, skills, and confidence in the winning and working of
coal. Nelson
A short tunnel or chamber attached to a rescue station in which rescue
workers may receive training in an atmosphere of dense smoke. It is also
used to give rescue workers experience in stretcher drill, the use of
stretchers, reviving apparatus, tube-breathing apparatus, artificial
respiration, etc. Nelson
Adjusting the troughing idlers, return idlers, or tail or head pulleys
forward or back so that conveyor belting will run in the desired position
on the conveyor frame to prevent spilling of ore.
The trade name for a mixture of vashegyite with a colloidal zeolitic
mineral, used as a gemstone; originates near Manhattan, NV. Originally
described as banded variscite. Syn:Sabalite
In metal mining, a laborer who loads ore into railroad cars. DOT
One mile (1.6 km) traversed by one train; used as a unit in railroad
accounting. Webster 3rd
A series of mills, one after the other, each successive mill approaching
more nearly the size of the finished piece. Mersereau, 2
The grade resistance plus the track resistance. Kentucky
Line that intersects wave fronts at right angles. Schieferdecker
a. A trip of coal cars. Jones, 1
b. Generally, to move a self-propelled piece of equipment other than a
locomotive; tramcar. BCI
c. A boxlike wagon of steel, running on a tramway or railway in a mine,
for conveying coal or ore. Also called tramcar, tub, cocoa pan, corve,
corf, or hutch. CTD; Webster 3rd
d. To haul or push trams or cars about in a mine. Fay
e. A four-wheeled truck to carry a tub, corve, or hutch. Fay