To assemble loaded cars from several production points and deliver them to
main haulage for transport to the surface or pit bottom. BCI
A machine for loading loose rock or coal. It has a tractor-mounted
chassis, carrying a chain conveyor the front end of which is built into a
wedge-shaped blade. Mounted on this blade are two arms, one on either side
of the chain conveyor, which gather the material from the muck pile and
feed it onto the loader conveyor. The tail or back end of the conveyor is
designed to swivel and elevate hydraulically so that the coal or stone can
be loaded into a car or on to another conveyor. See also:loader
Nelson
Any conveyor that is used to gather coal from other conveyors and deliver
it either into mine cars or onto another conveyor. The term is frequently
used with belt conveyors placed in entries where a number of room
conveyors deliver coal onto the belt. See also:gate conveyor;
trunk conveyor. Jones, 1
See:catchment area
That portion of the haulage system immediately adjacent to the face. In
longwall mining, the face belt or tubs and track along the face constitute
the gathering haulage system. Wheeler, H.R.
See:gathering motor; electric gathering mine locomotive.
See:gathering motor; electric gathering mine locomotive.
A lightweight type of electric locomotive used to haul loaded cars from
the working places to the main haulage road and to replace them with
empties. Syn:gathering locomotive; gathering mine locomotive.
See also:electric gathering mine locomotive
In bituminous coal mining, a person who operates a mine locomotive to haul
loaded mine cars from working places to sidings, for the formation of
larger trips (trains) to be handled by a haulage cable or a main-line
locomotive. Syn:relay motorman
Portable or semiportable pumps that are required when water is encountered
while opening a new mine, for extending headings or entries in an
operating mine, for pumprooms or rib sections lying in the dip, for
collecting water from local pools, or for sinking a shaft. They discharge
water at an intermediate pumping station or into a drainage ditch or
tunnel carrying water outside a mine.
Scot. See:gauton
A hexagonal mineral, Ca4 Mn3 (BO3 )3 (CO (sub
3) )(O,OH)3 ; forms prisms associated with marokite, braunite, and
hasumannite in calcite from Tachgagalt, Morocco.
An equation for the particle size distribution that can be expected when a
material is crushed in a ball mill or rod mill; it is of the form P =
100(x/D)m, where P is the percentage passing a sieve of aperture x, D is
the maximum size of particle, and m is a constant which is a measure of
dispersion. The equation holds good only if the ratio of size of feed to
size of balls is below a critical value.
See:gage
Firm compact clay; brick clay. Also spelled galt, golt.
See:gantry
A local name for burkeite. From Searles Lake, Calif. See also:burkeite
Syn:teepleite
Unit of magnetic induction in the electromagnetic and Gaussian systems of
units, equal to 1 Mx/cm2 (10 nWb/cm2 ), or 10-4
Wb/m2 . Also known as abtesla (abt). McGraw-Hill, 1
A function frequently used when fitting mathematical models to
experimental variograms, often in combination with a nugget model.
Scot. A watercourse cut in the floor of a mine or working. Syn:gatton
See also:hasson
An irregular or uneven line of coal face. CTD