A maceral of the exinite group consisting of spore exines generally much
flattened parallel to stratification. CF:cutinite
See also:resinite
This type of coal consists of more than 50% of spores (microspores and
megaspores). Other structured components uniformly distributed through the
coal are cuticles, resin bodies, and gelified and fusinized tissues. Hand
specimens of low rank sporinite coal are brownish, with matt or granular
surfaces. The coal may have high or low ash and occurs in seams of
different geological, age but is particularly common as bands of limited
thickness in seams of the Lower Carboniferous. Sporinite coal naturally
admixed with medium rank gelitocollinite coals is used for coking.
IHCP
A colloidal form of aluminum hydroxide, Al2 O3 .H2 O
, occurring as one of the constituents of bauxite. Also called cliachite;
alumogel. Syn:diasporogelite
a. To mark the site at which a borehole is to be drilled, a piece of
equipment placed, or a structure built. Long
b. To set a drill or piece of machinery at a preselected site.
Long
c. An inclusion in a diamond. Long
d. To direct to the exact loading or dumping place. Nichols, 1
The use of one or just a few roof bolts at spot locations. USBM, 4
Low capacity, semiportable refrigeration unit of 150,000 to 500,000 Btu/h
(44 to 146.5 kW) cooling capacity that is used in cooling sites of limited
extent, such as an underground enginehouse or the face of a development
end. The refrigerant used is nontoxic, and an electric or compressed-air
drive is applied to a reciprocating compressor. Roberts, 1
The reduced level of any survey point. Hammond
A log or marker placed to show a truck driver the spot to stop to be
loaded. Nichols, 1
See:spotted slate
A slaty or schistose argillaceous rock whose spotted appearance is the
result of incipient growth of porphyroblasts in response to contact
metamorphism of low to medium intensity. CF:desmosite; spilosite;
adinole. See also:fleckschiefer; fruchtschiefer; garbenschiefer;
maculose. Syn:spotted schist; knotted schist; knotted slate.
AGI
a. In truck usage, the person who directs the driver into loading or
dumping position. Nichols, 1
b. In a pile driver, the horizontal connection between the machinery deck
and the lead (pile guide). Nichols, 1
c. See:car pincher
Simple and speedy qualitative tests used to identify minerals species when
prospecting, valuing a deposit, or testing mill products. Pryor, 3
A small haulage engine used for bringing mine cars into the correct
position under a loading chute, feeder or other point.
See also:pickrose hoist
Ore in which the valuable material is concentrated irregularly as small
particles; e.g., coarse gold in low-grade rocks. Nelson
A pump, similar to a diaphragm pump, that is not capable of delivering
water above its own height. See also:force pump
Person who directs the pouring of slag from a ladle through a spout into a
reverberatory furnace used for smelting. DOT
a. A short wooden prop set in a slanting position for supporting the coal
during the operation of holding.
b. To chock or stop, as a vehicle or wheel, by a sprag; prop.
See also:spur
c. The horizontal member of a square act of timbers running parallel to
the axis of a heading. Stauffer
d. See:rod spear; stell.
In anthracite and bituminous coal mining, a laborer who rides trains of
cars and controls their free movement down gently sloping inclines by
throwing switches and by poking sprags (short, stout, metal or wooden
rods) between the wheel spokes to stop them. DOT
The act of checking a mine car with a sprag. Korson
A mine road having such a sharp grade that sprags are needed to control
the descent of a car; hence, two-, three-, or four-sprag road.
See also:sprag
In a hydrocyclone, the discharge from the apex in spray form, showing that
the cyclone is not overloaded. Pryor, 3