a. In the case of coal, coke, and other bituminous materials, the solid
residue, other than ash, obtained by destructive distillation; determined
by definite prescribed methods. ASTM
b. A calculated figure: 100, less the sum of the percentages of moisture,
volatile matter, and ash. BS, 4
An aerial ropeway in which a moving endless rope both supports and
transports carriers that are permanently fixed to it. The length of the
line may be several miles. Individual loads are limited to about 2
hundredweight (91 kg), and total capacity seldom exceeds about 15 st/h
(13.6 t/h). Nelson
A geophysical surveying method used in the self-potential system of
prospecting, in which one electrode remains stationary while the other is
grounded at progressively greater distances from it. The method indicates
a mineral body directly beneath the greatest anomaly and has been
extensively and successfully used.
fixed-flexible-type carrying idler
Consists of a flexible-type carrying idler mounted in a rigid frame, which
fixes the position of the points or roll support. NEMA, 2
Ground water in material having interstices so small that the water is
held permanently to the walls of the interstices, or moves so slowly that
it is not available for withdrawal at useful rates. Outside the zone of
saturation, material with infinitely small openings can hold water
indefinitely against the pull of gravity, whereas within the zone of
saturation there is apparently always movement, even though at very low
rates. AGI
Wood bars or steel rails fixed vertically to cross buntons in a shaft. The
cage shoes travel along the guides and therefore prevent the cage from
swinging and doing damage in the shaft. Some skips are fitted with
rubber-tired rollers running on 6-in by 4-in (15-cm by 10-cm) steel
channel guides. Guide shoes may be fitted to act as alternative guides in
case of breakdown of rollers. Fixed guides are used when shaft space is
limited; i.e., when the clearances do not permit the use of flexible or
rope guides. See also:steel guides
A stationary inclined or curved panel, commonly made of wedgewire, which
is used to remove fines and a large proportion of water from a suspension
of coal in water. BS, 5
A monoclinic mineral, Pb14 Ag5 Sb21 S48 (?) ;
soft; forms deeply striated prisms at Kisbanya, Romania, where it is
associated with semseyite, pyrite, galena, and sphalerite.
a. Sandstone or sandy limestone rock, usually more or less micaceous,
which is fissile along the bedding planes, splitting into slabs. Sometimes
misnamed "slate" because it is used for roofing rather than paving.
Arkell
b. A thin slab of stone. Syn:flagstone
c. A track signal or target. Zern
In bituminous coal mining, a laborer who attaches a flag to the rear car
of a loaded train of cars (if the flag is missing at end of a haulage
trip, it denotes that the train has lost one or more cars, and all
motormen are warned). Also called flagman. DOT
In geophysical work, the use by surveyors of flags of cloth, paper, or
plastic to mark instrument or shot locations.
a. Splitting or tending to split into layers of suitable thickness for use
as flagstones; specif. descriptive of a sedimentary rock that splits into
layers from 1 to 5 cm thick (McKee &Weir, 1953). AGI
b. Said of bedding that consists of layers from 1 to 10 cm thick (Payne,
1942). AGI
c. Pertaining to a flag or flagstone. AGI
d. Said of a soil full of flagstone fragments. AGI
An orthorhombic mineral, C10 H22 O3 , cis-terpin
hydrate; forms colorless transparent crystals in fossil pine logs near the
San Francisco Peaks, north of Flagstaff, AZ.
a. A hard sandstone, usually micaceous and fine-grained, that occurs in
extensive thin beds with shale partings; it splits uniformly along bedding
planes into thin slabs suitable for use in terrace floors, retaining
walls, etc. CF:bluestone; freestone. AGI
b. A flat slab of flagstone used for paving; esp. a thin piece split from
flagstone. Also, a surface of such stone. AGI
c. A relatively thin flat fragment (of limestone, sandstone, shale, slate,
or schist) occurring in the soil, having a length in the range of 6 to 15
in (15 to 38 cm). Syn:flag; slabstone; grayband. AGI
A hammer hinged to an axle so that it can be used to break or crush
material. Nichols, 1
Very thin scales of native copper. Weed, 2
Graphite disseminated in metamorphic rock as thin, visible flakes that are
separable from the rock by mechanical means.
Syn:crystalline flake graphite
Finely divided mica recovered from mica and sericite schist and as a
byproduct of feldspar and kaolin beneficiation. See also:scrap mica
Skow
Pyrite occurring as thin flakes on the natural cleavage surfaces of coal
that floats readily on the surface of the wash water in the washing
process. Syn:float sulfur
A name sometimes given to pure white lead. Fay
The optical continuity of crystals or grains, as disturbed by a divergent
structure caused by slight differences in orientation. AGI