Minor faulting that diverges from a longer dislocation at an acute angle.
Applied to the degree of luster of a mineral, reflecting with brilliancy
and giving well-defined images, such as hematite or cassiterite.
a. A joint made in a broken haulage rope. Splicing is a skilled job and
the rope ends are unlaid for a length on each side of the break and
reformed to a definite pattern. Nelson
b. Generally used to designate an insulated reconnection of wires of an
electric cable after it has been cut. BCI
c. To unite two ropes by interweaving the strands.
An enclosed connector permitting short sections of cable to be connected
together to obtain a portable cable of the required length.
Said of a vein that pinches out and is overlapped by another parallel
vein.
A miner's term long used in Eastern United States and Scotland for certain
hard dull coals with a distinctive type of fracture. Splint coals are
irregular and blocky, with an uneven rough fracture, grayish black in
color and of granular texture. Splint coals are banded coals. Coals
containing more than 5% of anthraxylon and more than 30% of opaque
attritus determined by microscopic examination are classed as splint coal.
The content of anthraxylon and opaque matter is determined perpendicular
to the bedding across the entire thin section (2 to 3 cm in width). The
opaque attrital portion of the splint coal may be intercalated with fine,
hairlike streaks of anthraxylon. It occurs mainly as bands and benches in
otherwise bright-banded coal and is wide-spread in bituminous coal seams.
Corresponds either to duroclarite or, more frequently, to clarodurite
according to the ratio of vitrinite and inertinite. May also correspond to
vitrinertite. IHCP
The property shown by certain minerals or rocks of breaking or fracturing
into elongated fragments like splinters of wood.
a. To divide the air current into separate circuits to ventilate more than
one section of the mine. CF:air split
b. The workings ventilated by that branch.
c. A bench separated by a considerable interval from the other benches of
a coal bed.
d. The upper or lower portion of a divided coal seam. CTD
e. To divide a pillar or post by driving one or more roads through it.
f. A layer of coal which has separated from its parent seam.
See also:split seam; ventilation; splitting. Nelson
g. The process of dividing a core lengthwise, dividing a granular material
into several representative parts for sending samples to several
interested parties or reducing either core storage space or the quantity
of material retained as a sample. Long
h. The division of a bed of coal into two or more horizontal sections by
intervening rock strata. Hudson
A drive-type soil sampler with a split barrel; also a swivel-type
double-tube core barrel, the inner tube of which is split.
Syn:split-tube sampler
A brilliant split apart at the base of its pyramidal forms, so as to make
two gems. Standard, 2
A bushing made in two pieces, for ease of insertion and removal.
Nichols, 1
A system of leasing practiced at Cripple Creek, Colorado, whereby the
miners and company divide the profits. von Bernewitz
Coalbed separated by clay, shale, or sandstone parting that thickens so
that both benches cannot be mined together. AGI
A core that has been split lengthwise into halves or quarters.
Long
A type of core barrel which can be opened longitudinally to remove the
core. BS, 9
A double-tube core barrel with the inner tube split lengthwise.
Long
Drum lagging made in two pieces to allow changing it without dismantling
the drum. Nichols, 1
A hardened steel having an open slit, an outside taper, an inside or
outside serrated surface. In its expanded state, it allows the core to
pass through it freely, but when the drill string is lifted, the outside
taper surface slides downward into the bevel of the bit or reaming shell,
causing the ring to contract and grip tightly the core which it surrounds.
Also called core catcher; core gripper; core lifter; ring lifter;
split-ring lifter; spring lifter. Long
A rock possessing tabular structure, or which cleaves easily in the lines
of lamination, and is consequently suitable for flagging and curbstones.
In mine ventilation, airways connected in parallel. Hartman, 2