See:marble saw
In bituminous coal mining, one who drills holes into the slate roof of
haulageways, and charges and sets off explosives to blast down slate to
increase height or improve the safety of the roof. DOT
In bituminous coal mining, a laborer who assists the slate shooter in
removing the slate and rock from the roof, ribs, and face of haulageways.
Also called rockman helper; slateman helper. DOT
A variety of crystallized calcite. Also called shiver spar.
Standard, 2; Fay
A gate, for controlling water, composed of two upright grooved posts with
boards between the boards of slats being removed or added to regulate the
height of water.
Scot. Ironstone and flaky blaes. Nelson
A pervasive, parallel foliation of fine-grained, platy minerals (mainly
chlorite and sericite) in a direction perpendicular to the direction of
maximum finite shortening, developed in slate or other homogeneous
sedimentary rocck by deformation and low-grade metamorphism. Most slaty
cleavage is also axial-plane cleavage. Syn:flow cleavage
A small cylinder whose piston is moved by a piston rod controlled by a
larger cylinder. Nichols, 1
A small piston having a fixed connection with a larger one.
Nichols, 1
A machine controlled by or through another unit of the same type.
Nichols, 1
a. Eng. A kind of reddish sandstone.
b. Eng. Small pit coal. Arkell
c. Newc. Mud deposited by water in a mine.
d. See:slack
A drag used to convey coal along the road to where it is loaded into cars,
or to the chute. Also called sledge; slype. Fay
a. In bituminous coal mining, one who digs out dirt, rock, or coal with a
long-handled pick (sledge) in a strip mine so that it may be loaded into
cars by hand or with a power shovel. DOT
b. In the quarry industry, one who breaks up large stone into small pieces
suitable for use in building work. Also called laborer, stone; rock
breaker; spawl beater; stone sledger. DOT
Crushing roll with projection that breaks the rock, instead of fracturing
it by squeezing. Also called slugging roll. Pryor, 3
A fixed rent stated in leases of coal mines, as distinguished from royalty
or share of profits. Standard, 2
A skirt-type core lifter. Long
A beam, which if overloaded, will fail by buckling of the compression
flange. Hammond
a. To turn around (slue). Mason
b. See:slough
a. The rotation of a crane jib so that the load moves through the arc of a
circle on a horizontal line. Hammond
b. To turn or twist.
a. To remove ore by successive slices from the top of an orebody of
considerable lateral extent and thickness. The slices may be 6 ft, 12 ft,
20 ft, or 40 ft (1.8 m, 3.6 m, 6.1 m, or 12.2 m) thick.
b. A thin broad piece cut off, such as a portion of ore cut from a pillar
or face.
A thin, wide iron tool for cleaning clinkers from the grate bars of a
furnace. Standard, 2