One of a set of shelves or benches, from one to the other of which ore is
thrown successively in raising it to the level above, or to the surface.
See also:shammel
a. A stage for shoveling ore upon, or for raising water.
See also:shamble
b. To work a mine by throwing the material excavated onto a stage or bench
in the "cast after cast" method, which was the usual way before the art of
regular mining by means of shafts had been introduced.
A classification of igneous rocks based on crystallinity, degree of
saturation with silica, degree of saturation with alumina, and color
index. This system was developed in 1927 by S.J. Shand. AGI
Scot. A ring of straw or hemp put round a jumper in boring to prevent the
water in the borehole from splashing out.
a. The steel-threaded portion of a diamond bit to which the crown is
attached. Also called bit blank; blank; blank bit. Long
b. The body portion of any bit above its cutting edge. Long
c. That part of the drill steel which is inserted in the chuck of the
drill. Fraenkel
d. A bar or standard which connects a rooter tooth with the frame.
Nichols, 2
e. A ladle for molten metal, with long handles for use by two or more
workers. Webster 3rd
Eng. A marine deposit of siliceous sands and sandstone of various shades
of green and yellow gray. Also called Lower Greensand.
An explosive contained in a case so shaped as to concentrate the power of
the explosion in one small area. Shaped charges are used in
armor-penetrating weapons, such as the bazooka, for tapping open-hearth
furnaces, for cutting deep-well linings, and for breaking boulders.
Nichols, 3
An artificially blunted or shaped carbon or diamond cut to form a point
conforming to a specific profile. Long
Property of a particle that determines the relation between its mass and
surface area, and hence its response to frictional restraint.
Pryor, 4
One who makes shaped firebricks in steel molds. DOT
One who makes shaped silica bricks in steel molds. DOT
a. A vitric fragment in pyroclastics; some have a characteristically
curved surface of fracture. Shards generally consist of bubble-wall
fragments produced by disintegration of pumice during or after an
eruption. AGI
b. Syn:sherd
Combustion with excess air and short flame. ASTM
Angular flint gravel. Arkell
An orthorhombic mineral, Ca(UO2 )6 (CO3 )5
(OH)4 .6H2 O ; very radioactive; yellow-green.
Sand composed of angular quartz grains, used in making mortar.
a. Drill diamonds or carbon having sharp edges and corners that have not
been artificially blunted or rounded through use. Long
b. New-condition, unused carbon or drill diamonds. Long
c. A sedimentary rock made up of angular particles more than 2 mm in its
greatest dimension. AGI
A less-preferred syn. of "fault zone."
See:burn cut
Applied to a belt of country in which the rock is cracked in all
directions, resulting in a network of small veins.
The percentage of a specially prepared sample of coke remaining on a sieve
of stated aperture after the sample has been subjected to a standardized
dropping procedure. BS, 1