A multiple-cell machine of the mechanical agitation type.
a. Cutting rock by the very high force of a water jet against the ore so
that the material could be processed for mineral recovery. SME, 1
b. Penetration of high-pressure water into material cracks such that the
cracks between the grains are propagated and cutting occurs.
See also:hydraulic mining
See:cannel coal
Consists of a length of pipe that is lowered from a vessel to obtain
samples. High-velocity water is pumped through the pipe, and the jetting
action of this water issuing from the lower end of the pipe very
effectively cuts a hole in the unconsolidated overburden sediments. Once
at bedrock, the pipe is rammed into the rock with sufficient force to
obtain a plug several inches in length. Mero
Piercing of rock strata by use of high-temperature flame to fuse the rock,
together with jets of water to cause decrepitation and to flush the
fragments out. Pryor, 3
Enclosed chamber of relatively small cross section in which gas, at
substantially high atmospheric pressures, is circulated at high speed, 400
to 700 ft/s (120 to 210 m/s).
a. A borehole drilled by use of a directed, forceful stream of fluid or
air. See also:jet
b. A small hole in a nozzle. See also:jet
Stream of water used in alluvial mining. Pryor, 3
A powder loader for loading horizontal drill holes with a diameter of more
than 2 in (5.1 cm). It is intended for AN-prills and oil, and is also
employed to blow sand into the holes for stemming. Langefors
Differs from other mills in that the material is not ground against a hard
surface. Instead, a gaseous medium is introduced. The gas may convey the
feed material at high velocity in opposing streams or it may move the
material around the periphery of the grinding and classifying chamber. The
high turbulence causes the particles and feed material to collide and
grind upon themselves. Cote
An apparatus that utilizes the mixing action of a water stream jetted into
dry drill-mud ingredients to form a mud-laden fluid. CF:atomizer
Long
A name given to vitrain lamellae in coal. Synonymous with vitrain.
Tomkeieff; AGI
The use of high-velocity jet flames to drill holes in hard rocks, as
taconite, and to cut channels in granite quarries. It involves combustion
of oxygen and a fuel oil fed under pressure through a nozzle to produce a
jet flame generating a temperature above 2,600 degrees C. A stream of
water joins the flame, and the combined effect is a thermodynamic spalling
and disintegration of the rock into fragments that are blown from the hole
or cut. Syn:thermic drilling
Consists of a centrifugal pump and motor at the ground surface and a jet
down in the well below the water level, discharging at high velocity
through a contracted section into the lift pipe. The centrifugal pump has
two discharge pipes; one leads down to the jet, the other carries the
water into the distribution system or into a storage tank.
Syn:jet impact mill
a. A coallike shale containing jet. Standard, 2
b. See:jet shale
Bituminous shale containing jet. See also:jet
A term for black tourmaline (schorl) in New South Wales, Australia.
Corn. The horizontal rods or poles connecting the water wheel and the
pumps.
The process of sinking a borehole, or of flushing cuttings or loosely
consolidated materials from a borehole, by using a directed, forceful
stream (jet) of drilling mud, air, or water. AGI