See:mosaic
A system of cables from which to suspend cars or baskets, as in hoisting
ore. See also:aerial tramway
System of ore transport used in rough or mountainous country. A cable is
carried on pylons, and loaded buckets are (1) towed from loading point to
discharge, (2) suspended from a carriage running on this cable and then
returned empty along a second cable, or (3) the whole cable moves
continuously carrying buckets that hang from saddle clips and are loaded
and discharged automatically or by hand control. Syn:overhead ropeway
See also:bicable; monocable; aerial tramway; telpher. Pryor, 3
A cable for moving and anchoring a dredge. Fay
a. A survey using aerial photographs as part of the surveying operation.
AGI
b. The taking of aerial photographs for surveying purposes. AGI
A system for the transportation of material, such as ore or rock, in
buckets suspended from pulleys or grooved wheels that run on a cable,
usually stationary. See also:tramway; aerial railroad; aerial ropeway.
Fay; Peele
An organism that lives in the presence of free oxygen. The oxygen is
usually used in the cell's metabolism. See also:aerobic
a. Said of an organism (esp. a bacterium) that can live only in the
presence of free oxygen; also, said of its activities. Syn:aerobe
AGI
b. Said of conditions that can exist only in the presence of free oxygen.
CF:anaerobic
Clay, particularly china clay, that has been dried and air separated to
remove any coarse particles. Dodd
This furnishes a measure of the capacity of a fan to produce useful
depression (or positive pressure in the case of a forcing fan) and
indicates the extent to which the total pressure produced by the fan is
absorbed within the fan itself. Sinclair, 1
The diameter of a unit density sphere having the same terminal settling
velocity as the particle in question. ANSI
A fan that consists of several streamlined blades mounted in a revolving
casing. The cross section and spacing of the blades are designed
aerodynamically. This design ensures that the air flows without
recirculation between the blades and leaves the rotor in a steady and
regularly distributed stream. This appreciably reduces frictional,
conversion, and recirculation losses. Fans of a convenient size can handle
large volumes of air at the highest pressures likely to be required in
mine ventilation.
Flutter that may occur in a structure exposed to wind force. This form of
instability can be guarded against by suitable design. Hammond
a. The formation or liberation of gases in the blood vessels of the body,
as brought on by a change from a high, or relatively high, atmospheric
pressure to a lower one. Hunt
b. The disease or condition caused by the formation or liberation of gases
in the body. The disease is characterized principally by neuralgic pains,
cramps, and swelling, and sometimes results in death.
Syn:decompression sickness
A short, cylindrical grinding mill with a large diameter, used dry, with
coarse lumps of ore, pebbles, or steel balls as crushing bodies. The mill
load is flushed with an air stream to remove finish mesh material.
Pryor, 3
Synthetic water-soluble polymer used as a flocculating agent.
Bennett
An improved centrifugal-type mine fan. The vanes, of aerofoil section, are
curved backward from the direction of rotation. This fan is popular in
British coal mines, and total efficiencies of about 90% have been
obtained. See also:mine-ventilation fan
a. Enclosing a liquid in the pores or cavities, as some minerals.
Standard, 2
b. Characterized by the presence of both air and water.
Standard, 2
Pale sky-blue aquamarine beryl.
A technique of geophysical exploration of an area using an airborne
magnetometer to survey that area. Syn:airborne magnetic prospecting
AGI
An instrument for ascertaining the weight or the density of air or other
gases. Webster 3rd