a. Weathered material, including the soil, down to fresh, unweathered
rock. Legrand
b. Material resulting from the decomposition of rocks in place and
consisting of the nearly insoluble material left after all the more
readily soluble constituents of the rocks have been removed.
c. The structureless groundmass of microscopically unresolvable
constituents, consisting of particles of one to two microns or less,
usually opaque, and of a dark color. It is the same as the lower range of
fine micrinite. See also:residue
The ability of a material to store the energy of elastic strain. This
ability is measured in terms of energy per unit volume. AGI
The resilient type of coupling has many designs but essentially has
torsional response to application or variation of the transmitted load.
For the all-metal types, the resilient element may be in the form of
laminated spring packs or a cylindrical grid member, connecting the driver
and driven hubs. Resilience damps shock loads and also provides means of
keeping gear teeth in contact, compensating for small errors in gear
cutting. Other types use rubber or rubberlike material that may be in the
form of a spider, segmental blocks, a number of balls, or a molded disk
with metal inserts, providing the connection between the driver and driven
hubs. Pit and Quarry
A device for testing resilience. Standard, 2
a. One of various hard, brittle, transparent or translucent solids formed
esp. from plant secretions and obtained as exudates of recent or fossil
origin, such as conifers and certain tropical trees, by condensation of
fluids on loss of volatile oils. Resins are yellowish to brown with
resinous luster; fusible and flammable; soluble in ether and other organic
solvents, but not in water; and represent a complex mixture of terpenes,
resin alcohols, and resin acids and their esters. CF:amber;
fossil resin. See also:mineral resin
b. A synthetic addition or condensation polymerization substance or
natural substance of high molecular weight, which under heat, pressure, or
chemical treatment becomes moldable. See also:bead; beads.
Jessop
A passive roof-bolting technique in which a rebar-type bolt is anchored in
resin. A two-part resin cartridge is placed at the back of a hole and is
mixed as the bolt is inserted and rotated. The bolt is forced tight
against the roof until the resin sets.
An ion exchange process applied in acid-leach slurry from which abrasive
particles of sand have been removed. Abbrev., R.I.P. Pryor, 3
The method in which pulp is classified to remove the sands, and the resin
adsorbs the metal directly from the slime pulp without the necessity of
thickening or filtering. It is esp. adapted for ores that do not settle
readily, and where thickening and filtration are difficult.
Newton, 1
A maceral of coal within the exinite group, consisting of resinous
compounds, often in elliptical or spindle-shaped bodies representing
cell-filling matter or resin rodlets. CF:cutinite; sporinite.
AGI
This coal consists of more than 50% of small resin bodies embedded in
gelito-collinite, fusinito-collinite, or in collinite of fusinitic nature.
The resin bodies differ in shape and may be angular, spheroidal, or
lenticular. Varying in size, they may be visible to the unaided eye in a
hand specimen of coal or only distinguishable under the microscope.
Resinite coal may also contain small quantities of microspores, fine
fragments of fusinized tissue, and, not infrequently, broad streaks of
vitrinite. Hand specimens of resinite coal are matt or semimatt and in
coals of low rank are brown or brownish-black. On fractures perpendicular
to the bedding, the resin bodies appear rounded, black, and lustrous; in
the bedding planes themselves they frequently appear as matt rodlets.
Resinite coals frequently are high in ash. IHCP
See:sphalerite
A coal constituent similar to material derived from resin. AGI
a. Resembling resin, as opal, and some yellow varieties of sphalerite.
Fay
b. The luster on fractured surfaces of minerals, e.g., opal, sulfur,
amber, and sphalerite, and rocks, e.g., pitchstone. CF:vitreous
Coal in which the attritus may contain a large proportion of resinous
matter. Coals of this type are found more often among the younger coals.
AGI
A fossil resinous secretion that may be isolated from coal. It was
presumably deposited in a resin duct by a secretory epithelium.
AGI
See:cassiterite
a. When an air current flows through a mine it meets with frictional
resistance from the roof, sides, and floor. The amount of this resistance
depends upon the extent and nature of the rubbing surface, the area of the
airways, and the velocity of the air. See also:Atkinson
b. In flotation, a property opposing movement of material or flow of
energy, and involving loss of potential (voltage, temperature, pressure,
and level). Fuerstenau
c. The property of an electrical circuit that opposes the flow of a
current and is measured in ohms. Syn:thermal resistance
A version of the catalytic methanometer with the addition of improved
detector elements. Platinum may be used as the filament that both heats
the detecting element and acts simultaneously as a resistance type
thermometer. Gas is drawn through the instrument by a rubber suction bulb,
and the filaments are heated from a dry battery of the mercury type
contained in the apparatus. Readings of methane concentration can be taken
on the built-in electrical meter. Nelson
As applied to electric blasting caps, the total resistance of the leg
wires and the bridge wire. Fraenkel
See:electrical resistance strain gage
Specific value of the resistance of the rock to the explosive force,
determined by trial blasting. It is a function of maximum burden, hole
depth, quantity of explosive (degree of packing), and throw.
Fraenkel