A plastic mix of clay of very stiff consistency, as extruded from an auger
machine.
The ability of a metal or shape to resist elastic deflection. For
identical shapes, the stiffness is proportional to the modulus of
elasticity. ASM, 1
Scot. Noxious gas resulting from an underground fire.
a. A monoclinic and triclinic mineral, Na2 Ca4 [Al10
Si26 O72 ].34H2 O ; zeolite group, with K replacing
Na; forms sheaflike crystal aggregates and radiated masses in cavities in
igneous rocks, as an alteration of plagioclase, or in hydrothermal veins.
b. Ger. See:heulandite
a. An apparatus in which a substance is changed by heat into vapor, with
or without chemical decomposition. The vapor is then liquefied in a
condenser and collected in another part of the apparatus.
Standard, 2
b. See:amalgam retort
The residue left in the still on distilling crude shale oil to dryness.
Fay
A chamber connected to a main body of water by a small inlet; such an
arrangement is suitable for a recording gage. Hammond
The pipe wrench of common use, named for its inventor. Crispin
A trigonal mineral, (Ce,La,Ca)BSiO5 .
A monoclinic and triclinic mineral, K(Mg,Fe)8 (Si,Al)12
(O,OH)27 (?) ; black to green-black; in micalike plates, fibrous
forms, and velvety bronze-colored incrustations. Syn:chalcodite
A device to allow roadway steel arches a measure of yield under roof
pressure to prevent buckling. The stilt may take the form of wooden
extensions strapped to the legs of the arch, wire bags filled with dirt, a
mechanical frictional appliance, or a hydraulic stilt.
See also:yielding support
a. A steel cylinder projecting beyond the face of a cutting bit that
serves as a pilot or guide. See also:pilot
b. The pneumatically actuated piston attached to a pointed rod that acts
as a feed mechanism on a stoper drill. Long
To ream a borehole using a reaming bit equipped with a pilot or stinger.
Long
Hot air and flame exhausted through openings in furnaces or tanks due to
positive internal pressure. ASTM
A mining term for hydrogen sulfide. The gas has an unpleasant smell,
resembling that of rotten eggs, hence the name. The presence of this gas
may indicate a gob fire in its early stages. Produced by the
distintegration of iron pyrites. See also:damp
a. A British miner's term for inferior coal that stinks when burned.
Tomkeieff
b. A Welsh term for dolomite. Arkell
A variety of quartz that emits a fetid odor when struck. Fay
See:stinkstone
a. A stone that emits an odor on being struck or rubbed; specif. a
bituminous limestone (or brown dolomite) that gives off a fetid smell
(owing to decomposition of organic matter) when rubbed or broken. It may
emit a sweet-and-sour smell if the carbonate rock is rich in
organic-phosphatic material. See also:anthraconite;
bituminous limestone. Syn:stinkstein
b. Boulders of phosphate rock from Tennessee.
A fixed work target on the coalface that every collier is expected to do
in one shift or a single week. In longwall conveyor work, it is the
length, area, or volume of face that the miner regularly clears or loads
out. Also called stent; cut. Syn:cut
See:hitch