Traveling without load, except from the dumping area to the loading point.
Nichols, 1
a. One that extends into solid coal beyond the part that can be broken by
the maximum safe charge of explosive. Zern
b. A shothole so placed that its width at the point (toe), measured at
right angles to the drill hole, is so great that the heel is not strong
enough to at least balance the resistance at the point (toe). Zern
c. A shallow hole in an iron casting. Standard, 2
a. A row of marked empty powder kegs or other danger signal placed by the
fireboss to warn miners not to enter workings containing gas. Fay
b. The part of a block-and-tackle cable from the traveling block to the
deadline anchor. Long
The fixed point on a drill rig or deadman to which a deadline of a block
and tackle is attached. Long
The downward pressure on a structure caused by gravity only, such as the
weight of a long string of drill rods suspended from the sheave in a drill
derrick. Syn:static load
A lode not containing valuable minerals in paying quantity. Fay
a. A wooden block used to guard the mouth of a mine against runaway cars.
Fay
b. A buried log, timber, concrete block, or the like serving as an anchor
to which a pulling line can be attached. Long
Desensitizing of an explosive, caused by excessive pressure or high
density.
Quartz carrying no valuable mineral.
Of a mineral lease, the rent that must be paid whether or not minerals are
being extracted. Pryor, 3
a. A roasting process for complete elimination of sulfur or other
volatiles. Syn:sweet roast
b. In fluidization roasting, restriction of entering air to permit
oxidation of sulfides, while not allowing process to proceed to any marked
degree of sulfate roasting. Pryor, 3
Sulfide ores are dead roasted when all the sulfur possible to drive off by
roasting has been eliminated. Weed, 2
The material removed in the opening of a mine that is of no value for
milling purposes. Waste rock.
The state of metal that has been fully annealed. Light Metal Age
a. Fully killed steel, which sinks quietly in the ingot mold during
solidification.
b. Steel that fails to respond to heat treatment because it has been
worked at excessively high temperatures; e.g., 1,300 to 1,350 degrees C.
Osborne
In flotation, the interval of time between initiation of an input and the
start of the resulting response. It may be qualified as effective if
extended to the start of the buildup time, theoretical if the dead band is
negligible, and apparent if it includes the time spent with an appreciable
dead band. Fuerstenau
A core barrel or drill rod that does not oscillate or vibrate when rotated
at high speed is said to be dead true. Long
See:dead bed
Veins barren of economic minerals.
a. The weight of a vehicle or carrier itself as distinguished from carried
or live load. Crispin
b. The difference, in tons, between a ship's displacement at load draft
and light draft. It comprises cargo, bunkers, stores, fresh water, etc.
CTD
a. Work that is not directly productive--the removal of rock, debris, or
other material that is not directly productive of coal--though it may be
necessary for exploration and future production. Unfinished work.
See also:stonework
b. Unproductive or stone work; the handling of stone or dirt as a
preliminary step to winning and working the coal seam. The aim is to keep
the dead work per yard of face or ton of coal to the minimum practicable
figure. See also:unproductive development
c. Any kind of miner's work other than actual coal getting and transport.
Mason d. Exploratory or preparatory work, such as cleaning falls of roof,
removing rock, etc., during which little or no coal is secured.
Hudson
e. The development of a mine when no ore is being raised. Gordon
f. Work done by a contractor not provided for in the yardage or tonnage
contract rates. Mason
g. S. Afr. Necessary work to reach and exploit the valuable portions of
the mine. Shaft sinking, crosscutting, driving of levels, etc., belong to
dead work. Beerman