Equipment for the mechanical movement of dirt, ore, coal, or other
material either horizontally or up an incline, by some form of conveyor,
bucket, chain, or rope. Nelson
A miner who loads coal by shovel rather than by machine.
See also:loader
The working and winning of coal or mineral by hand and not by machines.
Broadly, hand coal mining would imply hand holing, shot firing, and hand
filling. Nelson
Coal from which all stones and inferior coal have been picked out by hand;
large lumps. Fay
Manual removal of selected fraction of coarse run-of-mine ore, usually
performed on picking belts (belt conveyors) after screening away small
material, perhaps washing off obscure dirt, and crushing pieces too large
for the worker to handle. Hard sorting (Rand) describes picking of banket
when up to 30% of waste rock is removed. See also:sorting
Pryor, 3
a. In prospecting, valuation, and control, use of manual methods for
detaching and reducing to an appropriate size representative samples of
ore. Pryor, 3
b. One of the major breakdowns in ore sampling that includes grab
sampling, trench or channel sampling, fractional selection, coning and
quartering, and pipe sampling. These methods are used in sampling small
batches of ore, etc. CF:mechanical sampling
See:stope scraper
The selection by hand of pieces of coal with certain specific qualities
according to surface appearance. BS, 5
A drilling bit in which the diamonds are set into holes drilled into a
malleable-steel bit blank and shaped to fit the diamonds. The hand method
has been almost completely superseded by mechanical setting methods.
CF:mechanical set
A piece of rock of a size that is convenient for megascopic study and for
preserving in a study collection. AGI
A method of dust prevention used in hand-won faces, or in conjunction with
wet cutting in thick seams. The sprays are controlled by the colliers who
wet the face and the broken coal before loading. Sprays must be connected
with the pipeline through the face by means of flexible hoses; one spray
for every 20 yd (18.3 m) of face is usually sufficient. Mason
Pushing of cars by manpower. It is limited to mines of small output, to
prospects, and to work where mechanical haulage would not be justified.
See also:manual haulage
A counterpoised sweep for raising water from shallow pits.
A person employed to do various kinds of work. Fay
a. To suspend casing or pipe in a borehole in a clamp resting on blocks at
the collar of the hole. Long
b. To suspend drill string or other downhole equipment in the drill
derrick or tripod either on the hoisting line or on hooks provided in the
crown block for that purpose. Long
a. See:hanging wall; hanging bolts.
b. Scot. The hook of a miner's lamp. Fay
c. Something that hangs, overhangs, or is suspended. Webster 3rd
d. A frame containing a bearing for a shafting. Standard, 2
An explosive charge that is not properly detonated and burns and may
eventually result in a detonation at some nondetermined time.
See also:hung shot
Rods of round iron, used in shaft construction to suspend wallplates. In
concrete-lined shafts hanging rods give reinforcement, the top set being
concreted into the shaft collar and others hooked on below, with periodic
consolidation in strong rock strata as the shaft is deepened. Sometimes
called hangers. Pryor, 3; Fay
A portion of the coal seam which, by undercutting, has had its natural
support removed. Fay
Aust. Planks used to suspend a lower curb from the one above it, in cases
where backing deals are necessary. Fay
Scot. The bucket is said to hang its water when it fails to pump on
account of a faulty valve, or air between the bucket and the valve, the
column of water above the bucket being sufficient to prevent the opening
of the bucket lids.