A factor relating similar blast effects from various size charges of the
same explosive at various distances; it is computed by dividing the
distance of concern by an exponential root of the explosive quantity
detonated per delay.
A door that has an air regulator. Syn:regulator door
A closed crystal form, each face of which is a scalene triangle; trigonal
scalenohedra have 12 such faces; tetragonal have 8. Adjective:
scalenohedral. See:dogtooth spar
See:hardness scale
a. An electronic instrument for counting radiation-induced pulses from
Geiger counters and other radiation detectors. Lyman
b. A laborer who knocks the roasted lead ore off grates with a bar as it
is dumped from conveyors into cars below, prior to melting, to separate
and recover the lead. Lead ore is loaded on grates attached to a conveyor
and carried through a furnace in which the sulfur is driven off by
roasting. DOT
For weighing materials in transit, these include the track scale (carload
lots) in which the load is checked by manual operation of weights;
platform scales; automatic dump hoppers; conveying weighers that
continuously record or register the weight of a portion of passing
conveyor belt. Pryor, 3
In plant design, calculations of required capacities, machine sizes, etc.,
from data obtained in batch and pilot testing. Pryor, 3
a. The plucking down of loose stones or coal adhering to the solid face
after a shot or a round of shots has been fired. Nelson
b. Removal of loose rocks from the roof or walls. Also called ramming.
CF:exfoliation
A long metal bar flattened on one end and used to remove loose material
from a mine roof or rib. See also:bar
A furnace or oven in which plates of iron are heated for the purpose of
scaling them, as in the preparation of plates for tinning. Fay
In mining, consists of the removal of loose overhanging rock.
Streefkerk
a. Eng. Loose ground; foliated ground is frequently called scally ground
by miners. Also spelled scal. Probably a variation of scale.
b. Rock easily broken up because of its scaly structure.
a. Eng. To cut or break off the sides of a heading without holing or using
powder.
b. Eng. To get or hew coal off the face. SMRB
c. One of a mosaic of small shallow intersecting hollows formed on the
surface of soluble rock by turbulent dissolution. They are steeper on the
upstream side, and smaller sizes are formed by faster-flowing water.
Syn:flute; solution ripple. AGI
a. The process of removing oversize lumps on a continuous basis from a
stream of bulk material.
b. Removing large pieces of mine waste from run-of-mine coal, usually when
passing over a screen, on way to the preparation plant.
Heavy screen shielding fine screen for separating differently sized
particles. Bennett
a. The removal, by screen or grizzly, of undesirable fine material from
broken ore, stone, or gravel. Nelson
b. A milling term for the removal of a mineral during closed-circuit
grinding of the ore. Pryor, 2
A coarse primary screen or grizzly; usually a vibrating grizzly.
Nichols, 1
Said of the texture of a mineral, esp. a mica, in which small plates break
or flake off from the surface like scales. AGI
Eng. Applied to freestone in thin layers, mixed with mica.
N. of Eng. Soft, short, jointy freestone, thinly laminated and much mixed
with mica.