A plain composed of flat-lying or gently tilted sedimentary rocks from
which sediments have been removed down to some resistant bed that has
controlled the depth of erosion. CF:dip slope
a. A nearly depleted well whose income barely exceeds operating cost of
production. Wheeler, R.R.
b. In the quarry industry, a laborer who cleans up dirt left by the power
shovel in stripping overlying ground from rock, using a shovel and
wheelbarrow. DOT
a. The removal of earth or nonore rock materials as required to gain
access to the desired coal, ore, or mineral materials; the process of
removing overburden or waste material in a surface mining operation.
b. The earth, rock, or soil so removed.
c. The loading or clearing away of coal from a longwall face after
shotfiring. Nelson
d. Opencast mining. Nelson
e. See:stripping the quarry; strip.
f. In chemical extraction of minerals, treatment of pregnant solution to
remove dissolved values. Pryor, 3
Removing the headings from off the wash dirt, which is left undisturbed.
Aust. The forming of a jig, by enlarging a cut-through on an incline.
See also:jig
a. See:strip
b. Robbing a mine of its best ore.
In stripping operations, an area encompassing the pay material, its bottom
depth, the thickness of the layer of waste, the slope of the natural
ground surface, and the steepness of the safe slope of cuts.
Nichols, 1
a. Taking out the timber from an abandoned shaft.
b. Trimming or squaring the sides of a shaft.
The strip area that includes area of pay material plus enough area beyond
the limits of the ore pit to provide for a bench. The total volume of
stripping will be that vertically above the limits of the ore pit plus
that outside of the ore pit necessary to maintain safe strip-pit slopes
and benches and provide working approaches to the pit. Jackson, 3
The unit amount of spoil or overburden that must be removed to gain access
to a unit amount of ore or mineral material, generally expressed in cubic
yards of overburden to raw tons of mineral material.
See:abraumsalze
A shovel with an esp. long boom and stick that enables it to reach further
and pile higher. Nichols, 2
In bituminous coal mining, one who operates a power shovel in a strip mine
to strip back overlying ground and to load coal into cars. Also called
coal-loading-shovel engineer; loading-shovel engineer. Syn:boom cat
DOT
In solvent extraction, the aqueous solution used to re-extract the metal
from the pregnant solution.
The removal of the overburden and mining of the ore in one or more
benches, the ore face being broken by blasting and the broken ore loaded
by hand, shoveling machine, or steam shovel. The name "terrace or bench
open-pit working" has been suggested.
The removal of all dirt and unwanted disintegrated material from the
quarry face. See:stripping
A coal or other mine worked by stripping. An open-pit mine.
A sample, making a notch or groove, cut from roof to floor of a coal seam,
or from hanging wall to footwall of a vein. See also:channel sample
See:decollement
a. The distance traveled by a piston in a pump or a piston in a
hydraulic-feed mechanism on a drill. Long
b. The maximum distance a piston moves within a cylinder before the
direction of its travel is reversed. Long
c. The distance a churn-drill stem and bit are raised for dropping while
drilling. Long
The difference between the open and closed positions measured at the
throat of the crusher. For small crushers it is about 3/8 to 3/4 in (0.95
to 1.9 cm), and for large crushers from 1 to 2 in (2.5 to 5 cm). Also
called throw of crusher. Newton, 2