a. A lease by which the owner or lessor grants to the lessee the privilege
of mining and operating the land in consideration of the payment of a
certain stipulated royalty on the mineral produced. Ricketts
b. See:overriding royalty
c. Ownership of mineral rights under restricted terms.
Wheeler, R.R.
d. Eng. The mineral estate or area of a colliery, or a portion of such
property. A field of mining operations.
e. The landowner's share of the value of minerals produced on a property.
It is commonly a fractional share of the current market value (oil and
gas) or a fixed amount per ton (mining). See also:take
In foundry work, centrifugal belt thrower. Short length of conveyor
belting travels at 2,000 to 4,000 ft/min (600 to 1,200 m/min) and
conditions molding sands by discharging them vigorously so as to mix and
partially dry them. Similar arrangement also used in forming storage piles
and loading small material to ships. Pryor, 3
a. A monoclinic mineral, FeSO4 .4H2 O .
b. The mineral group including aplowite, boyleite, ilesite, rozenite, and
starkeyite.
a. Fr. A crystalline variety of quartz containing, distributed through it,
spangles of hematite that reflect a ruby red. Also spelled rubace. Also
known as Ancona ruby; Mont Blanc ruby. Standard, 2; Fay
b. Quartz, stained red in cracks to imitate ruby. Hess
a. Guide; binder; conductor. Mason
b. Derb. Fine scythestone; micaceous sandstone. Arkell
c. A gold-quartz amalgamator in which slime is rubbed against amalgamated
copper surfaces.
d. A bucking iron or bucking hammer. A broadhead hammer. Fay
e. A building brick made from a sandy clay and lightly fired so that it
can be readily rubbed to shape for use in gaged work. The crushing
strength of such a brick is about 1,000 psi (6.9 MPa). Dodd
Two flanged hubs, one equipped with rubber-bushed holes, the other
equipped with pins that mesh with the rubber bushings. To prevent
excessive wear, the rubber bushings are bushed with nonferrous bushings,
which provide satisfactory contact and wearing surfaces.
Pit and Quarry
A conveyor belt consisting of a central stress-bearing carcass for
transmitting power enclosed in rubber or PVC covers to protect the carcass
from abrasion and atmospheric changes. The carcass usually consists of
plies of cotton duck fabric, but other constructions used are cotton
cords, steel cables, and woven fabrics of synthetic fibers, such as rayon,
nylon, Orlon, Dacron, fiberglass, and asbestos. The covers are furnished
in various thicknesses and qualities of rubber or PVC compounds.
Pipes prepared for handling corrosive liquids in such processes as acid
leaching. Also, pumps and impellers handling ore pulps.
See also:hydraulic stowing pipe
A sharp-gritted Ohio or Indiana sandstone used for sharpening shoe knives;
also known as shoe stone.
The underground use of tractors and dump truck haulage, of battery or
diesel type, and battery-driven shuttle cars.
See also:trackless tunneling
In quarrying, a bed consisting of a circular disk of cast iron of varying
diameters, rotating on a vertical axis. Marble slabs or blocks held on the
surface of this rotating disk, to which sand and water are applied, are
worn down to desired dimensions and smoothness. AIME, 1
a. Stone used for rubbing, smoothing, or sharpening; in particular for
facing building stones by removing toolmarks. Arkell
b. A block of fine-grained abrasive, such as corundum, for the stoning of
vitreous enamel. Dodd
The total area of a given length of airway; i.e., the area of top, bottom,
and sides added together, or the perimeter multiplied by the length.
a. A loose mass of angular rock fragments, commonly overlying outcropping
rock; the unconsolidated equivalent of a breccia. CF:talus
b. Loose, irregular pieces of artificially broken stone as it comes from a
quarry. Syn:rubblestone
Concrete in which large blocks of stone, roughly squared, are placed and
arranged roughly in courses, so that they break joint both horizontally
and vertically. The stones are placed with not less than 6 in (15 cm) of
space between them so that the concrete may be properly rammed. Care is
taken that all voids are filled with concrete. Nelson
In the quarry industry, a foreman who directs and supervises the work of
drilling and splitting stone. DOT
Uncut stone, used for rough work, foundations, backing, etc.
Crispin
See:breccia
See:rubble
Aust. A vein much broken up.
A pink gem variety of elbaite. Syn:red schorl