a. A type of drill-rod-foot safety clamp built somewhat like a spider and
slips, but differing by having the slips or movable jaws attached to, and
actuated by, a foot-operated lever. Long
b. A general term applied to rod and/or casing safety clamps having both
fixed and movable serrated jaws that contact and securely grip the rods or
casing. Long
c. A fishing tool consisting of a steel body, tapered at the top, on which
slide two or more wedge-shaped, serrated-face segments. Lowered into a
tubular piece of lost equipment, such as casing, the serrated segments are
pushed upward toward the narrow part of the body; when the tool is raised,
the segments are forced outward, securely gripping the lost equipment.
Also called bulldog spear; casing dog; casing spear. Long
d. To pull or move a drill machine or auxiliary equipment by means of a
block and tackle or by power derived from a rope used on the drill cathead
or hoist drum. Also called cat; snake. Long
a. To level or excavate an earth surface by means of a heavy, adjustable
steel blade attached to the front end of a tractor or a wheeled vehicle.
Long
b. To reduce broken rock by the use of explosives to a size handy for
raising to the surface. See also:adobe charge; mudcap;
secondary blasting.
a. In nonmetal mining, a laborer who breaks up large stones with a sledge
hammer or pneumatic drill so they will pass through grizzly (grating) in a
limestone mine. DOT
b. A horizontal machine, usually mechanical, having two bull gears with
eccentric pins, two connecting links to a ram, and dies to perform
bending, forming, and punching of narrow plate and bars. ASM, 1
c. A cleaning blade that follows the wheel or ladder of a ditching
machine. Nichols, 1
d. A tractor on the front end of which is mounted a vertically curved
steel blade held at a fixed distance by arms secured on a pivot or shaft
near the horizontal center of the tractor. The blade can be lowered or
tilted vertically by cables or hydraulic rams. It is a highly versatile
piece of earth excavating and moving equipment esp. useful in land
clearing and leveling work, in stripping topsoil, in road and ramp
building, and in floor or bench cleanup and gathering operations. Also
called dozer.
A quarry blasting hole, the bottom of which has been enlarged or chambered
to receive a heavy explosive charge. See also:chambering
Nelson
a. A small, lustrous, nearly spherical industrial diamond. Long
b. A conical-nosed, cylindrical weight, attached to a wire rope or line,
either notched or seated to engage and attach itself to the upper end of
the inner tube of a wire-line core barrel or other retrievable or
retractable device placed in a borehole. Syn:bug; go-devil; overshot.
Long
c. A bullet-shaped weight or small explosive charge dropped to explode a
charge of nitroglycerin placed in a borehole. Long
a. A toothed driving wheel that is the largest or strongest in the
mechanism. Nichols, 1
b. A gear or sprocket that is much larger than the others in the same
power train. Nichols, 1
Trade name for an International (formerly Bucyrus-Erie) angling bulldozer.
Nichols, 1
Fragments of country rock enclosed in a mineral vein. Arkell
The firing of explosive charges in the cracks of loosened rock. The clay
stemming is forced around the charge by a bulling bar.
See also:bulled hole
A triangular, sharp-pointed shovel used in ore dressing. Also called
vanning shovel. Fay
a. A concretion found in some types of coal; composed of carbonate or
silica stained by brown humic derivatives; often a well-preserved plant
structure forms the nucleus. Also called coal ball. AGI
b. Lanc. Nodule of clay ironstone, pyrite, shale, etc., that generally
enclose a fossil.
c. Refined gold or silver, uncoined, in the shape of bars, ingots, or
comparable masses. ASM, 1
Refined gold or silver in the form of bars of convenient sizes and weights
for handling and storage. Henderson
Bullion (gold or silver) weight in a parcel of mineral or metal changing
hands. The major value is that of the carrier (e.g., argentiferous lead),
but payment is made both for this and for the precious metal.
Pryor, 3
Usually the largest ladle in a foundry.
Large clusters of diversely oriented and partially intergrown crystals of
muscovite with a little interstitial albite and quartz. Skow
A noncoring bit having a convex, half-hemispherical-shaped crown or face.
Also called wedge bit; wedge reaming bit; wedging bit.
See also:plug bit
A worthless mining claim.
White massive quartz, essentially free of accessory minerals and valueless
as ore. Syn:bastard quartz; buck quartz. AGI
A nodule of pyrite in roofing slate.
A tuyere discharging in the center of a hemispherical plate.
Standard, 2
A shaking chute where large coal from the dump is cleaned by hand.
Zern