The name applied to the violent evolution of combustible gases (usually
together with large quantities of coal dust) from a working face. The
occurrence is violent and may overwhelm the workings and fill the entire
district with gaseous mixtures. Roadways advancing into virgin and
stressed areas of coal are particularly prone to outbursts in certain
seams and faults often intersect in the area. See also:floor burst;
blow; bump. Roberts, 1
Nearer to the shaft, and therefore away from the face, toward the pit
bottom or surface; toward the mine entrance. The opposite of inby. Also
called outbyeside. Syn:out-over
a. The part of a rock formation that appears at the surface of the ground.
Webster 3rd
b. A term used in connection with a vein or lode as an essential part of
the definition of apex. It does not necessarily imply the visible
presentation of the mineral on the surface of the earth, but includes
those deposits that are so near to the surface as to be found easily by
digging. Fay
c. The part of a geologic formation or structure that appears at the
surface of the Earth; also, bedrock that is covered only by surficial
deposits such as alluvium. CF:exposure
outcropping. AGI
d. To appear exposed and visible at the Earth's surface; to crop out.
AGI
A special type of geologic map that represents only actual outcrops. Areas
without exposures are left blank. Stokes
See:outcrop
Rain and surface water that seeps downward through outcropping porous and
fissured rock, fault planes, old shafts, or surface drifts. AGI
That stroke of a Cornish pumping engine by which the water is forced
upward by the weight of the descending pump rods, etc.
All submerged lands lying seaward and outside of the area of lands beneath
navigable waters as defined in Section 2 of the Submerged Lands Act
(Public Law 31, 83rd Congress, 1st Session), and of which the subsoil and
seabed appertain to the United States and are subject to its jurisdiction
and control. Abbrev. OCS. See also:continental shelf
The outer or upper zone of the Earth's core, extending from a depth of
2,900 km to 5,100 km, and including the transition zone; it is equivalent
to the E layer and the F layer. It is inferred to be liquid because it
does not transmit shear waves. Its density ranges from 9 to 11 g/cm (super
3) . The outer core is the source of the principal geomagnetic field.
CF:inner core
Syn. for outside diameter. Long
A diamond set on the outside wall of a bit crown. Also called reamer;
reamer stone. Syn:outside stone; kicker stone. Long
a. Eng. A seam cropping out at a lower level.
b. The mouth of a stream or the outlet of a lake; esp. the narrow end of a
watercourse or the lower part of any body of water where it drops away
into a larger body. AGI
c. The vent or end of a drain, pipe, sewer, ditch, or other conduit that
carries waste water, sewage, storm runoff, or other effluent into a
stream, lake, or ocean. AGI
a. The act of laying out or expending. Webster 3rd
b. Something that is laid out; expenditure. Webster 3rd
c. The cost of equipping a mine and placing it on a producing basis.
Fay
An opening from a mine to the surface. Syn:upcast
a. An isolated mass or detached group of rocks surrounded by older rocks;
e.g., an isolated hill or butte. CF:inlier
b. Ore or favorable geologic indications distant from the main ore zone of
a district.
a. Bits and reaming shells having set inside or outside diameters greater
or lesser than those specified as standard. Long
b. A borehole the inside diameter of which is undersize or oversize.
Long
See:outby
a. The quantity of coal or mineral raised from a mine and expressed as
being so many tons per shift, per week, or per year. Nelson
b. The power or product from a plant or prime mover in the specific form
and for the specific purpose required. See also:concentration of output;
productivity. Nelson
c. Amount delivered; e.g., volume of a liquid discharged by a pump; volume
of air discharged by a compressor; horsepower delivered by a motor.
Long
d. Current or signal delivered by any circuit or device. NCB
e. The terminal or other point at which a current or a signal may be
delivered. NCB
Machine that prints information computed from its memory or store.
Pryor, 3
A shaft that transmits power from a transmission or clutch.
Nichols, 1
An outward extension of a frame that is supported by a jack or block. Used
to increase stability. Nichols, 2