An elastic wave in which the energy is confined to the surface or a narrow
region just below the free surface of an extended solid. These waves
readily follow the curvature of the part being inspected and are reflected
only from sharp changes of direction at the surface. ASM, 1
See:surface mining
Surface active agent, a substance that affects the properties of the
surface of a liquid or solid by concentrating in the surface layer.
Brantly, 1
Gr. Brit. Afterdamp or chokedamp; or pressure exercised by a pent-up gas
resulting in its escape with or without rupture of strata.
Tomkeieff
Pertaining to, or occurring on, a surface, esp. the surface of the Earth.
CF:subsurface
See:soil creep
Geology of surficial deposits, including soils; the term is sometimes
applied to the study of bedrock at or near the Earth's surface.
See also:surface geology
The area between the outermost breaker and the limit of wave uprush.
Syn:breaker zone
a. To move sideways; to fleet. Mason
b. The uneven rate of flow and regular variations in pressure caused by
time lags between pressure strokes on a piston-type pump. Long
c. In fluid flow, long-interval variations in velocity and pressure that
are not necessarily periodic and may even be transient. AGI
a. In salt mining, a generally large bin above the crusher into which the
mine-run salt is dumped prior to being discharged into the primary
crusher. A feeder at the bottom of the surge bin facilitates transfer of
the mine-run material to the crusher. Kaufmann
b. A compartment for temporary storage, which will allow converting a
variable rate of supply into a steady flow of the same average amount.
Nichols, 1
A large-capacity storage hopper, installed near the pit bottom or at the
input end of a processing plant to provide uniform feeding of material
from bulk deliveries. Surge bunkers are generally required either on the
surface or underground to act as a buffer between the shaft and the coal
preparation plant and the working faces. See also:bunker; surge hopper.
Nelson; Sinclair, 5
A hopper (bunker) designed to receive a feed at fluctuating rate and to
deliver it at some predetermined rate. Syn:surge bunker
Open-topped standpipe to release pressure from surge. Hammond
The pulley used on a tension carriage in endless-rope haulage.
See also:balanced direct-rope haulage
a. A standpipe or storage reservoir at the downstream end of a closed
aqueduct or feeder pipe, as for a water wheel, to absorb sudden rises of
pressure and to furnish water quickly during a drop in pressure.
Webster 3rd
b. An open tank to which the top of a surge pipe is connected so as to
avoid loss of water during a pressure surge. Hammond
c. In pumping of ore pulps, a relatively small tank that maintains a
steady loading of the pump. When new pulp is in short supply, a float
valve causes recirculation of part of the load, therefore avoiding
settlement. Alternatively, a float may vary the speed of the pump, vary
the rate of delivery to the tank, or divert the flow to a parallel system.
Pryor, 3
The flapping of a moving rope. See:whipping
An Icelandic term for a peatlike variety of brown coal or lignite
occurring in the Pliocene deposits and sometimes under the volcanic
overflows of Iceland.
a. The orderly and exacting process of examining and delineating the
physical or chemical characteristics of the Earth's surface, subsurface,
or internal constitution by topographic, geologic, geophysical, or
geochemical measurements; esp. the act or operation of making detailed
measurements for determining the relative positions of points on or
beneath the Earth's surface. AGI
b. The associated data or results obtained in a survey; a map or
description of an area obtained by surveying. AGI
c. An organization engaged in making surveys; e.g., a government agency
such as the U.S. Geological Survey.
d. See:borehole survey
e. To determine and delineate the form, extent, and position of (as a
tract of land, a coast, or a harbor) by taking linear and angular
measurements and by applying the principles of geometry and trigonometry.
Webster 3rd
f. A measured plan and description of a portion of an area or of a road or
line through an area obtained by surveying. Webster 3rd
g. The information plotted from a borehole survey. Long
a. The act or process of making a borehole survey.
See also:borehole survey
b. Specif., in civil engineering, the science or art of making such
measurements as are necessary to determine the relative position of points
on or beneath the surface of the Earth, or to establish such points.
Seelye, 2
c. The art of making a survey; specif. the applied science that teaches
the art of making such measurements as are necessary to determine the area
of any part of the Earth's surface, the lengths and directions of the
boundary lines, and the contour of the surface, and of accurately
delineating the whole on paper. AGI
d. The act of making a survey; the occupation of a person that surveys.
AGI
An instrument sensitive to ionizing radiations used in prospecting for
radioactive deposits. Webster 3rd
One who applies special knowledge and techniques gained through experience
or training to make surface and underground surveys at a mine, locating
himself/herself on the Earth's surface by taking instrument shots on the
sun or stars and making necessary calculations, surveying and calculating
the volume of material in dumps, carrying survey lines underground by
shaft plumbing (cord or wire with attached bob is suspended from the shaft
surface) and instrument shots taken on the bob at a shaft station,
controlling by underground surveys and calculations the driving and
connection of underground passages on and between various levels,
computing the volume of coal in portions of the mine from survey notes,
and drafting maps of the mine workings. Also called spud setter;
underground surveyor. Syn:mine surveyor