In mining and in the quarry industry, a person who operates one or a
battery of pumps to force excess water from a lower level to the surface
or to a drainage tunnel. Also called: pitwright; plugman. DOT
In an airlift, the distance from the surface to the level of the water
during pumping; it equals static head plus drop. Lewis
The shaft containing the pumping machinery of a mine. Standard, 2
A convex perforated diaphragm fixed at the bottom of a pump tube to
prevent the entrance of foreign matter; a strainer. Fay
a. The vertical distance that a pump can suck up water. Theoretically,
this should be about 34 ft (10.4 m) at sea level; practically, the limit
is about 26 ft (7.9 m). Long
b. The vertical distance a pump can force water to flow. Long
The back pressure and/or resistance to flow of fluids that a pump must
overcome to force a fluid to flow through a pipeline, drill string, etc.
Long
The force per unit area or pressure against which a pump acts to force a
fluid to flow through a pipeline, drill string, etc.; also, the pressure
imposed on the fluid ejected from a pump. Long
The rod or system of rods (usually heavy beams) connecting a steam engine
at the surface or at a higher level with the pump piston below.
See also:balance bob
Scot. Spear plates; strips or plates of iron bolted to wooden pump rods at
the joints for the purpose of making the connection. Fay
Leakage past the valves and the plunger in a reciprocating pump, which
should not be greater than 2% or 3% for a pump in good condition.
Lewis
A slope in which pumps are operated. Fay
a. In mining, a chamber near the shaft at depth, where a pump is
installed. Pryor, 3
b. An enlargement made in the shaft, slope, or entry to receive the pump.
Also called pumproom.
c. The site at which one or more pumps are installed along a pipeline for
the purpose of forcing a fluid through the line. Long
Lanc. See:pump tree
A tank into which fluids gravitate and from which they are recirculated by
means of a pump. BS, 5
The pulsating effect transmitted to a pipeline or drill string at the
completion of each compression stroke of a reciprocating-piston pump.
Long
Eng. A cast-iron (wrought iron was formerly used) pipe, generally 9 ft
(2.7 m) in length, of which the water column or set is formed.
Syn:pump stock
a. A tool (ram) for knocking out timbers in coal workings.
Standard, 2
b. See:leg; punch prop.
Thin plates through which holes have been punched. These may be round,
rectangular, or slotted. Pryor, 3
An early-model pick machine used to undermine or shear coal by heavy blows
of sharp steel points attached to a piston driven by compressed air.
Fay
If a heavily loaded column punches a hole through the base on which it
rests, the base has failed in punching shear. This is prevented either by
thickening the base or by enlarging the foot of the column so as to ensure
that the allowable shear stress is not exceeded. Hammond
a. Mining in which the rooms are opened off the strip mine highwall.
USBM, 3
b. An underground method of extracting coal from finger-shaped areas of
reserves not amenable to other mining methods. Openings are driven by
continuous mining machines back and forth across the fingers from outcrop
to outcrop leaving a pillar of coal between each cut.