Parting
The layer of slate or stony coal that separates two benches
of a coal seam. |
Pavement
The bottom of the floor of any excavation. |
Peat
An unconsolidated deposit of semi-carbonized plant remains
of a water-saturated environment, such as a bog, and of
persistently high moisture content (at least 75%). It
is considered the early stage or rank in the development
of coal. |
Peat
Coal
A coal transitional between peat and brown coal or lignite. |
Piece
Can
The underground workman's lunch container, usually made
from sheet metal, with a tea can made from the same material. |
Pillar
A column or body of coal left unmined to support the roof. |
Pillard
and Bord
The name used to describe a mining method (i.e. coal is
extracted from the bords and left in the pillars). The
latter's extraction is the final mining process. |
Pit
A mine. |
Plane
An incline on which a track is laid on which to lower
or hoist coal. |
Powder
Explosive chemical in powder form used at the coal face
to blast. |
Prop
A wooden upright post to support the roof. |
Proximate
Analysis
Determines percentages of moisture (water), volatile matter,
fixed carbon and coal ash; also sulphur and heat value
in B.T.U. are reported. |
Pumpman
A workman who maintains and supervises a pump's operation. |
Pump
Way
The compartment of a shaft or slope down which pump rods
and pipes extend; also called pump slope and pump shaft. |
Punchers
Air-driven percussive pick machines. |
