Carries the men into and out of the mine.
The side of an excavation.
To mine coal from pillars.
A workman who lubricates and maintains the rollers and
pulleys over and through which haulage cables pass.
Strata immediately over a coal seam; rock or coal over
head in any excavation.
A system of mining in which the distinguishing feature
is the winning of fifty percent or more coal in the first
working. The coal is mined in rooms separated by narrow
ribs or pillars. The coal in the pillars may be won by
subsequent workings. The rooms are driven parallel with
one another, and the room faces may be extended, at right
angles or at an angle to the dip. This method is applicable
to flat deposits, such as coal, that occur in bedded deposits.