Miners have given this nickname to a dangerous g petrified plant remains that increases the risk of roof falls in underground coal mines.
Mixture of carbon dioxide and nitrogen s that can build-up in mines causing poisoning, asphyxiation, and ultimately death if left untreated.
A roof support of props timbers or ties, laid in alternate cross layers.
wages are a trifle over $10 a week for six full days
the exposed area of a coal bed.
A carrier of miners, to and from the work area.
A gas produced by bacteria from hydrogen and carbon dioxide which is potentially explosive
A primary opening though mine strara used for ventilation.
carbon monoxide, CO
A coal mine cave-in especially in permanent areas such as entries.
using a pick to cut a4 feet so coal can fall after the blast
columns of coal. to help hold roof
canaries in the coal mine
An early warning of a serious problem at hand
miners payment instead of cash
a bed of coal usually thick enough to be profitably mined
open doors for coal cars
gathered the loaded mine cars from the various rooms and delivered empties
�Used to prop and hold the roof top in a mines