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Firedamp is any flammable gas found in coal mines, typically coalbed methane. [1] It is particularly found in areas where the coal is bituminous . The gas accumulates in pockets in the coal and adjacent strata and when they are penetrated the release can trigger explosions.
Firedamp. Firedamp is explosive, flammable gas consisting predominantly of methane. [1] Fitter. A fitter is a worker responsible for the maintenance of underground ...
A firedamp whistle (German: Schlagwetterpfeife) is an instrument for the prophylactic indication of firedamp — flammable gases often present in coal mines.
The term is etymologically and practically related to other terms for underground mine gases—such as firedamp, white damp, and black damp, with afterdamp being composed, rather, primarily by carbon dioxide, carbon monoxide and nitrogen, with highly toxic stinkdamp-constituent hydrogen sulfide possibly also present.
Firedamp – Naturally occurring flammable mixtures, principally methane. Blackdamp or Chokedamp – Nitrogen and carbon dioxide with no oxygen. Formed by complete combustion of firedamp or occurring naturally. Coal in contact with air will oxidize slowly and, if unused workings are not ventilated, pockets of blackdamp may develop.
Mining accidents can occur from a variety of causes, including leaks of poisonous gases such as hydrogen sulfide [2] or explosive natural gases, especially firedamp or methane, [3] dust explosions, collapsing of mine stopes, mining-induced seismicity, flooding, or general mechanical errors from improperly used or malfunctioning mining equipment (such as safety lamps or electrical equipment).
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A strong release of firedamp appeared, which was mitigated by the installation of a fan and ventilation pipes. However, this system proved ineffective and the gas became lodged in workings that had been abandoned for two years, 50 meters from the shaft. [9] On 10 April 1824, the first explosion due to firedamp occurred in the Ronchamp coalfield.