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Substantial amounts of methane-rich gas are trapped and adsorbed within coal formations, and are unavoidably desorbed in association with coal mining.In some cases of sub-surface mining, a formation is permeated with boreholes prior to and/or during extraction work, and the so-called firedamp gases allowed to vent as a safety measure.
Damp is the collective name given to all gases (other than air) found in coal mines in Great Britain and North America. [1]As well as firedamp, other damps include blackdamp (nonbreathable mixture of carbon dioxide, water vapour and other gases); whitedamp (carbon monoxide and other gases produced by combustion); poisonous, explosive stinkdamp (hydrogen sulfide), with its characteristic rotten ...
A strong release of firedamp occurred, which was mitigated by the installation of a fan and ventilation pipes. But this system proved ineffective, and the gas began to accumulate in the workings, which had been abandoned for two years, 50 meters from the shaft [2]. The Saint-Louis coal mine
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.
Mar. 26—The skies above New Mexico's oil and gas fields are often lit up by hundreds of flares burning off natural gas. But not for long. Routine venting and flaring of natural gas in New Mexico ...
The hydrogen sulphide is highly toxic, but easily detected by smell. The other gases with it may be firedamp or blackdamp. Afterdamp – The gas from an explosion of firedamp or coal dust. Contains varying proportions of blackdamp and whitedamp and is therefore suffocating, toxic, or explosive, or any combination of these.
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