noun
firedamp
Technical mining term for flammable gas, primarily methane, found in coal mines.
炭鉱では爆発ガスの濃度を常に監視している。
In coal mines, the concentration of firedamp is constantly monitored.
メタンガス is the general term for methane gas, while 爆発ガス specifically refers to the explosive methane-air mixture in mining contexts.
Compound of 爆発 (explosion) and ガス (gas), literally 'explosion gas'. A direct calque or translation of the English mining term 'firedamp'.