…A general term for dust generated during mining of ores and coal, tunnel excavation, and other underground work. Coal dust is also called coal dust. There is no specific definition of the size of dust particles (particle size), but it usually refers to dust particles smaller than a few hundred microns. *Some of the terminology that mentions "coal dust" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…鉱石および石炭の採掘,坑道の掘進,その他坑内作業に伴って発生する粉塵の総称。石炭質粉塵は,別に炭塵coal dustと呼ぶ。粉塵としての粒子の大きさ(粒径)はとくに定義づけられていないが,普通は数百μm以下のものを指す。… ※「coal dust」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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