coal dust
Fine particles of coal produced during mining, transport, or handling. Often discussed in the context of explosions or respiratory hazards.
Water spray systems are installed in the mine to prevent coal dust explosions.
coal dust explosion
Standard kanji spelling.
Mixed kanji-kana spelling; 塵 is a non-jōyō kanji, so this form is sometimes used for readability.
Compound of 炭 (coal) and 塵 (dust).