Rockdust
IN MINING, APPLICATION OF PULVERIZED INERT ROCK MATERIAL SO TO CONTROL THE DUST EXPLOSION HAZARD IN MINES
Rock dust; Rockdusting; Rock dusting; Stone dust
Rock dust is a pulverized rock, usually lime stone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease.