machine de creusage au jet

CONT: Les chercheurs ont établi les pressions et volumes d'eau nécessaires dans les machines de creusage au jet pour réduire les risques d'inflammation par frottement et la quantité de poussière inhalable.

CONT: Frictional Ignition Control. Frictional ignition continues to be a major problem when sandstone channels are encountered. Water jet assisted road headers, diamond insert pick trials, and thru-flush pick trials are attempts to reduce or control frictional ignition problems associated with drag-style bit cutting.
CONT: In eastern Canadian underground coal mines: ... Proper water pressures and volumes for water-jet roadheaders, which reduce the risk of frictional ignition and the amount of respirable dust, were established.