METHOD FOR FORMATION OF WORKING IN SOIL AND DEVICE FOR ITS REALIZATION Russian patent published in 1994 - IPC

FIELD: formation of workings in soil. SUBSTANCE: method consists in acting on face of working with jets of working fluid coming from inner space of working member at pressure which is augmented by supply of gaseous agent into inner space of working member. In this case, acted on working face are jets of gaseous agent. Device for formation of working in soil has working chamber, drive drum with flexible hose wound on it, working fluid supply source and gaseous agent supply source. Drive drum is located in working chamber. Free end of flexible hose is turned inside out and secured to outlet of working chamber. Supply sources of working fluid and gaseous agent are communicated with inner space of working chamber. EFFECT: higher efficiency. 2 cl, 2 dwg