METHOD FOR ERECTION OF WALL OF UNDERGROUND STRUCTURE Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: method includes driving of closed working over contour of wall of underground structure at its roof. One wall of working from inner side of structure is made square to floor, and the other, on the side of rock mass 5 at angle relative to horizontal plane. Working is divided by vertical forms 6 which are installed at distance equalling thickness of wall of underground structure measured from point of intersection of working inclined wall with its roof. Then, space behind forms is filled with cementing mortar 7. After its hardening, using the same procedure, underlying working is driven and filled with cementing mortar. Underlying working has roof width and side walls inclination equalling those of overlying working. EFFECT: higher efficiency. 4 dwg