METHOD FOR SUPPORT OF MINE WORKINGS Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: method for support of mine workings includes installation of frames of arch support, laying of flexible shells in space between support over working arch perimeter, roof lagging and partial filling of hollows behind support with cementing compound. Placed on support upper members are strips of water-proof material with pockets at the ends. Airtight flexible shells are placed between frames in space behind support of working arch. In spaces between airtight flexible shells inflated with compressed air is injected cementing compound. After hardening of cementing compound air is released from airtight shells and they are withdrawn for repeated use. EFFECT: higher stability of working. 4 dwg