DEVICE FOR FASTENING OF BOLT IN ROCK Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: device for fastening of bolt in hole made in rock has fastening member made in the form of widening bush with thread on inner end. Located on outer end of bolt is disk-like clamping member with nut which is used for clamping to rock. Bolt is provided with pipe passing through larger part of its length. Pipe is used for delivery of building mortar to inner end of hole made in rock and for displacing air from aforesaid hole. Supporting member has hole for delivery of building mortar, and convex stop on pressing member, thus ensuring connection between hose for delivery of building mortar and inner end of pipe. Supporting member can be made in the form of spherical shell with threaded hole for pipe which is provided with outer thread on its outer end. EFFECT: higher efficiency. 1 cl, 2 dwg