CABLE ANCHOR Russian patent published in 2009 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: cable anchor consists of load carrying cable with air exhaust tube; load carrying cable is connected to coupling in its axial hole; also sealing device tube is connected to coupling; sealing device tube envelopes cable and air exhaust tube and contains flexible bushing of sealing device. A circular groove is cut on the tube from its external side; the groove is deepened with an additional circular groove with through holes shut-off with a back valve in form of a flexible bushing, external surface of which together with the circular groove is concentrically enveloped by the external flexible bushing, the ends of which are pressed out with clamps. An additional hollow bushing with a plug is installed from the internal side of the sealing device tube at its end in a gap between the cable and the tube; also the gap between the cable and the tube of the sealing device at its end is shut with a bridge enveloping external surfaces of the cable, additional bushing and air exhaust tube.

EFFECT: reliable device for sealing head of borehole in anchor of self-ampoule-pressurising method of fastening.

3 dwg