CABLE ANCHOR FOR SUPPORT OF MINE WORKINGS Russian patent published in 2009 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: here is disclosed cable anchor for support of mine workings. The cable anchor consists of load carrying core made out of a cable, at one end of which there is a lock, while on another end there is a clutch with a pipe of a sealing device and a sealing element, arranged on the said pipe, enveloping the cable with an air withdrawing tube let through a gap between the cable and the wall of the sealing device beyond borders of the sealing element and with outlet through a hole in the side wall of the sealing device pipe outside. The sealing element is made out of a set of flexible rings installed in circular grooves on the pipe of the sealing device; external diametre of rings exceeds by 1-5 mm diametre of a borehole, also pass-through section of the air withdrawing tube communicating with open air is sealed from the cavity of the sealing device pipe. A rigid ring is installed before the first flexible ring on the sealing device pipe; the diametre of the rigid ring has external diametre less, than diametre of the borehole.

EFFECT: simplification of design of cable anchor and increased efficiency of borehole sealing.

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