FLEXIBLE ANCHOR Russian patent published in 2001 - IPC

FIELD: mining industry. SUBSTANCE: flexible anchor may be used in bolting of mine workings when required length of anchor exceeds mine working height. The flexible anchor has a load-carrying rod with supporting members on anchor head and tail end with wedge. Tail part of anchor has a distance sleeve with nut on its male thread connected, for instance, by means of thread connection to supporting sleeve whose opposite end is connected by means of thread with nut supporting wedge made in the form of pusher with balls located between load-carrying rod, surface inclined radially to cylindrical axial hole of supporting sleeve and surface of pushers in periphery direction. EFFECT: provision of prestressing of flexible anchor of deep location just after installation. 3 cl, 3 dwg