ROPE BOLT Russian patent published in 2010 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: rope bolt consists of twisted rope wire strands, sleeve for strand ends connection, restrainer of radial movement of rope wire strands between which there are areas of rope strand contact points disconnection with rigid inserts. The bolt has restrainer of uncured locking compound movement downwards the annular gap between the bolt and hole walls. Note that the restrainer of uncured locking compound movement is a bushing made of elastic material that is put on the bolt. The outer diametre of the bushing is taken equal or larger than hole diametre, the diametre of bushing axial hole is taken equal or less than bolt diametre, and the distance from the bushing to the hole face is indicated from mathematical expression.

EFFECT: increase of rope bolt bearing capacity at its ampoule method of fixing in a hole and decrease of expenses for roof bolting.

2 cl, 1 dwg