APPARATUS FOR CONSOLIDATING ROCK STRATA

The apparatus comprises a rock bolt having a threaded end 11 provided with a projecting tab 12. A tool is provided for spinning the bolt and has a hexagonal socket 22 for receiving a nut (not shown). At the bottom of the socket is a slot 26 for receiving the tab. The tool is rotated to cause simultaneous spinning of the nut and bolt to insert the bolt in a drilled hole and rupture a resin capsule in the hole. The tab 12 is fracturable at a predetermined torque caused by resistance as the resin sets, so that the nut is caused to rotate relative to the bolt to tighten the nut on the bolt against a rock face. <IMAGE>