Atlas Copco Rock Reinforcement Products Product
2017-11-14 · Swellex installation The Swellex bolt is a folded steel tube, which is inserted into a pre-drilled hole in the rock. Water is blasted into the tube at high pressure, blowing out the fold and expanding the tube into the exact shape of the hole, adapting to every irregularity. Bolt installation takes less than 30 seconds, and