MEGABolt Water Expandable Rock Bolt (ERB)

The MEGABolt ERB range features friction bolts with superior product characteristics tomeet the most demanding roof support applications. The high load bearing capacity combined with excellent elongation properties ensure safer working conditions and faster excavation cycles for low costs. Reinforcement with ERB occurs by hydroforming (i.e. expanding) the bolt with high pressure water against a drill hole wall. ERBs expand into the shape of the hole when water at high pressure is pumped. The bolt expands to create a friction and interlocking anchor. MEGABolt’s ERB provide immediate full load bearing capacity with safe and easy installation. Installation is easy and flexible to fit various drill hole diameters. MEGABolt ERB consists of folded steel tube with upper bushing and inflation bushing welded at each end of the tube. A specially designed adjustable face plate is delivered as an option. ERB requires steel with extremely good elongation and formability properties. This produces a finished bolt that will be able to accommodate large rock movements and still maintain its high load bearing capacity. The MEGABolt ERB delivers a high level of safety and uninterrupted production in the customer’s operations. High quality steel guarantees homogenous material for MEGABOLT ERB, Expandable rock bolts. Expandable rock bolts are manufactured from unique steel in the Nordics. Each production stage from steel manufacturing to profiling and assembling of rock bolts belongs to partners own production and quality control chain. Quality control secures that the product is regularly tested to guarantee quality and safety. Each individual ERB is marked with a unique code, which enables full traceability of the bolts.