Ground and rock reinforcement tools
Rock bolting systems
Swellex Expandable Manganese line system
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Swellex Expandable Manganese line system (54)
Since its introduction the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end. The Swellex Expandable Manganese line was designed specifically to address large stress changes occurring in some mining and tunneling projects. Made from a special steel alloy, these rock bolts receive a heat treatment to improve their mechanical properties. The Swellex Expandable Manganese line has a unique yielding behavior that can be achieved only with the proper steel manufacturing, which results in bolts that provide a high ultimate load with a large deformation capability. Swellex Expandable Manganese line system is also available in bitumen- and plastic-coated versions for corrosion protection.