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Performance of the Swellex bolt in hard and soft rocks. Chunlin Li, U. Håkansson. Published in Rock Support and… 8 October 2018. Engineering, Geology. Rock Support and Reinforcement Practice in Mining. In general Swellex bolts strengthen the rock mass through a combination of friction and mechanical interlock at the rock-bolt interface.
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type of inflatable rock bolt, called the Swellex, was in-vented in the 1980s (Wijk and Skogberg 1982). A few other types of inflatable rock bolts have appeared on the market in recent years, for example, the Omega (Player et al. 2009) and the EX300 ERB (Bjurholt 2007). Inflatable rock bolts have been used for rock support, particularly in
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Swellex ® The Swellex rockbolt is a sealed steel tube folded on itself which upon installation is expanded with high water pressure offering strong performance and interaction with rock mass, assurance of perfect installation for every bolt and quick installation. The extensive application range, speed and quality
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Swellex is a typical inflatable rock bolt, interacting with the rock mass through the friction between the cylindrical surface of the bolt and the wall of the borehole (Li and Håkansson.
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SWELLEX PM12 Swellex rock bolts General information Swellex Pm12 Minimum breaking load 110 kN Minimum yielding load 90 kN Minimum elongation 10% Expansion pressure 300 bar For further information, see also technical data page 7. Minimum elongation "A": According to EN-ISO 6892-1 where applicable. Swellex Pm12 rock bolts Size Length (m) Weight (kg)
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7 Swellex rock bolts Swellex load capacity Description Minimum breaking load, expanded profile (kN) Minimum yielding load, expanded profile (kN) Minimum elongation "A5" (%) Profile diameter (mm) Material thickness (mm) Original tube diameter (mm) Injection bushing diameter (mm) Bushing head (mm) Bore hole diameter (mm) Expansion pressure (bar) Pm12 110 90 10 28 2 41 28 30/37 32-39 300
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Three analytical models have been developed for rock bolts: one for bolts subjected to a concentrated pull load in pullout tests, one for bolts installed in uniformly deformed rock masses, and one for bolts subjected to the opening of individual rock joints.
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This unique rock bolt consists of a welded tube folded on itself, which is sealed at one end. The Swellex Expandable Premium line is engineered to provide safety and productivity in typical tunneling and mining environments.
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Swellex Rock bolt installation in tunnels abhishek chaudhary 262 subscribers Subscribe Subscribed Share 24K views 4 years ago The video shows the installation of Swellex Type rockbolt in.
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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. It is re-expanded using a high pressure water flow provided by a special pump and adapter.
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The Swellex rockbolt is a sealed steel tube folded on itself which upon installation is expanded with high water pressure offering strong performance and interaction with rock mass, assurance of perfect installation for every bolt and quick installation.
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The first type of inflatable rock bolt, called the Swellex, was invented in the 1980s (Wijk and Skogberg 1982). A few other types of inflatable rock bolts have appeared on the market in recent years, for example, the Omega (Player et al. 2009) and the EX300 ERB (Bjurholt 2007).