Charette, F & Plouffe, M 2007, 'Roofex® –Results of Laboratory Testing of a New Concept of Yieldable Tendon', in Y Potvin (ed.), Deep Mining 2007: Proceedings of the Fourth International Seminar on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 395-404, https://doi.org/10.36487/ACG_repo/711_28
(https://papers.acg.uwa.edu.au/p/711_28_Charette/)
Abstract: To provide the mining and tunnelling industries with a rock reinforcement fixture that is better suited to 
mining with high stress conditions, Atlas Copco has developed a new rockbolt that can accommodate both 
very large displacements and high energy release in the rock mass. The design principles that guided the 
development of the rockbolt are presented and discussed. For one, the Roofex® was designed to offer 
accurate pre-set load-deformation behaviour. This first model or prototype is based on a 12.5 mm diameter 
steel bar because of borehole diameter limitations.