Neugebauer, E 2009, 'Roofex™ — a new flexible rockbolting concept', in PM Dight (ed.), Proceedings of the First International Seminar on Safe and Rapid Development Mining
, Australian Centre for Geomechanics, Perth, pp. 49-60.
Rock excavation in deep mines and unstable rock conditions presents special challenges for planners and
engineers looking to meet strict safety demands. A new innovation, the Roofex™ rockbolt, offers a significant
Wherever rock movements are unpredictable, geomechanical designers find themselves faced with the
difficult task of selecting a rock support system that will meet, and preferably exceed, today’s stringent
requirements. Whatever system is chosen, it is imperative that potential rock movement is controlled and that
tunnels and drifts are prevented from caving in.
The world markets persistent demand on raw materials as well the continuous need for infrastructure
expansion forces the industry to develop into more sensitive and violent underground environments. All this
has intensified the development of safety systems and new, unique solutions which can enable mining and
construction companies to go both further and deeper, without jeopardising safety. The Swellex rockbolt has
been providing stability in mining operations with great success since 1977. Now it is time for rock support
to move to the next level of safety, Roofex bolts.
Many mines wrestle with the fact that they are coming close to the end of the life of the mine, and that
driving a new level will involve unacceptable risks — and no one is prepared to gamble on safety. Against
this background, the new Roofex bolt can provide the solution. It is a unique rockbolt that can absorb rock
movements with excellent performance, as well as predictability. Roofex bolts are designed to address two
issues — either to dissipate the energy released during slow rock movement (static conditions) in weak or
broken rock under high stress, or to cope with larger, sudden rock movements during rockburst or seismic
activities. The Roofex bolt provides support for forces up to 80 kN before the sliding effect of the ingenious
frictional system comes into effect. At the load of 80 kN the bolt starts to slide along with the rock
deformation, slowly dissipating the energy of the rock along the preset sliding path.
Doucet, C. and Cote, M. (2008) Insitu Dynamic Testing of Roofex Bolts at Mine Doyon, CANMET MMSL Research
Report, Ver. October 2008.
Heal, D. and Potvin, Y. (2007) In-situ Dynamic Testing of Ground Support Using Simulated Rockbursts, Proceedings
of the 4th International Seminar on Deep and High Stress Mining 2007, Y. Potvin (ed), Australian Centre for
Geomechanics, Perth, Australia, pp. 373–394.
Jones, M. (2008) Thumbs up for Roofex — Iberpotash approves New Rockbolting Concept in Spain, Mining and
Construction 3–08, 2008, pp. 26–27.
Neugebauer, E. (2008) Ready for Roofex — A New Way to tackle Safety in Underground Operations, Mining and
Construction 3–08, 2008, pp. 24–25.
Plouffe, M., Anderson, T. and Judge, K. (2008) Dynamic Testing of Tendons (Roofex), CANMET MMSL Research