By Ernesto Villaescusa, Yves Potvin
The function of floor help is to securely continue excavations for his or her anticipated lifespan. The effectiveness of flooring aid might be noticeable either when it comes to group of workers and gear security, and by way of permitting the main fiscal extraction. Scientists, practitioners and know-how builders have contributed to this quantity, which covers rock mass characterisation, open pit mining and tunnelling. The tools defined contain modelling and dynamic trying out, whereas overseas case reviews offer abundant representation of either mess ups and triumphs in floor support.
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Extra resources for Ground Support in Mining and Underground Construction: Proceedings of the Fifth International Symposium on Ground Support, Perth, Australia, 28-30 September 2004
However, if the strand is un-tensioned prior to grouting, the wire must be uniformly packed. g. Hyett et al. 1995). 5 Axial elongation capacity of steel strand The axial strain capacity of reinforcing elements is also addressed by standards. 5%. It is important to note that a reinforcing element for use in reinforced concrete is required to satisfy a minimum elongation that is 7 times more than the minimum ultimate elongation required of a pre-stressing element. Prestressed concrete and ground anchors do not require high elongation characteristics of elements because in these disciplines the structure is designed to operate at low levels of deformation with strands arranged to operate ‘well below’ yield (A in Figure 2).
Potvin (eds), Ground Support 2004, Proc. 5th Int. Symp. Ground Support in Mining & Underground Construction, Perth, 28–30 September 2004 (this volume). Lisse: Balkema. Jing, L. 2003. A review of techniques, advances and outstanding issues in numerical modelling for rock mechanics and rock engineering. International Journal of Rock Mechanics & Mining Sciences, 40(3):283–353. Kovari, K. 2001. The control of ground response—milestones up to the 1960s. Colombo (eds), Proc. AITES-ITA World Tunnel Congress, Milan, 1: 93–118.
Dynamic testing of reinforcement systems to control rockbursts. Potvin (eds), Ground Support 2004, Proc. 5th Int. Symp. Ground Support in Mining & Underground Construction, Perth, 28–30 September 2004 (this volume). Lisse: Balkema. Potvin, Y. & Nedin, P. 2004. Controlling rockfall risks in Australian underground metal mines. Potvin (eds), Ground Support 2004, Proc. 5th Int. Symp. Ground Support in Mining & Underground Construction, Perth, 28–30 September 2004 (this volume). Lisse: Balkema. S. 1975.