By Ernesto Villaescusa
The 1st finished paintings on probably the most very important underground mining equipment around the globe, Geotechnical layout for Sublevel Open Stoping provides themes in response to the traditional sublevel stoping approach utilized by such a lot mining homes, within which a sublevel stoping geometry is selected for a specific mining approach, apparatus availability, and workforce experience.
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Additional info for Geotechnical Design for Sublevel Open Stoping
A review of sublevel stoping, in G. , Proceedings of the MassMin 2000, Brisbane, Queensland, Australia, October 29 to November 2, 2000, pp. 577–590, AusIMM, Melbourne, Victoria, Australia. ) the limited drilling length achieved, and the inability to match the burden drilled for the production ring holes immediately above. Because the TUC rings are drilled with a different burden to the production rings, the lower portion of a stope is usually blasted ahead of the main rings. This leads to a moderate undercutting of the main rings, which can lead to falloff, especially in cases where large geological discontinuities are present or in regions of high stress redistribution.
The method requires very good control of the stope back and brow stability, especially in a highly stressed environment. Stress redistribution due to the stoping sequence itself can create significant back failures, especially if shallow dipping discontinuities are present within a rock mass. 16 shows a typical extraction configuration using single-lift stopes at the Williams Mine in Canada, where several major rockfall occurrences within the sill pillar have been reported by Bawden et al. (2000).
Furthermore, some mining practitioners and junior consulting engineers may find the book useful. 1 Introduction In sublevel stoping, ore is broken by drilling and blasting. Stope access is achieved by mining drilling and extraction drives, which can be accessed either transversally or longitudinally with respect to the orebody strike. The first stage is to create a slot between the vertical horizons defining the planned stope. This is achieved by enlarging a suitably located raise or longhole winze (LHW).