Fundamental Concepts Hangups in ore passes and underground storage silos due to the formation of stable obstructions such as domes, arches or ratholes can be eliminated or their frequency minimized by good design and operating practice.
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in December 2013. Mobilisation is expected in the March Quarter 2014 with work expected to be completed by the end of CY2015. Work continued on ing progressmajor work packages including supply, raw site power water supply and construction accommodation. Tenders are
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Ore Pass Systems in Quebec Underground Mines the resulting hangups are more likely attributed to 100 the creation of cohesive arches. In practice, transitional behaviour coarse to fine distributions is difficult to quantifY. ing to push the block thr,mg.!:L the bars with the bucket. This
Geotechical assessment deficiencies in underground
Damage to underground structures results from over or underestimating the rockmass properties or mininginduced stress. The analysis of damage reports is a valuable source for future planning and design. This type of deficiency may result in damage vary ing from minor deterioration to catastrophic failures. Steel arches are widely