Design of underground mining operations, in its preliminary stages, requires obtaining geomechanical data from re-logged rock core initially drilled for mineral exploration. The degree of alteration of this core due to handling and storage time increases the uncertainty in the geotechnical parameters assessed and in the estimated required excavation support. This paper presents a simple approach to quantitatively assess this uncertainty, illustrated with a case study in the Peruvian Cordillera. The Q-System was adopted for a preliminary assessment and to estimate the required excavation support.
Macciotta, R., G. Parkinson, E. Garcia, and O. Bravo. 2014. “Empirical Design of Underground Excavation Support: Assessing Reliability Associated with Rock Mass Classifications Using Core Drilled for Mineral Exploration,” in 1st International Conference on Applied Empirical Design Methods in Mining, June 9-11, 2014. Lima, Peru.
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