Probabilistic-Based Stope Design Methodology for Complex Ore Body with Rock Mass Property Variability

This paper presents a probabilistic approach for optimizing stope design methodology whiletaking into consideration the variability in the rock mass properties. For this study, a complex orebody in aCanadian mine was used. Because of the variability in the rock mass properties of the orebody, it was notpossible to determine precisely, the values of geotechnical design input parameters and hence the need toutilize a probabilistic approach. Point Estimate Method (PEM), a probabilistic tool, was incorporated intonumerical analysis using FLAC3D to study the deformation magnitudes of various stope geometries todetermine the optimal stope geometry with a minimum ground control problem. Results obtained for thedistribution of the wall deformations and the floor heaves for each option of the stope geometry werecompared to select the best geometry to achieve the optimum stability condition. The methodologypresented in this study can be helpful in the process of underground mine planning and optimization incomplex orebody.Godkänd;2020;Nivå 0;2020-05-11 (alebob)