Quantifying the Influence of Variations in Rock Mass Properties on Stope Stability

Variations in rock mass properties are well-established mechanics and underground mining. The literature is replete with methods of assessing them determining values that used design or numerical analysis. In this paper, a simplified 3D model constructed for tabular orebody the Canadian Shield instability quantified using ”brittle shear ratio” criterion to calculate volume at risk. A 1-4-7 stope pillar sequence implemented on four active levels, three variations host formation assessed. It observed locations ore risk follow formations pillars then transferred sill above below. Instability footwall hanging wall be lesser but remains persistent. With allocation weak rock, at-risk volumes increase orebody, footwall, wall, reverse trend occurs strong greenstone properties. concluded stress due transfers from weaker while use lower compressive strength value.