Research Information System
15th ISRM Congress 2023 & 72nd Geomechanics Colloquium, Salzburg, Austria, 9 - 14 October 2023, vol.1, pp.1923-1928, (Full Text)
Excavation-induced stresses have the potential to trigger instabilities around underground openings due to disturbance of the pre-mining stress field. Production sequence is a critical aspect in underground mining as it controls the stress distribution in the rock mass. The cutand-fill mining method requires consideration of the mining sequence to mitigate the instability risk due to excessive stress concentration in stopes scheduled for production. This study covers the effects of production sequence on the crown pillar and the global mine stability using numerical modeling. A transition from open pit to underground mining in Western Türkiye was investigated. The orebody is a long-narrow vein type steeply dipping metallic mineralization that has three uniformly striking sub-sections. 2D and 3D elastoplastic models were used to examine the crown pillar deformations in alternative production scenarios. Large-scale effects of producing the orebody sub-sections in various orders were studied considering the global mine stability.