Blasting in sublevel caving
DOI:
https://doi.org/10.5281/zenodo.10121640Keywords:
sublevel caving, blasting, crater effect, rock fragmentation, explosivesAbstract
In sublevel caving, blasting operates under confined conditions, with the fragmented rock bordering the blasted stope and therefore setting unique blasting environment. The deformation resistance of this broken rock plays a crucial role, affecting blasted rock fragmentation and subsequent processes. This article explains the impact of the broken rock (confinement) on the formation of blast-induced fractures due to its inherent deformation. Additionally, strategies to circumvent the negative crater effect at the sublevel drift are discussed. Conversely, when appropriately utilized at the stope's upper side, this effect can lead to reductions in drilling and explosive consumption.
References
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