Abstract
Rock fragmentation is vital in a sublevel caving operation. The oversize fragments are the most undesired fragmentation category because of their challenges; as such, they require special attention. This study carried out a field test in one of the LKAB’s iron ore mines in northern Sweden to analyse the occurrence of oversize fragments. The analysis involved correlation and regression tests and was performed for different types of rock masses. The results showed that an increase in the percentage of solid rock mass caused an increase in the percentage of oversize fragments. The other rock types, including slightly fractured, highly fractured, and rock mass with minor and major cavities, tended to have a reduced percentage of oversize fragments. The results indicate that oversize fragments can be predicted using linear regression or partial least square regression models with R2 values of 0.78 and 0.73, respectively.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Rock Mechanics and Mining Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
