The practicality of using rock mass classification in a narrow tabular orebody at depth
DOI:
https://doi.org/10.17159/Abstract
In the challenging environments of deep-level, narrow tabular orebody gold mines in South Africa, rock mass classification offers a potential method for predicting hazardous areas and optimizing rock support systems. This study evaluates the applicability of various rock mass classification systems, with a focus on the Modified/Mining Rock Mass Rating (MRMR) system tailored for high-stress, deep-level mining conditions. Extensive data collection was conducted at Kusasalethu Mine, involving underground mapping and analysis of the 2020/2021 fall of ground database. The MRMR system was adapted to the unique geological and operational conditions, providing a simplified, user-friendly approach for rock engineering and geology personnel. Results indicate that this adapted MRMR system effectively quantifies rock mass conditions and influences proactive mining adjustments. The study's findings highlight the system's capability to enhance understanding of rock mass behaviour and substantially mitigate the occurrence of rockfalls and ground collapses. Further application and refinement of the system are recommended to continuously improve mining safety and efficiency.
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Copyright (c) 2026 Ross van Heerden, Professor
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