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Rockburst Damage Characterization in a South African Gold Mine Subjected to High Horizontal Stresses
Sibanye-Stillwater Limited, Carletonville, South Africa.
Sibanye-Stillwater Limited, Carletonville, South Africa.
School of Mining & Geosciences, Nazarbayev University, Astana, Kazakhstan.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0003-1014-0405
2024 (English)In: 58th US Rock Mechanics/Geomechanics Symposium, American Rock Mechanics Association (ARMA), 2024, article id ARMA 24–0607Conference paper, Published paper (Refereed)
Abstract [en]

Rockburst risk can often be reduced by selecting appropriate mining or excavation methods, sequences, strategically placing developments, and other infrastructure. However, owing to the uncertainties in rock mass properties and boundary conditions, rock engineering design necessitates dependence on ground control measures reinforced with burst-resistant rock support to ensure safety at the workplace. High horizontal stress at depth aids the rockmass to be self-supporting by clamping the rockmass. It reduces the gravity-driven damages that could be experienced at the excavation, as stress-induced damages might become significant when mining goes deeper. Significant seismic events (ML≥0.9) are usually associated with large damages near any excavation in the underground workings. We analyzed the damage mechanisms of large mining-related seismic events (0.9≤ML0≤ 3.0) located within the shaft. The study indicates that with the large energy release, damages were only observed with fewer stopes. This is not only influenced by the high horizontal stresses but also by the rockmass mineralogical and contrasting geomechanical properties. The rockburst analysis within active mine infrastructure indicates that 63% large seismic events did not cause any damage to the mine infrastructure or cause injuries within the WAF.

Place, publisher, year, edition, pages
American Rock Mechanics Association (ARMA), 2024. article id ARMA 24–0607
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-108531DOI: 10.56952/ARMA-2024-0607OAI: oai:DiVA.org:ltu-108531DiVA, id: diva2:1888149
Conference
58th U.S. Rock Mechanics/Geomechanics Symposium, Golden, Colorado, USA, June 23-26, 2024
Available from: 2024-08-12 Created: 2024-08-12 Last updated: 2024-08-12Bibliographically approved

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Zvarivadza, Tawanda

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