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Consideration of the rock mass property variability in numerical modelling of open stope stability
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-9766-0106
2012 (English)In: Föredrag vid Bergmekanikdag i Stockholm, 12 mars 2012, Stockholm: Stiftelsen bergteknisk forskning - Befo , 2012, 111-123 p.Conference paper, Published paper (Other academic)
Abstract [en]

This paper presents a probabilistic approach for modelling complex rock masses wherethe intrinsic properties are highly variable. For this study a complex orebody in aCanadian mine is used. The mechanical properties of the host rock and the ore in thismine are found to be intrinsically variable with high contrast between their mechanicalproperties. It is apparent that the use of traditional deterministic methods to study thebehaviour of the open stopes is not appropriate for this mine. Hence, in this study aprobabilistic approach is adopted which allows the propagation of the variability of theinput parameters in the numerical modelling. Three different approaches were used toanalyze the stability of the open stopes based on the distribution of the different materialproperties of the rock mass. The results of the analysis using the three methods werecompared and the limitations and the potentials of each of the methods were discussed.The study provides insight into the significance of the rock mass property variability inthe numerical modelling of open stope stability and different ways that it could beincorporated into the modelling.

Abstract [sv]

Denna artikel presenterar en sannolikhetsbaserad ansats för analys av komplexa bergmassor med stor variation i mekaniska egenskaper, i detta fall bergmassan i en kanadensisk gruva. Det är också en stor skillnad mellan sidobergets och malmens mekaniska egenskaper. Det är uppenbart att traditionella deterministiska metoder inte är lämpliga för att studera brytningsrummens beteende i denna gruva. Därför har en sannolikhetsbaserad ansats använts vilken gör att man kan ta hänsyn till variationen i indata vid numerisk analys. Tre olika statistiska metoder användes vid stabilitetsanalysen av brytningsrummen. Resultaten jämfördes där fördelar och begränsningar diskuterades. Studien illustrerar vikten av att ta hänsyn till variationen i bergmassans egenskaper vid analysen av brytningsrummens stabilitet.

Place, publisher, year, edition, pages
Stockholm: Stiftelsen bergteknisk forskning - Befo , 2012. 111-123 p.
Series
Bergmekanikdag Stockholm, ISSN 0281-4714
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-28157Local ID: 1dc12f87-31ce-4f1e-a3d1-8f0cf6fd0ed1OAI: oai:DiVA.org:ltu-28157DiVA: diva2:1001352
Conference
Bergmekanikdag 2012 : 12/03/2012 - 12/03/2012
Note
Godkänd; 2012; 20120328 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-10-20Bibliographically approved

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