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Block model approach for analysis of rock bench stability in open pit mines

Asof, Marwan and Gofar, Nurly (2010) Block model approach for analysis of rock bench stability in open pit mines. Malaysian Journal of Civil Engineering , 22 (1). pp. 119-132. ISSN 1823-7843

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Wedge failure analysis conventionally adopted for the design of global angle of open pit mines is not always applicable when the area consists of jointed rock benches. In this analysis, the unstable wedge is assumed intact while, in fact, the rock bench consists of an assemblage of blocks generated by the intersections of well-defined discontinuities. Block model approach adopted in Resoblok provides an alternative solution for the design and stability analysis of a rock bench. The model analyzes the stability of individual block by limit equilibrium method while the discontinuity aspect is considered statistically based on geometrical modelling of the individual fractured rock mass. This paper presents the stability analysis of five rock benches from two mining sites. The analysis shows that Resoblok model provides a good indication of the distribution, the number and the volume of unstable blocks; therefore, it is useful for the design of open pit mines. The result of this study is in good agreement with field observation.

Item Type:Article
Uncontrolled Keywords:block model, bench stability, discontinuities, geometrical model, geomechanial model, unstable block volume, resoblok
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:25908
Deposited By: Liza Porijo
Deposited On:15 Jun 2012 17:00
Last Modified:02 Mar 2014 11:49

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