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Stability Assesment

Deterministic stability analyses of a rehabilitated pit wall slope at Coedmore Quarry, Durban

K. Naidoo, B. R Jones, E.D.C Hingston. 2011.

Proceedings of the 12th ISRM International Congress on Rock Mechanics, 12th ISRM Congress, Taylor & francis, London.


Coedmore Quarry's on-going rehabilitation programme involved the tipping of waste rock over final highwall's. However, this was stopped as it was a concern that it might prove to be a geotechnical hazard. The stability analysis was based on kinematic observation that failure would occur as a translational slip of cohesionless waste rock material.



Rehabilitation treatment


Pit wall slope Index ​ The stability analysis was based on kinematic observation that failure would occur as a translational slip of cohesionless waste rock material. This type of failure lends itself to the infinite slope stability model. A pseudostatic analysis was conducted to account for the impact of blast induced acceleration. Results indicated that at mean shear strength values with an angle of internal friction of 37°, the slope is stable.


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