Classification systems in slope stability analysis

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Presentation transcript:

Classification systems in slope stability analysis Slope Mass Rating (SMR) Chinese Slope Mass Rating System (CSMR) Rock slope rating (RSR) Slope stability rating (SSR) classification system Dump mass rating

Slope Mass Rating (SMR) SMR = RMR + (F1 .F2 . F3) + F4 The RMR is computed according to Bieniawski’s 1979 proposal, adding rating values for five parameters: Strength of intact rock; RQD (measured or estimated); Spacing of discontinuities; Condition of discontinuities; and Water inflow through discontinuities

Adjustment ratings for method of excavation (after Romana, 1995) F3 reflects the relationship between the slope face and the joint dip. F4 is a factor for the method of excavation. The adjustment factor for the method of excavation has been fixed empirically as follows: Adjustment ratings for method of excavation (after Romana, 1995) Method Natural slope Presplitting Smooth blasting Blasting or mechanical Deficient Blasting F4 +15 +10 +8 -8

Rock slope rating (RSR)

Slope stability rating (SSR) classification system