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Assessment of Rock Slope Stability and Factor Analysis with a Consideration of a Damaged Zone

손상대를 고려한 암반사면 안정성 평가 및 인자분석

  • Received : 2014.04.18
  • Accepted : 2014.06.11
  • Published : 2014.06.30

Abstract

After excavation or blasting, rock properties within an excavation damaged zone can be perpetually weakened on account of stress redistribution or blasting impact. In the present study, the excavation damaged zone is applied to a rock slope. The objective of this research is to compare the mechanical stability of the rock slope depending on the presence of the damaged zone using 2-dimensional modeling and analyze factors affecting factor-of-safety. From the modeling, it was founded that the mechanical stability of the rock slope is significantly dependent on the presence of the damaged zone. In particular, factor-of-safety with a consideration of the damaged zone decreased by approximately 49.4% in comparison with no damaged zone. Factor analysis by fractional factorial design was carried out on factor-of-safety. It showed that the key parameters affecting factor-of-safety are angle of the slope, cohesion, internal friction angle and height.

Keywords

Damaged Zone;Mechanical Stability;Factor-of-safety;Design of Experiment;Fractional Factorial Design

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Acknowledgement

Supported by : 인하대학교