Geomechanics and Engineering

  • 제15권1호
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  • Pages.669-676
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Numerical analysis of a complex slope instability: Pseudo-wedge failure

  • Babanouri, Nima (Department of Mining Engineering, Hamedan University of Technology) ;
  • Sarfarazi, Vahab (Department of Mining Engineering, Hamedan University of Technology)
  • 투고 : 2016.08.21
  • 심사 : 2017.11.20
  • 발행 : 2018.05.20
⟨ 이전 논문 다음 논문 ⟩

초록

The "pseudo-wedge" failure is a name for a complex instability occurring at the Sarcheshmeh open-pit mine (Iran). The pseudo-wedge failure contains both the rock bridge failure and sliding along pre-existing discontinuities. In this paper, a cross section of the failure area was first modeled using a bonded-particle method. The results indicated development of tensile cracks at the slope toe which explains the freedom of pseudo-wedge blocks to slide. Then, a three-dimensional discrete element method was used to perform a block analysis of the instability. The technique of shear strength reduction was used to calculate the factor of safety. Finally, the influence of geometrical characteristics of the mine wall on the pseudo-wedge failure was investigated. The safety factor significantly increases as the dip and dip direction of the wall decrease, and reaches an acceptable value with a 10-degree decrease of them.

키워드

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