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- Title
A General Solution for Estimating the Safety Factor of Bimslopes.
- Authors
Khorasani, Emad; Amini, Mehdi; Medley, Edmund; Tarigh Azali, Sadegh; Hossaini, Mohammad Farouq
- Abstract
Bimslopes are slopes underlain by block-in-matrix rocks/soils (bimrocks/bimsoils), which are heterogeneous geomaterials with complex behavior. Abundant uncertainties in the mechanical, spatial, and geological nature of bimslopes make it difficult to estimate stability conditions of bimslopes. In this paper, some factors affecting the stability of bimslopes are investigated using the finite-element method. The main contributory factors include Volumetric Block Proportion (VBP), the inclination of blocks, and the strength of matrix/block interfaces. By performance of sensitivity analysis on these factors, a statistically significant equation was obtained to estimate the safety factor of bimslopes using the multivariate regression method. The influence of block configurations and groundwater levels on the stability of bimslopes was then investigated to more confidently use the multivariate equation. Finally, to check the validity of procedures presented in this paper, a real failed bimslope in the Sungun mine (Iran) was investigated. The acceptable results from the Sungun analysis demonstrated the safety factor of bimslopes can be estimated using the practical solution presented in this paper. Highlights: Development of more than 1300 numerical models to analyze the key factors affecting the stability of block-in-matrix slopes (bimslopes). Investigation of the influence of volumetric block proportion, the inclination of blocks, and strength of matrix/block interface on the safety factor of bimslopes. Consideration of the substantial uncertainties affecting the analysis of bimslopes. Presentation of the results of research in the form of applied schemes and tables. Provision of a practical procedure and equation for estimating the safety factor of bimslopes.
- Subjects
SAFETY factor in engineering; SLOPE stability; WATER table; FINITE element method; FACTOR analysis; SENSITIVITY analysis
- Publication
Rock Mechanics & Rock Engineering, 2022, Vol 55, Issue 12, p7675
- ISSN
0723-2632
- Publication type
Article
- DOI
10.1007/s00603-022-03050-z