A Contemporary Approach in Geotechnical Slope Stability Analysis: Lithological Implicit Modelling

2015-04-17
Yardımcı, Ahmet Güneş
Basarir, H.
Open pit slope stability is a major concern in any mine prefeasibility study. Most widely used numerical and limit equilibrium methods require two inputs: rock mass mechanical parameters and bedding geometry of lithological units. Traditionally, rough geological models prepared by time consuming explicit method of manual digitization or assumptions depending on lithological drillhole logs form the basis for geometry of stability analysis models. However, the real geometry can be dramatically different. A novel method named as implicit modelling is capable of creating solid volumes for lithological units within a few minutes, free of operator bias. Also, complex geological structures like bedding and folding can be represented with high accuracy. In this paper, theoretical background of implicit modelling is covered briefly and a sample application is presented on an open pit iron mine slope stability analysis. Advantages of the geological model prepared by the new method in geotechnical studies are clearly declared.
24th International Mining Congress Of Turkey

Suggestions

Probabilistic Slope Stability Analysis: A Case Study
Huvaj Sarıhan, Nejan (2018-10-01)
Probabilistic slope stability analyses are becoming more and more popular to evaluate the safety level of slopes and associated risk and reliability, especially in the recent years. The probabilistic approach can take into account the uncertainties and natural variability in material properties, as well as in environmental factors, by using various statistical distribution functions (such as normal, lognormal etc.) for random variables. It is already noted by various researchers that, a slope with a determi...
Probabilistic Slope Stability Analyses: Effects of the Coefficient of Variation and the Cross-Correlation of Shear Strength Parameters
Oğuz, Emir Ahmet; Yalçın, Yağızer ; Huvaj Sarıhan, Nejan (2017-03-15)
The assessment of the safety level of natural slopes, road cuts, embankments and levees require consideration of uncertainties and variability in material properties. In this study, for a number of slope geometries, including a real-life landslide case, probability of failure (PF) and the most critical failure surface are investigated with and without cross-correlation of shear strength properties. Slopes having different traditionally-defined factor of safety (FS) levels are studied. The uncertainty of soi...
Stability Analysis and Optimized Slope Angle for the Iron Ore Open-Pit Mine
Akdağ, S.; Başarır, H.; Karpuz, Celal; Özyurt, M. (2015-04-17)
With an increase in the overall slope height of open pit mines, stability analysis and amount of stripping waste rock becomes progressively difficult. It is necessary to optimize the overall slope angle by increasing it as much as possible with ensuring the mining safety. After comprehensive geotechnical investigation and rock mechanical laboratory tests, the combined use of limit equilibrium and numerical modeling analysis methods increases reliability and accuracy of the stability analysis. With the optim...
Application of recent optimization algorithms on slope stability problems
Azizi, Sadra; Pekcan, Onur; Department of Civil Engineering (2018)
Stability analysis of earth slopes in general involves determining the minimum factor of safety (FS) associated with the most critical failure surface. This objective is too challenging to accomplish considering the broad diversity of slope problems in geometry, geotechnical parameters of the soil, location of the groundwater table, and condition of the external loadings. Robust optimization techniques, however, have recently performed well in determining safety factors of various man-made and natural slope...
Assessment of rock slope stability along the proposed Ankara-Pozanti autoroad in Turkey
Avci, Km; Akgün, Haluk; Doyuran, Vedat (1999-01-01)
The main objective of this study is the determination of the slope stability and excavatability category of discontinuous rock exposed between 53 + 000 and 58 + 000 km of the proposed Ankara-Pozanti autoroad in Turkey to provide secure access. The-study area is mostly in the outcrops of highly jointed sandstone with minor layers of marl. This Maastrichtian-Eocene Group also contains conglomerate and limestone bands of flysch character called the Pasadag Group. Quaternary alluvial deposits occur throughout t...
Citation Formats
A. G. Yardımcı and H. Basarir, “A Contemporary Approach in Geotechnical Slope Stability Analysis: Lithological Implicit Modelling,” presented at the 24th International Mining Congress Of Turkey, Antalya, TURKEY, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54484.