ABSTRACT
The paper compares two approaches of the stability analyses of rock slopes using the example of an open-pit mine in Csákvár, Hungary. The aim of the study is to compare the currently used and widely accepted deterministic analysis with the probabilistic-based slope sta- bility analysis, which is presently less circumscribed and standardized in Europe. Using our pre- vious measurements in the dolomite quarry, which was mentioned above, we collected the data required for the research, such as defined characteristic and probabilistic parameters for analyzing the stability of the examined rock slope cross-sections. Our calculations were concerned with plane, wedge and circular failures, for that RocPlane, SWedge and Slide programs were used. During the comparison, the factor of safety (FoS) obtained from the deterministic calculations was examined and compared with the different results of the probabilistic approach. In addition, the optimization of the slope design was also carried out with both methods in order to see which analysis leads to more economical solution. The design of a slope (slope angle, number of benches, location of the benches) may be more flexible with the probabilistic calculations consid- ering different acceptance criteria. Therefore the optimization of the geometry was also carried out using various criteria known from the literature. The results of the different comparisons demonstrate the benefits and the difficulties of the application of the probabilistic calculations.
