Технічна інженерія (Nov 2023)
Establishing the stability of the quartz sand slopes at the Sykhivske deposit quarry
Abstract
The scientific publication highlights the results of research on determining the parameters of stability of quartz sand slope. According to the analysis of previous studies, it was found that in the vast majority of cases, methods for calculating slope stability are based on a model of a boundary-stress environment using graphical construction methods, application software packages for calculating slope stability, and numerical methods. For the conditions of development of the Sykhiv quartz sand deposit, the stability of the working slope was calculated using graphical methods and the Rocscience Slide software package, and a comparative analysis of sliding surfaces was carried out. Using graphical construction methods (classical and simplified), based on the strength criterion of the Coulomb-Mor rock mass, and Autodesk AutoCAD, circular-cylindrical sliding surfaces of possible displacement on the working slope of the quartz sands of the Sykhivske deposit were determined and all the necessary parameters of its stability were determined. The sliding surfaces, graphical and calculated parameters of both methods were identical. The slope stability parameters were determined in the Rocscience Slide software package using the Slide 6 programme. Mohr-Coulomb was chosen as the strength criterion, and Bishop, Janbu and Spencer were used as the analysis methods. For each method, the following were determined: the global minimum sliding surface and the contours of the minimum stability factor; the minimum stability factor surface generated at each point of the grid; all possible sliding surfaces; and sliding surfaces for stability factor values from 0.5 to 1.3 (the standard value). The results of calculations show that when using the Janbu method, the quartz sand slope is more dangerous than when using the Bishop and Spencer methods (by about 4...6 % according to the given indicators of slope stability). Compared to the classical method of graphical construction, which is currently normative, the values obtained in Slide for all selected methods of analysis differ significantly in the direction of higher danger, especially in terms of global minimum.
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