Using photogrammetry to determine quarry slope stability coefficient

The purpose of the research is to consider the methodology for obtaining and possible using of photogrammetric processing of aerial photography data from an unmanned aerial vehicle in order to construct a digital model of the marble quarry bench slope as well as to determine bench fracturing characteristics from the obtained images. The study included aerial photography of the explored bench using photogrammetric data processing, creation of digital terrain models in Agisoft software, and plotting a diagram of bench fracturing on the basis of the images received. The stability margin factor of the bench slope was calculated using the GeoStab, Plaxis and Geomix software. To evaluate, control and compare the results obtained, the stability coefficient was calculated using the classical method. It was found that Plaxis 2D and GeoStab software are more efficient in determining the stability coefficient for the case of homogeneous soil masses free from pronounced geodynamic disturbances. The Geomix software takes into account both the geodynamic characteristics of a homogeneous bench of the quarry slope and its fracturing nature, which allows more accurate determination of the stability margin coefficient of the bench, more precise prediction of potential locations of failures and sliding rock mass parameters. It has been determined that the methods of photogrammetric processing of images obtained from an unmanned aerial vehicle allow to perform more accurate simulation of the studied slopes and to obtain reliable data on the slope fracturing faster. The latter has a positive effect on the quality of slope stability calculation and prediction of its deformation, which is an important factor in improving the safety of mining production.