The practical use of the approach to increasing the geometric accuracy of the 3D rock mass model with the use of the mining technological transport identified in the photographs during loading and unloading operations in an open coal store is considered. Experimental data are presented on the creation of a digital terrain model of an open coal deposit on the basis of aerial survey data using unmanned aerial vehicles Geoscan 101, PTERO-E5 and GateWing X100. The process of photogrammetry processing of aerial photographs in digital system PhotoScan is described. Mean square errors at the control points in plan and by height, found from the differences in double measurements using the GPS/GLONASS survey data of the receiver, for three models of the coal storage terrain before and after the coordinate network correction. It is established that aerial photography using unmanned aerial vehicles allows to quickly register the space-time characteristics of an open coal store with accuracy plan and by height corresponding to plans of scale 1 : 500.
The article examines the methods of building and estimating the accuracy of digital elevation model of a mine take and coal stores. The article describes the process of aerial photography with the help of unmanned aerial vehicle. The approach to the choice of rational parameters of flight assignment of unmanned air complexes when performing aerial photography of surface ground environment of coal enterprises is developed. The article reveals the results of comparative analysis of the use of standard digital cameras and unmanned aerial vehicles of aircraft type in order to create topographic plans at a scale of 1 : 2000. Models weighting more than 5 kg with ship-based full-scale photographic cameras and a lens with focal distance not less than 30 mm are recommended for air photography of coal stores. It is shown that the offered method of parameters choice and air photography performance can be used to increase the efficiency of mine surveying works on recording and controlling coal mining.