The karst formation is a characteristic result of negative anthropogenic activity and its impact on natural landscapes, which leads to their further modifications. A striking example of karst processes in Ukraine is the territory of Stebnyk Mining and Chemical Enterprise «Polymineral» in Lviv region. General surface deflection has been traced in the exits of the potassium salt deposit mines, as well as sub-vertical movements, which led to the emergence of several sinkholes. Given that the deformation processes in the territory of Stebnyk deposit are in an active stage, there is a high likelihood of new failures formation in residential areas and strategically important infrastructure objects, which confirms the importance of monitoring the deposit area. The study analyzes the current methods for researching sub-vertical movements, their advantages, and disadvantages. The results of the UAV survey of the Stebnytsky potash deposit area are presented, a digital elevation model of the sinkholes is created based on the orthomosaic, and their quantitative parameters are calculated and analyzed.
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