Purpose. Identifying the causes of additional energy consumption for deformation of the drill string. Methodology. The study was conducted by analyzing the causes of deformations and justifying their impact on the dynamic parameters of the drill string.

Substantiation of rational parameters for the formation of a filling mass of metallurgical slags on the basis of a complex of laboratory studies and physical modeling for the reclamation of technologically disturbed lands. An integrated methodological approach was used, including sampling, microscopic and X-ray fluorescence analyzes, particle size analysis, laboratory studies of the products of interaction between slags and water, physical modeling of the filling massif, laboratory determination of the physical properties of slags, and numerical modeling of the deformations of the filling massif.

Investigation of robustness and reliability of parameters of tower of attraction structure.