Purpose. Determining the parameters of tillage operating unit design to provide energy-efficient tillage by means of operating units of excavation machinery. Methodology. The theoretical studies were based on the general provisions of agricultural mechanics, the elements of continuum theory, Coulomb-Mohr theory of strength. Analytical and graphical analysis of mathematical models was implemented by means of their visual reproduction in space and time on a PC using applied and developed software. Findings. The basic principles of adapted passive operating unit creation for vertically differentiated deep tillage and recultivation after opencast mining (e.g., the case of amber extraction) are described. Originality. The mathematical models for the construction of energy-efficient, environmentally focused tools for loosening the soil and differentiated tillage based on the regularity research of the tool for loosening the soil chunk by means of two plane buckle have been obtained. Practical value. Methods for the design and engineering calculation of tiered operating units for differentiated deep soil tillage have been developed.

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