Elements of dystortic theory in the evaluation «passport of strength» grounds

Calculation of technological modes and design parameters of equipment is related to the main structural and mechanical properties of soils that affect the conditions of interaction of machine working bodies with weak soils, which include peat deposits. Models in the theory of distortion play a key role as they allow visual and formal representation of complex and abstract phenomena, simplify their understanding and create a platform for accurate analysis and prediction. Distortion has become manifested as the ability of a system to move into different limiting qualitative states of development of its structure. The Coulomb-Mohr strength theory is widely used in mining as applied to lose incoherent materials, in this case to describe the stress state in peat spread on the deposit before the bulldozer blade. The parameters of the soil «strength passport» are considered, based on the scheme of determining the limiting invariants of distortion in peat mechanics on the example of evaluating the functioning of bulldozer equipment. The results of research on estimating the relationship between the material cohesion, which characterizes its structural connectivity between soil particles and the angle of internal friction of peat material, are summarized. The criterion of stress-strain state cohesion invariant depending on the determining parameter – angle of internal friction – is defined.

Zyuzin B. F., Zhigulskaya A. I. Elements of dystortic theory in the evaluation «passport of strength» grounds. MIAB. Mining Inf. Anal. Bull. 2025;(12-2):21-32. [In Russ]. DOI: 10.25018/0236_1493_2025_122_0_21.

B.F. Zyuzin¹, Dr. Sci. (Eng.), Professor, Head of Chair, e-mail: zbfru@yandex.ru, ORCID ID: 0000-0002-8344-3047, 
A.I. Zhigulskaya¹, Cand. Sci. (Eng.), Assistant Professor, Assistant Professor, e-mail: 9051963@gmail.com, ORCID ID: 0000-0003-4350-7314,
¹ Tver State Technical University, 170026, Tver, Russia.

A.I. Zhigulskaya, e-mail: 9051963@gmail.com.

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