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<p>The peculiarities of structural transformations occurring at the molecular level in the Donetsk basin (Donbas) coal deposit structure at all scale levels (from macro- to micro-disturbances) under the influence of external pressure depending on the stress-strain state are established. The study confirms the genetic link between the macro-level disturbance, changes in physical and mechanical properties at the micro-level, and structural transformations of coal substance at the nanoscale after the inversion of the tectonic regime in Donbas. The results of laboratory studies of coal substances obtained by electron paramagnetic resonance, nuclear magnetic resonance, FTIR spectroscopy, and squid magnetometry are presented. It is shown that under the influence of external mechanical load and temperature, the structural and functional reorganization of the molecular structure of coal substance occurs, and the internal energy generated in this process significantly affects the properties (magnetic susceptibility) and state of the substance. It has been experimentally proven by the method of electron shearography that under the influence of weak heat fluxes, structural stresses arise in coal due to the heterogeneity and defectiveness of the substance structure. The fractality of discontinuous dislocations within the Donetsk basin (from deep faults to microdislocations) was estimated by the Hausdorff–Bezikovich method (cellular dimension). The difference between the fractal dimensions of discontinuous faults at different scale levels indicates the multifractal nature of the geological environment. The fractal dimensions of faulting calculated at different scale levels made it possible to describe the Donbas coal massif’s structure and propose a scale-hierarchical model. It has been established that the structure of the Donbas is characterized, on the one hand, by the lateral repetition of tectonic structures caused by wave processes and, on the other hand, by a hierarchical discrete self-similar structure (fractality). The duality of the structure indicates the need to develop and apply new methods for more efficient development of Donbas coal and gas fields.</p>

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Deformation Processes in the Geological Environment at Different Scale Levels

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • A. F. Bulat,
  • K. A. Bezruchko,
  • L. I. Pimonenko,
  • O. V. Burchak,
  • V. I. Baranovskyi

摘要

The peculiarities of structural transformations occurring at the molecular level in the Donetsk basin (Donbas) coal deposit structure at all scale levels (from macro- to micro-disturbances) under the influence of external pressure depending on the stress-strain state are established. The study confirms the genetic link between the macro-level disturbance, changes in physical and mechanical properties at the micro-level, and structural transformations of coal substance at the nanoscale after the inversion of the tectonic regime in Donbas. The results of laboratory studies of coal substances obtained by electron paramagnetic resonance, nuclear magnetic resonance, FTIR spectroscopy, and squid magnetometry are presented. It is shown that under the influence of external mechanical load and temperature, the structural and functional reorganization of the molecular structure of coal substance occurs, and the internal energy generated in this process significantly affects the properties (magnetic susceptibility) and state of the substance. It has been experimentally proven by the method of electron shearography that under the influence of weak heat fluxes, structural stresses arise in coal due to the heterogeneity and defectiveness of the substance structure. The fractality of discontinuous dislocations within the Donetsk basin (from deep faults to microdislocations) was estimated by the Hausdorff–Bezikovich method (cellular dimension). The difference between the fractal dimensions of discontinuous faults at different scale levels indicates the multifractal nature of the geological environment. The fractal dimensions of faulting calculated at different scale levels made it possible to describe the Donbas coal massif’s structure and propose a scale-hierarchical model. It has been established that the structure of the Donbas is characterized, on the one hand, by the lateral repetition of tectonic structures caused by wave processes and, on the other hand, by a hierarchical discrete self-similar structure (fractality). The duality of the structure indicates the need to develop and apply new methods for more efficient development of Donbas coal and gas fields.