Bulat A., Krukovskyi O., Bulich Yu., Bezruchko K., Burchak O. Geomechanics as a factor of carbonification transformations at various hierarchical and scale levels
- Details
- Parent Category: Geo-Technical Mechanics, 2024
- Category: Geo-Technical Mechanics, 2024, Issue 170
Geoteh. meh. 2024, 170, 156-164
GEOMECHANICS AS A FACTOR OF CARBONIFICATION TRANSFORMATIONS AT VARIOUS HIERARCHICAL AND SCALE LEVELS
Bulat A., Krukovskyi O., Bulich Yu., Bezruchko K., Burchak O.
M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
UDC 550.3:622.02:552.57:552.08
Language: English
Abstract. The purpose of the initiated research for studying geomechanical factor of carbonization transformations is to assess the energy state of coal substance for further conscious control of structural transformations occurred in the atomic-molecular structure of coal due to the manifestations of the accumulated elastic energy. Elastic properties of coal were determined by the static method based on compressive resistance. The level of energy that can be accumulated in the molecular structure of coal under laboratory conditions was assessed at the stage of unloading the sample with arbitrary adjustment of its parameters by moving the meter after preliminary loading. The primary analysis of the results suggests that at the first stage, both plastic and elastic deformations occur simultaneously in heterogeneous, multicomponent, amorphous coal substance. At the second stage (reloading), only elastic deformations are observed. The energy of structural stresses at the molecular level is a parameter critically necessary for understanding the nature of carbonization transformations. Thus, it is for the first time when the possibility to assess experimentally the elastic energy, which can be accumulated in the molecular structure of a heterogeneous, multicomponent, amorphous substance of coal under force load, is proven. Taking into account the fact that the rate of free radical transformations in metastable carbonized organic substance is determined by the processes of relaxation of elastic energy accumulated in the substance at the atomic-molecular level, the understanding of the ability of the molecular structure of coal substance for the stress accumulation and manifestations makes it possible to adequately assess the properties of coal in order to develop the advanced technologies for the use of solid hydrocarbons (destruction to a gaseous state and, subsequently, nanosynthesis). The obtained results form the basis for further research involving measurements with different grades of coal and different particle classes, state and properties. Understanding the changes in the state of coal substance under the influence of the geomechanical factor will make it possible to establish the interdependence of elastic properties and gas generation capacity of carbonized organic substance.
Keywords: geomechanics, coal substance, structural stresses, energy.
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About the authors:
Bulat Anatolii, Academician of the National Academy of Science of Ukraine, Doctor of Technical Sciences (D. Sc), Professor, Director of the Institute, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0002-6541-2140
Krukovskyi Oleksandr, Corresponding Member of NAS of Ukraine, Doctor of Technical Sciences (D.Sc), Deputy Director of the Institute, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0002-2659-5095
Bulich Yurii, Master of Science, Researcher in Department of Rock Mechanics, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine,
This email address is being protected from spambots. You need JavaScript enabled to view it.
ORCID 0000-0003-3442-9203
Bezruchko Kostiantyn, Doctor of Geology Science (D.Sc), Senior Researcher, Head of Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanicsof National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID0000-0002-3818-5624
Burchak Oleksandr,Doctor of Technical Science (D.Sc), Senior Researcher, Senior Research in Department of Geology of Coal Beds at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanicsof National Academy of Sciences of Ukraine (IGTM NAS of Ukraine), Head of Department of Geology of Coal Beds at Great Depths, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0001-9114-8585