Skipochka S.I., Krukovskyi O.P., Palamarchuk T.A., Prokhorets L.V. Mechanic-chemical model of methane generation in the destruction of carbon substance

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Parent Category: Geo-Technical Mechanics, 2022

Category: Geo-Technical Mechanics, 2022, № 160

Geoteh. meh. 2022, 160, 17-28

 

MECHANIC-CHEMICAL MODEL OF METHANE GENERATION IN THE DESTRUCTION OF CARBON SUBSTANCE

¹Skipochka S.I., ¹Krukovskyi O.P., ¹Palamarchuk T.A., ¹Prokhorets L.V.

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine

UDC 622.023.623:622.411.332

Language: English

Abstract. The subject of research presented in the article is the anomalous release of methane from coal seams during their development. The purpose of the development is to estimate the maximum possible volumes of the main phase components of methane containing the coal seam, substantiation and development of a methane generation model during the destruction of coal. The analysis and generalization of own and third-party results experimental and theoretical researches executed by methods of X-ray diffraction analysis, nuclear magnetic and electronic paramagnetic resonance, raster microscopy, infrared spectroscopy, physical and mathematical modeling are used in the work. It is established that the role of solid carbon-methane solution, which dominates in the theory of gas-dynamic phenomena, and its share in the total volume of methane is significantly exaggerated. The main inconsistencies of this theory relate to three provisions. Discrepancies in the volumes of methane in solid solution to the volumes registered during the gas-dynamic phenomenon. Incompatibilities of the velocities of diffusion-filtration processes during the decomposition of a solid solution and the course of a gas-dynamic phenomenon. Inconsistencies in the sequence of ejection and formation processes of mad flour. The developed model of methane anomalous manifestations in the destruction of coal, as one of the main, takes into account the process of methane generation. The model assumes three phases of the gas-dynamic phenomenon. Long-term, including the formation of the geological environment and the influence of technological factors. The main duration is 5-15 s, which occurs as a result of the coal destruction and includes all possible physical, chemical and mechanic-chemical processes, primarily the release of free methane, mechanic-chemical reaction of methane synthesis (methane generation), desorption of physically bound methane and strengthening of this component by mechanics-electrics processes, decomposition of solid carbon-methane solution and release of gas-hydrate component of gas. The quenching phase of the process for several hours, during which of solid carbon-methane solution decomposition continues and relaxation gas-dynamic and geomechanical processes take place. The work is directed at improving the safety of miners by clarifying the theory of gas-dynamic phenomena and improving on this basis methods and means to prevent them.
Keywords: coal mine, gas-dynamic phenomena, theories of phenomena, mechanics-chemical processes, methane generation, model.

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About authors:

Skipochka Serhii Ivanovych, Doctor of Technical Sciences (D.Sc.), Professor, Head of Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of 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.

Krukovskyi Oleksandr Petrovych, Corresponding Member of the National Academy of Sciences of Ukraine, Doctor of Technical Sciences (D.Sc.), Deputy Director, Institute of Geotechnical Mechanics named by N. Poljakov of 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.

Palamarchuk Tetiana Andriivna, Doctor of Technical Sciences (D.Sc.), Leading Researcher in Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of 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.

Prokhorets Liliia Victorivna, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Laboratory of Physics and Geomechanical Monitoring of Rocks Mass, Institute of Geotechnical Mechanics named by N. Poljakov of 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.

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