The influence of great depths on the conditions activating the desorption of adsorbed methanegenerated in a virgin coal seam | [ARPN Journal of Engineering and Applied Sciences • 2024]

Author(s):

1. Serhii Minieiev: M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine,Dnipro,Ukraine

2. Alla Prusova: M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine,Dnipro,Ukraine

3. Oleksii Yanzhula: Directorate for Technical Development and Investments of the Coal Deportation of Metinvest Holding,Dnipro,Ukraine

4. Oleksandr Minieiev: Dnipro University of Technology,Dnipro,Ukraine

5. Andrii Khorolskyi: Branch for Physics of Mining Processes of the M.S. Poliakov Institute of Geotechnical Mechanics the National Academy,Dnipro,Ukraine

Abstract:

It is generally accepted that when a coal seam is in a virgin rock massif for millions of years under the influence of rock pressure, its state is characterized by the absence of any physical processes in it. In this article, it is stated that in reality, in these conditions relaxation processes can occur. These processes are caused by conformational rearrangements in the coal microstructure. They, in turn, create conditions for breaking the sorption equilibrium of adsorbed methane in coal due to the distance of methane molecules from the microstructure of the coal medium when the interlayer distances in the graphite-like layers of the coal seam expand. The parameters are established, which determine the duration of the coal molecular structure relaxation; characterize the ability of the structure to deform, and the conditions under which the most significant changes occur. It is shown that the main parameters that affect the activation of desorption of adsorbed methane in a virgin coal seam are the energy of conformational rearrangement activation, the temperature of the seam, and the interlayer distance in the graphite-like layers. As a result of the research, it was found that with an increase in the depth of the virgin coal seam, relaxation processes in it occur faster. These processes are caused by conformational rearrangements in the coal microstructure. They, in turn, create conditions for breaking the sorption equilibrium of adsorbed methane in coal due to the distance of methane molecules from the microstructure of the coal medium when the interlayer distances in the graphite-like layers of the coal seam expand. The novelty of this research is in the establishment of the fact that with an increase in the depth of the virgin coal seam, all physical and mechanical processes associated with changes in the molecular structure of coal occur faster. At the same time, the energy of activation of these processes realization is less, including the energy of activation of adsorbed methane desorption.

Page(s): 1421-1427

DOI: DOI not available

Published: Journal: ARPN Journal of Engineering and Applied Sciences, Volume: 19, Issue: 23, Year: 2024

Keywords:

Activation energy , coal seam microstructure , interlayer distances , graphitelike layers , conformational rearrangements , adsorbed methane

References:

[1] Bulat A. F.,Skipochka S. I.,Palamarchuk T. A.,Antsyferov V. A.,Lira LTD .2010 .Metanogeneratsiia v ugolnykh plastakh [Methane generation in coal seams]. , : .

[2] Radchenko A. G.,Savchenko A. V.,Radchenko A. A.,Salii S. G.,Nikolaev D.,Yu D. .2017 .Patterns of changes in the natural gas content of Donbass coals with increasing mining depth. Sbornik nauchnykh trudov Donetskogo gosudarstvennogo tekhnicheskogo universiteta, 8(51) : 22-31.

[3] Lousada S.,Delehan S.,Khorolskyi A. .1952 .Application of Dynamic Programming Models for Improvement of Technological Approaches to Combat Negative Water Leakage in the Underground Space. , 16(14) : .

[4] Mineev S. P. .2016 .Prognoz i sposoby borby s gazodinamicheskimi yavleniyami na shakhtakh Ukrainy [Forecast and methods of combating gasdynamic phenomena in Ukrainian mines]. , : .

[5] Antsiferov A. V.,Golubev A. A.,Kanin V. A.,Tirkel M. G. .2009 .Gas content and methane resources of coal deposits of Ukraine. Geologiya i gazonosnost Zapadnogo, Yugo-Zapadnogoi Yuzhnogo Donbassa. , 1 : 261-313.

[6] Feldman E. P.,Vasilenko T. A.,Kalugina N. A. .2014 .Physical kinetics of the coal seam - methane system: mass transfer, pre-outburst phenomena. Fiziko-tekhnicheskiye problemy razrabotki poleznykh iskopayemykh. , : 46-65.

[7] Feldman E. P.,Kalugina N. A.,Chesnokova O. V. .2018 .The influence of filtration on the evolution of the main crack during stationary advance of the face. (138), : 212-217.

[8] Kalugina N. A. .2014 .Assessment of the influence of gas filtration during the process of cracking in a coal seam. (118), : 46-54.

[9] Alekseev A. D.,Naukova Dumka .2010 .Fizika uglya i gornykh protsessov [Physics of coal and mining processes]. , : .

[10] Vasilkovsky V. A.,Mineev S. P. .2017 .Distribution and mechanism of methane movement in coal blocks. Fiziko-tekhnicheskiye problemy gornogo proizvodstva. , 19 : 19-33.

[11] Power Electric . .Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using. , : .

[12] Bulat A. F.,Mineev S. P,Prusova А. А. .2016 .Generating methane adsorpting under relaxation of molecular of coal. Journal of Mining Science, 52(1) : 70-79.

[13] Saranchuk V. I.,Airuni A. T.,Kovalev K. E.,Naukova Dumka .1988 .Nadmolekulyarnaya organizatsiya, struktura i svoystva uglya [Supramolecular organization, structure and. , : .

[14] Bondarenko A. K.,Amarsky E. G.,Dmitrikov V. P. . .Study of Donetsk coals of varying degrees of metamorphism using IR spectroscopy. KHTT. (4), : 12-15.

[15] Mineev S. P. .2009 .Svoystva gazonasyshchennogo uglya [Properties of gas-saturated coal]. , : .

[16] Mineev S. P.,Prusova A. A.,Kornilov M. G. .2007 .Aktivatsiya desorbtsii metana v ugolnykh plastakh [Activation of methane desorption in coal seams]. , : .

[17] Ettinger I. L. .1975 .Raspredeleniye metana v porakh iskopayemykh ugley [Distribution of methane in the pores of fossil coals]. Nauka, : 248.

[18] Mineev S. P.,Rubinsky A. A.,Vitushko O. V.,Radchenko A. G. .2010 .Gornyyeraboty v slozhnykh usloviyakh na vybrosoopasnykh ugolnykh plastakh [Mining work in difficult conditions on outburstprone coal seams], Skhidnyu Vidavnichyu Dim. , : .

[19] Alekseev A. D.,Vasilenko T. A.,Voloshina N. I. .2003 .Methane in fossil coals. (42), : 186-198.

[20] Klopffer М. Н.,Flaconneche В М. Н. .2001 .Transport Properties of Gases in Polymers: Bibliographic Review. Oil and Gas Science and Technology, 56(3) : 223-244.

[21] Polyashov A. S. .2001 .On the question of the nature of methane sorption by coal Science Bulletin of NSAU. (1. , : 20-23.

[22] Gul V. E. .1974 .Struktura i prochnost polimerov [Structure and strength of polymers], Khimiya. , : 350.

[23] Garkavenko I. A.,Zaichenko V.,Yu V.,Mekhedko A. F.,Razvalov N. P. .1971 .Metodika geofizichnykh issledovaniy skvazhin Donbassa [Methodology for geophysical research of wells in Donbass] Naukova Dumka. , : .

Citations

Downloads

Views