METHANE GENERATION AND COAL METAMORPHISM

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 115

UDС 622.023.623:622.411.332

Authors:

S. I.Skipochka D. Sc. (Tech.), Professor,

Т. А. Palamarchuk, D. Sc. (Tech.), Senior Researcher,

 (IGTM NAS of Ukraine);

S. А. Оmelchenko, D. Sc. (Phys.-math.),

О. V. Khmelenko, Ph. D. (Phys.-math.)

(SHEE «DNU»)

Abstract.

Purpose of this article is to research features of the atomic and molecular structure of a coal substance with varying degrees of metamorphism, at the substance disintegration in particular. Such methods as scientific analysis and synthesis, electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) were used in the research.

A ratio of aromatic and aliphatic components in the protons ¹³C of the coals with varying degrees of metamorphism were estimated by the NMR spectroscopy. It is stated that at "slow" mechanical fracture, no significant chemical transformations occur in the coals except for oxidative reactions which are similar to an effect of temperatures existing before the phase is changed. At the "explosive" fracture of the coal samples, some additional lines occur in the EPR spectra of the nanoparticles of the coal extracted from water as opposed to the particles with the size more than 0.05 mm. This fact can be explained by occurrence of new paramagnetic centers whose total concentration exceeds a concentration of initial centers by five orders. 

Focus of the research was on improving a theory of and methods for forecasting gas-dynamic phenomena in the coal mines. The findings essentially clarify the disputable issue and confirm viability of a proposed hypothetical model of anomalous methane manifestations, which is based on the phenomenon of methane generation.

Keywords:

coal substance, metamorphism, disintegration, radio spectroscopy, methane generation.

References:

1. Rossiyskaya ugolnaya enciklopediya [Russian coal encyclopedia] (2006), v. 2, VSEGEI, Moscow, St.-Pb., Russia.

2. Saranchuk, V. I., Ilyashov, M. A., Oshovsky, V. V. and Saranchuk, E. V. (2006), Uglerod: neizvestnoe ob izvestnov [Carbon: unknown about the famous], Centr, Donetsk, Ukraine.

3. Frolkov, G. D. and Frolkov, A. G. (2005), “Mechanochemical concept outburst coal seams”, Ugol, no. 2, pp. 18-21.

4. Skipochka, S. I, Palamarchuk, T. A. and Kutseva, N. A. (2008), “To question of the methane generation mechanism in coal seams”, Dopovidi NAN Ukraine, no. 11, pp. 73-79.

5. Lukinoff, V. V., Goncharenko, V. A. and Suvorov, D. A. (2010), “Generation of methane coal under the influence by coat technology  and natural tectonic processes in the rock massif”, Geo-Technical Mechanics, no. 88, pp. 130-140.

6. Bulat, A. F., Skipochka, S. I, Palamarchuk, T. A. and Antsiferov, V. A. (2010), Metanogeneraciya v ugolnykh plastakh [Methanogeneration in coal seams], Lira, Dnepropetrovsk, Ukraine.

7. Skipochka, S. I., Palamarchuk, T. A. and Omelchenko, S. A. (2012), “Investigation of the effect of extreme conditions on the physical properties of coals”, Geo-Technical Mechanics, no. 102, pp. 128-135.

About the authors:

Skipochka Sergej Ivanovitch, Doctor of technical sciences (D. Sc), Professor, Head of Department of Rock Mechanics, the Polyakov Institute of geotechnical mechanics of the National Academy of science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Palamarchuk Tatyana Andreevna, Doctor of technical sciences (D. Sc), Senior Researcher, Principal Researcher in Rock Mechanics Department, the Polyakov Institute of geotechnical mechanics of the National Academy of science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine.

Omelchenko Sergej Aleksandrovitch, Doctor of Physics and Mathematics (D.Sc.), Professor of electronics the O. Gonchar Dnepropetrovsk National University (DNU), Dnepropetrovsk, Ukraine.

Khmelenko Oleg Valerievitch, Candidate of Physics and Mathematics (Ph.D), Associate Professor of electronics the Gonchar Dnepropetrovsk National University (DNU), Dnepropetrovsk, Ukraine.

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