Mineev S.P., Prusova A.A., Sapehyn V.N., Yanzhula A.S., Kyshkan M.A. Modeling of filtration processes in the coal seam with displaced zone saturated by the sorbed and free methane

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 130

Geoteh. meh. 2016, 130, 20-42

  MODELING OF FILTRATION PROCESSES IN THE COAL SEAM WITH DISPLACED ZONE SATURATED BY THE SORBED AND FREE METHANE
 Minieiev S.P., Prusova A.A., Sapehyn V.N., Yanzhula A.S., Kyshkan M.A. 
IGTM NAS of Ukraine

UDC [622.411.322.023.623:533.587:551.243].001.57

Abstract. Initial state of zone with tectonic displacement in geomechanical space of the coalrock mass was considered, and energetic potential of this area and volume of stored methane were specified. The specified regularities of potential strain energy changing help evaluating potential energy conformers of the molecular structure of coal, which cause the structure deformation in the area with bearing pressure. The article represents a model of the coal fractured-and-porous structure in the displaced area, which consists of fragments of different scale level in the hierarchical structure of the coal. Modeling of filtering process in the coal seam is based on a concept that a coal seam is a structurally heterogeneous system represented in the form of combinations of several sections, each of which is described by average values of porosity and gas permeability with the help of the K.S. Basniev method. Such approach makes possible to apply the Y.P. Zheltov filtering equation to any combination of the coal sections. A problem of methane desorption from the core of displaced zone in the coal seam was reduced to the problem of total methane diffusion from the coal fragments, which were separated by the coal broken structure. With a single source, desorption is described by diffusion equation in spherical coordinates. In order to specify the activation energy and diffusion coefficient, the Pace-Deytiner model was used with taking into account the following key parameters: constants, which described deformation of the coal broken structure; the Lennard-Jones potential, which characterized energetic interdependence between the coal structure and methane molecules; diameter of methane molecule and length of its free diffusion jump; and temperature of the coal seam.
Keywords: coal seam, filtering, free methane, adsorbed methane, desorption, diffusion.

REFERENCES

1. Ruban, A.D., Artemov, V.B., Zaburdyaev, V.S., Zakharov, V.N., Loginov, A.K. and Yutyaev, E.P. (2010), Podgotovka i razrabotka vysokogazonosnykh ugolnykh plastov [Preparation and Development of Very Gassy Coal seams], Gornaya kniga, Moscow, Russia.

2. Brizhanev, A.M., Galazov, R.A., Kushch, O.A. et al. (1985), "Effect of fracture and fault tectonics melkoamplitudnoy on methane in the underground workings of coal mines of Donbass", Izvestiya vuzov:. Geologiya i razvedka, no2, pp. 51-56.

3. Driban, V.A., Yuzhanin. I.A. and Sevryukov, S.A. (2011), "Areas of research influence melkoamplitudnoy disturbance at mining operations", Naukovі pratsі UkrNDMІ NAS of Ukraine, no. 8, pp. 6-18.

4. Mineev, S.P., Rubinsky, A.A., Vitushko, O.V. and Radchenko, A.V. (2010), Gornye raboty v slozhnykh usloviyakh na vybrosoopasnykh plastakh [Mining operations in difficult conditions in the outburst seams], Shіdny vidavnichіy Dim, Donetsk, Ukraine.

5. Mineev, S.P. (2016), Prognoz i sposoby borby s gazodinamicheskimi yavleniyami na shakhtakh Ukrainy [Forecast and ways to deal with gas-dynamic phenomena in mines Ukraine], Shіdny vidavnichіy Dim, Mariupol, Ukraine.

6. Malyshev, Y.N., Troubetzkoy, K.N. and Airuni, A.T. (2000), Fundamentalno-prikladnye metody resheniya problem metana ugolnykh plastov [Fundamentally - applied methods for solving the problem of coal bed methane],Izdatelstvo akademii gornykh nauk, Moscow, Russia.

7. Olhovichenko, A.E. (1982), Prognoz vybrosoopasnosti ugolnykh plastov [Forecast outburst coal seams], Nedra, Moscow, Russia.

8. Vassoevich, N.B., Librovich, V.L., Logvinenko, N.V. and Marchenko ,V.I. (ed) (1983) Spravochnik po litologii [Reference lithology], Nedra, Moscow, USSR.

9. Mironov, K.V. (1991), Spravochnik geologa - ugolshchika [Directory geologa- collier], Nedra, Moscow, USSR.

10. Shemyakin, E.I., Kurlenya, M.V. and Kulakov, G.I. (1986), "On the question of the classification of rock bursts", Fiziko-technicheskie problemy razrabotki poleznykh iskopaemykh, no.5, pp. 3-11.

11. Petukhov, I.M. (1979), Gornye udary na ugolnykh shakhtakh [Mining strikes in the coal mines], Nedra, Moscow, USSR.

12. Bulat, A.F. Mineev, S.P. and Prusova, A.A. (2016), "Generation of methane sorbed due to strain relaxation mechanism of molecular coal", Fiziko-technicheskie problemy razrabotki poleznykh iskopaemykh 2016, no.1, pp. 91-99.

13. Tenord, Ch. (1965), Fizicheskaya khimiya polimerov [Physical chemistry of polymers], Khimiya, Moscow, USSR.

14. Kuleznev, V.N. and Shershnev, V.A. (1988), Khimiya i fizika polimerov [Chemistry and Physics of Polymers], Vyshaya shkola, Moscow, USSR.

15. Mineev, S.P., Prusova, A.A. and Kornilov, M.G. (2007), Aktivatsiya desorbtsii metana v ugolnykh plastakh [Activating the desorption of methane in coal seams], Weber, Dnepropetrovsk, Ukraine.

16. Mezon, U. (1969), Fizicheskaya akustika. Tom IV. Chast B. Primenenie fizicheskoy akustiki v kvantovoy fizike i fizike tverdogo tela [Physical Acoustics. Volume 4, Part B. Applications physical acoustics in quantum physics and solid state physics], Mir, Moscow, USSR.

17. Gregg, S.J. and Sing, K.S.W. (1967), "Adsorption, Surface Area and Porosity", Academic Press, London and New York, England – USA.

18. Mineev, S.P., Prusova, A.A., Kocherga, V.N. and Potapenko, A.A. (2014), "Methodology for assessing the possibility of spontaneous release of adsorbed methane from the coal seam", Naukovi pratsi UkrNDMІ NASU, vol 14, pp. 113-127.

19. Zhou, L. and Zhang, J. (2001), "A Simple Isotherm Equation for Modeling the adsorption Equilibria on Porous Solids over Wide Temperature Ranges", Langmuir, vol. 17, pp. 5503-5507.

20. Mineev, S.P. (2009), Svoystva gazonasyshchennogo uglya [Properties of gas-saturated coal], NMU, Dnepropetrovsk, Ukraine.

21. Khodot, V.V., Yanovskaya, M.F. , Premysler, Yu.S. et al. (1973), Fiziko-khimiya gazodinamicheskikh yavleniy v shakhtakh [Physical chemistry of gas-dynamic phenomena in mines], Nauka, Moscow, USSR.

22. Kovalev, I.B. and Solovieva E.A. (2001), ―On the possibility of the use of physical and mechanical characteristics of coal to assess the ability of coal seams to metanootdache‖, 6 St.- Seminar IPKON early, IPKON RAS, available at: http://www.seminar-1.narod.ru/sem10/d10.htm, (Accessed 1 September 2016).

23. Bulat, A.F. and Dyrda, V.I. (2005), Fraktaly v geomekhanike [Fractals in geomechanics], Naukova Dumka, Kiev, Ukraine.

24. Mineev, S.P. and Prusova, A.A. (1992), ―Kinetics of structural changes in the reference pressure zone busy gas-saturated coal seam Fiziko-technicheskie problemy razrabotki poleznykh iskopaemykh, no. 2, pp. 53-60.

25. Petukhov, I.M. and Linkov, A.M. (1983), Mekhanika gornykh udarov i vybrosov [The mechanics of rock bursts and releases], Nedra, Moscow, USSR.

26. Matveev, V.A. Matveev, A.V., Mosyakov, V.A. and Feoktistov, V.M. (2001), "Stress-strain state of the rocks and the formation of the roof in the area of the moving face", Mining informational and analytical bulletin, no. 8, pp.120-125. 

27. Basniev, K.S., Vlasov, A.M., Kochina, I.N. and Maksimov, V.M. (1986), Podzemnaya gidravlika [Underground hydraulics: Textbook for Universities], Nedra, Moscow, USSR.

28. Zheltov, Yu.P. (1975), Mekhanika neftegazonosnogo plasta [Mechanics of oil and gas reservoir Nedra, Moscow, USSR.

29. Leibenzon, L.S. (1947), Dvizhenie prirodnykh zhydkostey i gazov v poristiy srede [Movement of natural fluids in porous media], State Publishing House VDVS technical-theoretical literature, Leningrad, USSR.

30. Ettinger, I.L. (1975), Raspredelenie metana v porakh iskopaemykh ugley [The distribution of methane in the pores of fossil coals], Nauka, Moscow, USSR.

31. Aramanovich, I.G. and Levin, V.I. (1969) Uravneniya matematicheskoy fiziki [The equations of mathematical physics], Nauka, Moscow, USSR.

32. Godunov, S.K. (1979), Uravneniya matematicheskoy fiziki [Equations of mathematical physics], Nauka, Moscow, USSR.

About the authors:

Minieiev Sergei Pavlovich, Doctor of Technical Sciences (D. Sc), Professor, Head of Department of Pressure Dynamics Control in Rock, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Prusova Alla Andreevna, Candidat of Technical Sciences (Ph.D.), Senior Researcher of Department of Pressure Dynamics Control in Rock, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sapegin Vladimir Nikolaevich, Candidat of Technical Sciences (Ph.D.), Senior Researcher of Department of Pressure Dynamics Control in Rock, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Yanzhula Aleksey Sergeevich, Master of Sciences (M.S.), Engineer in of Departament of Pressure Dynamics Control in Rocks, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kyshkan Maxim Aleksandrovich, Master of Sciences (M.S.), Engineer in of Departament of Pressure Dynamics Control in Rocks, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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