Науковий вісник НГУ

Assessment of the influence of the surface layer of coals on gas-dynamic phenomena in the coal seam

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Content №2 2024

Last Updated on 01 May 2024

Published on 30 November -0001

Hits: 2407

Authors:

A.D.Maussymbayeva, orcid.org/0000-0002-7214-8026, Kazakh multidisciplinary reconstruction and development institute, Karaganda, Republic of Kazakhstan

V.M.Yurov, orcid.org/0000-0002-7918-9656, Karaganda Buketov University, Karaganda, Republic of Kazakhstan

V.S.Portnov, orcid.org/0000-0002-4940-3156, Non-profit joint-stock company “Abylkas Saginov Karaganda Technical University”, Karaganda, Republic of Kazakhstan

M.Rabatuly*, orcid.org/0000-0002-7558-128X, Non-profit joint-stock company “Abylkas Saginov Karaganda Technical University”, Karaganda, Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

G.M.Rakhimova, orcid.org/0000-0003-0947-0212, Non-profit joint-stock company “Abylkas Saginov Karaganda Technical University”, Karaganda, Republic of Kazakhstan

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (2): 005 - 011

https://doi.org/10.33271/nvngu/2024-2/005

Abstract:

Purpose. Development of physical and mathematical model linking nanostructured surface layer of coal substance with geodynamic phenomena of coal seam, through adhesion energy of different layers and coal grades, melting temperature of the nanolayer, determination of the role of stress-strain state of the seam in the formation of fine coal and methane at their emissions into the mine workings.

Methodology. Mathematical and experimental studies of the regular change in the surface layer of coal substance depending on the grade of coals for different formations of the Karaganda basin; assessment of the influence of the surface layer of coal on the adhesion energy, which determines the stress-strain state of the coal seam. Physical methods for studying the decomposition temperature of methane-bearing coal seams, changes in its concentration, reaction rate of methane release from coals.

Findings. A regular decrease in the thickness of the surface nanolayer of coal substance in different coal grades and formations in the metamorphic series of coals is shown. It has been found that this decrease is accompanied by an increase in surface energy and adhesion energy. The connection of gas-dynamic phenomena with stress-strain state of coal seam, which forms fine-dispersed structure of coal, forms of methane location, activation energy of solid coal-methane solution, rate of thermal decomposition reaction, critical stresses determining development of cracks in coal substance is shown.

Originality. For the first time, a physical model for calculating the thickness of the surface nanolayer and its surface energy for coals of different grades of the Karaganda basin has been developed; the relationship between the thickness of the nanolayer and the melting temperature, adhesion energy, linking the stress-strain state of the coal bed in the zone of gas-dynamic phenomena and the concentration of methane has been established. The value of internal stresses in the surface layer of coals of different grades has been found to be a constant value. Connection of activation energy of decomposition of solid coal-methane solution from Gibbs energy and methane concentration, which explains its significant amount in gas-dynamic phenomena, has been established.

Practical value. The physical and mathematical model describes the influence of surface coal on the processes occurring in the zone of gas-dynamic phenomena and the regularities of their changes depending on the thickness of the surface nanolayer determining such parameters as: stress-strain state, dispersion of coals, as well as the release of a large amount of methane at the sudden release of coal gas into the mine workings.

Keywords: gas-dynamic phenomenon, coal grades, adhesion, Gibbs energy, methane, cracks, temperature

References.

1. Voloshin, N. E., Weinstein, L. A., Brukhanov, A. M., Kushch, O. A., Boiko, Ya. N., Rubinskii, A. A., & Rixnichenko, A. I. (2008). Emissions of coal, rock in the mines of Donbass in 1906–2007. Donetsk: SPD Dmitrenko. Retrieved from https://drive.google.com/file/d/1OSLAoEsmOLsLdI0wFodUl3-fb5JS5pk4/view.

2. Nikolin, V. I., Podkopaev, S. V., Khudoley, O. G., & Maleev, N. V. (2011). Geomechanical regularities of manifestations of rock pressure in deep mines. Donetsk.

3. Bulat, A. F., & Dyrda, V. I. (2013). Some problems of gas-dynamic phenomena in coal massif in the context of nonlinear nonequilibrium thermodynamics. IGTM NAS of Ukraine, 3-31.

4. Korol, V. I., & Skobenko, A. V. (2013). Acoustic method of forecasting of gas dynamic phenomena in coal mines: monography. Dnipro: National Mining University.

5. Antsiferov, A. V., Tirkel, M. G., Gorniak, Z. V., Marmalev­sky, N. Ya., Kostyukevich, A. S., & Khromova, I. Yu. (2009). Application of duplex wave migration for fracture zone delineation in coalbed methane prospecting in Donbass. Scientific works of Ukrnimi NAS of Ukraine, 5 (Part 1), 201-214.

6. Drizhd, N. A., & Rabatuly, M. (2020). The results of the development of pilot wells in the sherubainurinsky site of the Karaganda coal Basin. Ugol, (6), 36-40. https://doi.org/10.18796/0041-5790-2020-6-36-40.

7. Sobolev, V. V., Baskevich, A. S., & Filippov, A. O. (2012). Electrochemical activation and stability of nanostructured components of hard coal. Dopovidi NAS Ukraine, (1), 89-94. Retrieved from https://www.sworld.com.ua/konfer27/405.pdf.

8. Chen, L., Wang, E., Ou, J., & Fu, J. (2017). Coal and gas outburst hazards and factors of the No.B-1 Coalbed, Henan, China. Geosciences Journal, 22, 171-182. https://doi.org/10.1007/s12303-017-0024-6.

9. Portnov, V., Yurov, V., Reva, M., Maussymbaeva, A., & Imanbaeva, S. (2021). Nanostructures in surface layers of coal substance. Bulletin of Taras Shevchenko National University of Kyiv. Geology, 4(95), 54-62.

10. Yurov, V. M. (2005). Thermodynamics of luminescent systems. Vestnik KarGU. Series Physics, 3(39), 13-16.

11. Mamonova, M. V., Prudnikov, V. V., & Prudnikova, I. A. (2013). Surface Physics: Theoretical Models and Experimental Methods. CRC Press. https://doi.org/10.1201/b16249.

12. Portnov, V., Yurov, V., Reva, M., Maussymbaeva, A., & Imanbaeva, S. (2021). Nanostructures in surface layers of coal substance. Bulletin of Taras Shevchenko National University of Kyiv. Geology, 4(95), 54-62.

13. Mullagaliyeva, L. F., Baimukhametov, S. K., Portnov, V. S., & Yurov, V. M. (2022). Nanostructures of coal beds in the She­ru­bay­nurinsky section of the Karaganda basin. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (4), 17-22. https://doi.org/10.33271/nvngu/2022-4/017.

14. Haijun, G., & Yingjie, Y. (2024). Experimental study on the desorption law and diffusion kinetic characteristics of gas in raw coal and tectonic coal. Energy, 289. 129924. https://doi.org/10.1016/j.energy.2023.129924.

15. Fathabadi, M. V., Rafsanjai, H. H., & Danafar, F. (2018). Experimental Study on Catalytic Effect of Iron Compounds During Synthesis of Carvul iaosuumies From Coal. Iranian Journal of Analytical Chemistry, 5(1), 39-43. https://doi.org/20.1001.1.23832207.2018.5.1.6.3.

16. Reddy, B. R., Ashok, I., & Vinu, R. (2020). Preparation of carbon nanostructuresfrom medium and high ash Indian coals via microwave-assisted pyrolysis. Advanced Powder Technology, 31(3), 1229-1240. https://doi.org/10.1016/j.apt.2019.12.017.

17. Jia, T., Liu, C., Wei, G., Yan, J., Zhang, Q., Niu, L., …, & Zhang, Y. (2021). Micro- Nanostructure of Coal and Adsorption-Diffusion Characteristics of Methane. Journal of Nanoscience and Nanotechnology, 21(1), 422-430. https://doi.org/10.1166/jnn.2021.1873.

18. Sun, Y., Yuan, L., & Zhao, Y. (2018). CO₂-ECBM in coal nanostructure: Modelling and simulation. Journal of Natural Gas Science & Engineering, 54, 202-215. https://doi.org/10.1016/j.jngse.2018.04.007.

19. Harpalani, S., & Schraufnagel, R. A. (1990). Shrinkage of coal matrix with release of gas and its impact on permeability of coal. Fuel, 69(5), 551-556. https://doi.org/10.1016/0016-2361(90)90137-F.

20. Moskalets, M. V. (2010). Fundamentals of mesoscopic physics. Kharkov: NTU-HP I.

21. IUPAC Manual of Symbols and Terminology (1971). Pure and Applied Chemistry, 31. Retrieved from https://publications.iupac.org/pac/pdf/1972/pdf/3104x0577.pdf.

22. Griffith, A. A. (1921). The Phenomena of Rupture and Flow in Solids. Philosophical Transactions of the Royal Society of London Series A, Containing Papers of a Mathematical or Physical Character, 221, 163-198. https://doi.org/10.1098/rsta.1921.0006.

23. Buzhuang, Zh., & Shengqiang, Y. (2019). Experimental study on the influence of coal oxidation on coal and gas outburst during invasion of magmatic rocks into coal seams. Process Safety and Environmental Protection, 124, 213-222. https://doi.org/10.1016/j.psep.2019.02.017.

24. Chen, Sh., & Zhu, Y. (2012). Influence of magma intrusion on gas outburst in a low rank coal mine. International Journal of Mining Science and Technology, 22(2), 259-266. https://doi.org/10.1016/j.ijmst.2012.03.004.

25. Dias, R. F., Lewan, M. D., Birdwell, J. E., & Kotarba, M. J. (2014). Differentiation of preexisting trapped methane from thermogenic methane in an igneous-intruded coal by hydrous pyrolysis. Organic Geochemistry, 67, 1-7. https://doi.org/10.1016/j.orggeochem.2013.11.010.

26. Jiang, J. Y., Yuanping, Ch., Lei, W., Fenghua, A., & Haina, J. (2011). Effect of magma intrusion on the occurrence of coal gas in the Wolonghu coalfield. Mining Science and Technology (China), 21(5), 737-741. https://doi.org/10.1016/j.mstc.2011.10.002.

27. Qin, Y. (2008). Mechanism of CO₂ enhanced CBM recovery in China: a review. Journal of China University of Mining and Technology, 18(3), 406-412. https://doi.org/10.1016/S1006-1266(08)60085-1.

• Next >