Bezruchko K.А, Burchak О.V., Prykhodchenko S.Yu., Slobodiannykova V.K. Hypothesis about physical-chemical nature of gas-dynamic phenomena in coal mines
- Details
- Parent Category: Geo-Technical Mechanics, 2021
- Category: Geo-Technical Mechanics, 2021, Issue 156
Geoteh. meh. 2021, 156, 12-23
https://doi.org/10.15407/geotm2021.156.012
HYPOTHESIS ABOUT PHYSICAL-CHEMICAL NATURE OF GAS-DYNAMIC PHENOMENA IN COAL MINES
1Bezruchko K.А., 1Burchak О.V., 1Prykhodchenko S.Yu.,1Slobodiannykova V.K.
1Institute of Geotechnical Mechanics named by N. Poljakov of NAS of Ukraine
UDC 622.831.332:541.1
Language: Ukrainian
Abstract. Practical experience in the development of a gas-saturated coal-rock massif, as well as the results of scientific research, point to the imperfection of the existing ideas regarding the processes in the extremely stressed coal-rock massif, mechanisms of the occurrence and behavior of gas-dynamic phenomena (GDP).
The conducted analysis for the problem state regarding the nature and mechanism of sudden outbursts of coal, rocks and gas, in general, confirm that the outburst hazard was due to the complex interaction of three main natural factors (stress state, gas factor and physical-mechanical properties of rocks) with technological ones, and the formation of outburst hazardous conditions occurs in geological environments that are characterized by certain properties and conditions.
The purpose of the paper is to obtain new theoretical understanding of the GDP nature with taking into account geological conditions and the impact of external factors by developing a hypothesis regarding the physicochemical nature of the GDP.
It is proved that relief of stresses arisen in the molecular structure under the impact of geological factors leads to the activation of relaxation processes in the substance. The relaxation of the accumulated energy system results in structural transformations with the release of low-molecular-weight compounds. According to this pattern, accumulation of gases genetically connected with fossil organic matter and the emergence of gas-dynamic phenomena.is formed in the coal-rock massif.
The key point of the hypothesis is that partial stress relief of the coal-rock massif creates in the fractured zones of the coal bed conditions for relaxation of elastic energy accumulated in the molecular structure of coal, hence, promoting the activation of structural transformations by the free-radical mechanism, which results in the release of low-molecular-weight compounds (methane, in particular). Under appropriate conditions, in the zone of relaxation of elastic deformations, the process can assume an avalanche character, namely, initiate sudden outbursts of coal and gas.
According to the physicochemical model of methane release in coal under the impact of geomechanical, geological, and technogenic factors, which is proposed within the framework of this work, partial discharge creates in the coal bed conditions for relaxation of the elastic energy accumulated in the molecular structure of coal. That is, it promotes the activation of structural transformations by the free-radical mechanism, the result of which is the release of low-molecular-weight compounds (methane). Under the condition of sufficiently high fracturing of the elastic deformation zone, the process acquires an avalanche character, that is, sudden outbursts of coal and gas are developed.
Keywords: coal, coal mines, gas-dynamic phenomena, outbursts of coal and gas, stress-strain state.
REFERENCES:
1. Bulat, A. F., Zviagilskiy, E. L., Lukinov, V. V. et. al. (2008), Ugleporodnyu massiv Donbassa kak geterogennaya sreda[Donbass coal massif as a heterogeneous environment], Naukova dumka, Kiev, Ukraine.
2. Baohai Yu., Chengxiang Su., Deming Wang. Study of the features of outburst caused by rock cross-cut coal uncovering and the law of gas dilatation energy release / International Journal of Mining Science and Technology. Vol. 25. Issue 3. May 2015. P. 453–458. https://doi.org/10.1016/j.ijmst.2015.03.020
3. Coal and gas outburst dynamic system / Fan Chaojun, Li Sheng, Luo Mingkun and others / Journal of Mining Science and Technology. 2017. Vol. 27 P. 49–55. https://doi.org/10.1016/j.ijmst.2016.11.003
4. Lu Wei Dong, Ji Ren Wang, Ju Yi Wen. Microscopic Mechanism of Adsorption–Desorption in Coal and Gas Outburst Process / Journal of Nanoscience and Nanotechnology. 2017. Vol. 17, Num. 9. P. 6894–6898. https://doi.org/10.1166/jnn.2017.14460
5. The impacts of stress on the chemical structure of coals: a mini-review based on the recent development of mechanochemistry / Quanlin Houa, Yuzhen Hana, Jin Wangb and others / Science Bulletin, Vol. 62, Iss. 13, 2017, P. 965–970. https://doi.org/10.1016/j.scib.2017.06.004
6. Shi, X., Song, D. and Qian, Z. (2017), "Classification of coal seam outburst hazards and evaluation of the importance of influencing factors", Open Geosciences, vol. 9, pp. 295-301. https://doi.org/10.1515/geo-2017-0024
7. Wang, Ch., Yang, Sh., Yang, D., Li, X., Jiang, Ch. (2018), "Experimental analysis of the intensity and evolution of coal and gas outbursts", Fuel, vol. 226, 15 August 2018, pp. 252-262. https://doi.org/10.1016/j.fuel.2018.03.165
8. An, F., Yuana, Yu, Chenacd, X., Lia, Z. and Li, L. (2019), "Expansion energy of coal gas for the initiation of coal and gas outbursts", Fuel, vol. 235, 1 January 2019, pp. 551-557. https://doi.org/10.1016/j.fuel.2018.07.132
9. Hou, Ch., Zhang, Y. and Yan, Yi. (2019), "Effects of coal seam dip angle on the outburst in coal roadway excavation", International Journal of Mining Science and Technology, vol. 29, issue 5, September 2019, pp. 757-764. https://doi.org/10.1016/j.ijmst.2019.08.001
10. Cao, J., Dai, L., Sun, H., Wang, B., Zhao, B., Yang, X. and Zhao, X. (2019), "Experimental study of the impact of gas adsorption on coal and gas outburst dynamic effects", Process Safety and Environmental Protection, vol. 128, August 2019, pp. 158-166. https://doi.org/10.1016/j.psep.2019.05.020
11. Zykov, V.S. snd Abramov, I.L. (2015), “Clarification of the classification of dynamic phenomena in coal mines”, Vestnik, no. 3, pp. 74–83.
12. Kiryaeva, T.A. (2015), “Variability of the physical and chemical properties of a coal seam as a sign of its increased outburst hazard”, Interekspo Geo-Sibir, vol. 2, no. 2, pp. 8–12.
13. Smirnov, V.G., Dyrdin, V.V., Ismagilov, Z.R. et al. (2017), “On the influence of the forms of the connection of methane with a coal matrix on the gas-dynamic phenomena arising from underground mining of coal seams”, Vestnik, vol. 1, pp. 34–40. https://doi.org/10.26631/arc1-2017-34-41
14. Larin, M.K. (2018), “Analysis of methods and means of forecasting and preventing sudden emissions of coal and gas in coal mines”, Vestnik Sibirskogo industrialnogo un-ta, no. 3 (25), pp. 54–57.
15. Kolesnichenko, I.E., Artemiev, V.B. and Kolesnichenko, E.A. (2019), “The evolution of methods for studying methane safety in the development of coal seams”, Ugol, no. 7 pp. 36–41. https://doi.org/10.18796/0041-5790-2019-7-36-41
16. Larin, M.K., Rozum, I.G. and Bushuev, K.I. (2019), “Types and causes of gas-dynamic phenomena in coal mines”, Vestneik Sibirskogo industrialnogo un-ta, no. 4 (30), pp. 25–27.
17. Ganova, S.D., Skopintceva, O.V. and Isaev, O.N. (2017), “On the study of the composition of hydrocarbon gases in coal seams and dust in order to predict their potential hazard”, Izvestiya Tomskogo politekhnicheskogo un-ta, vol. 330, no. 6. pp. 109–115.
18. Dennis, J. Black (2017), "Investigations into the identification and control of outburst risk in Australian underground coal mines", International Journal of Mining Science and Technology, vol. 27, pp. 749-753. https://doi.org/10.1016/j.ijmst.2017.07.006
19. Dennis, J. Black (2019), "Review of coal and gas outburst in Australian underground coal mines", International Journal of Mining Science and Technology, vol. 29, pp. 815-824. https://doi.org/10.1016/j.ijmst.2019.01.007
20. Nilufer, K. and Onder, M. (2019), "Application of structural equation modeling to evaluate coal and gas outbursts", Tunnelling and Underground Space Technology, June 2019, vol. 88, pp. 63-72. https://doi.org/10.1016/j.tust.2019.02.017
21. Hou, Ch., Zhang, Y. and Yan, Y. (2019), "Effects of coal seam dip angle on the outburst in coal roadway excavation International", Journal of Mining Science and Technology, vol. 29, pp. 757-764. https://doi.org/10.1016/j.ijmst.2019.08.001
22. Bulat, A.F. and Dyrda, V.I. (2013), “Sudden outbursts of coal and gas in the context of nonlinear nonequilibrium thermodynamics”, Ugol Ukrainy, no. 12, pp. 24–33.
23. Bulat, A.F. and Dyrda, V.I. (2013), “Some problems of gas-dynamic phenomena in coal massif in the context of nonlinear nonequilibrium thermodynamics”, Geo-Technical Mechanics, no. 108, pp. 3–31.
24. Bulat, A.F., Lukinov, V.V., Pimonenko, L.I. et. al. Geologicheskiye osnovy i metody prognoza vybrosoopasnosti uglya, porod i gaza [Geological foundations and methods for forecasting the outburst hazard of coal, rocks and gas], Monolit, Dnepropetrovsk, Ukraine.
25. Bulat, A.F., Bezruchko, K.A., Pimonenko, L.I. et. al. “A new physical-geological model of the genesis of сoal-methane, methane and prospects for the development”, Ugol Ukrainy, no. 4, pp. 29–34.2014.
26. Burchak, O.V., Primin, M.A., Nedaivoda, I.V. et. al. “The inflow of new officials to the camp of the great speech”, Geo-Technical Mechanics, no. 124, pp. 97–105.
27. Bezruchko, K.A., Pymonenko, L.I., Burchak, A.V. et al. (2018), “Transformation of the energy state of the molecular structure of coal in the process of metamorphism”, JournalofGeology, GeografyandGeoecology, №1 (27), pp. 30-34. https://doi.org/10.15421/111827
28. Zviagilskiy, E.L., Bobryshev, V.V. and Bobryshev, V.V. (2002), “The effect of the natural anti-gas barrier and its role in the formation of the gas balance of the lava and the peculiarities of the operation of surface degassing wells”, Geo-Technical Mechanics, no. 37, pp. 162–177.
29. Chetverik, M. S., Androshchuk, E.V., Bubnova, E.A. et al. (2003). “Displacement of the rock mass and the effect of the rate of movement of the cleaning face on the release of methane”, Sbornik nauchykh trudov NGU, №16, pp. 42–53.
30. Petruk, E. G. (1994), “Control of deformation processes in a dynamic shear trough in underground mining of shallow coal seams”, Abstract of D. Sc. dissertation, Mine surveying, NGU, Dnepropetrovsk, Ukraine.
31. Usachenko, B.M. and Skipochka, S.І. (1988), “Stress-strain state of pillars during the development of thick shallow seams”, Gornyu zhurnal, no. 3, pp. 50–52.
32. Kuchin, O.S. (2015), “Features of vertical deformation of the rock mass over the split furnace in the conditions of the Western Donbass”, Vіsnyk ZHDTU, no. 3 (74), pp. 119–123.
33. Kolchik, E. I. (2009), “Displacements of the earth's surface at high rates of mining of coal seams”, Fiziko-tekhnicheskie problemy gornogo proizvodstva, no. 12, pp. 47–54.
34. Antoshchenko, N.I., Filimonov, P.E. and Bokiy, B.V. (2013), Geomekhanicheskie i tekhnologicheskie usloviya gazodinamicheskikh protsessov v ugolnykh shakhtakh [Geomechanical and technological conditions of gas-dynamic processes in coal mines], DonGTU, Alchevsk, Ukraine.
35. Feyt, G. N. and Malinnikova, O.N. (2007), “Features and patterns of geomechanical and physicochemical processes of formation of centers of danger of gas-dynamic phenomena in mines”, GIAB Metan, no. S13. pp. 192–205.
36. Artemiev, V.B., Eremin, I.V. and Lisurenko, A.V. (1999), Usloviya obrazovaniya i kharakternye priznaki dinamiki aktivnykh ugley [Conditions of formation and characteristic features of the dynamics of active coals], Nedra kommiunikeishchens LTD, Moscow, Russia.
37. Miuller, R.L. and Popov, V.S. (1957), “On the kinetics of gas release in connection with the problem of coal metamorphism”, Zhurnal pricladnoy khimii, no. 2 (30), p. 271.
38. Landau, L. D. and Lifshitc, E. M. (1964), Statisticheskaya fizika [Statistical physics], Nauka, Moscow, USSR.
39. Giulmaliev, A. M., Golovin, G. S. and Gladun, T. G. (2003), Teoreticheskie osnovy khimii uglya [Theoretical fundamentals of the chemistry of coal], Izd–vo MGGU, Moscow, Russia.
40. Sarahnchuk, V.I., Ayruni, A.T. and Kovalev, K.E. (1988), Nadmolekulyarnaya organizatsiya, struktura i svoystva uglya [Supramolecular organization, structure and properties of coal], Naukova dumka, Kiev, USSR.
41. Rusiyanova, N.D. (2003), Uglekhimiya [Coal chemistry], Nauka, Moscow, Russia.
42. Regel, V.R., Slutcker, A.I. and Tomashevskiy, E.E. (1974), Kineticheskaya teoriya prochnosti tverdykh tel [Kinetic theory of strength of solids], Nauka, Moscow, USSR.
43. Falbe, I.U. (1980), Khimicheskie veshchestva iz uglya [Chemicals from coal], Khimiia, Moscow, USSR.
44. Dashevskiy, V.G. (1987), Konformatsionnyu analiz makromolekul [Conformational analysis of macromolecules], Nauka, Moscow, USSR.
About the authors:
Bezruchko Kostiantyn Andriivych, Doctor of Geology Science (D.Sc), Senior Researcher, Head of Department of Geology of Coal Beds at Great Depths, 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.
Burchak Oleksandr Vasylyovyсh, Doctor of Technic Science (D.Sc), Senior Researcher, Senior Research in Department of Geology of Coal Beds at Great Depths, 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. ,
Prykhodchenko Svitlana Yuriivna, Candidate of Geology Science (Ph.D), Senior Researcher of Department of Geology of Coal Beds at Great Depths, 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.
Slobodiannykova Valentyna Kuzmivna, Master of Science,Principal Specialistof Department of Geology of Coal Beds at Great Depths, 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.