The physical processes occurring in the coal – natural gas system under the gas pressure release were studied experimentally. The possibility of gas hydrates presence in the inner space of natural coal was shown, which decomposition leads to an increase in the amount of gas passing into the free state. The decomposition of gas hydrates can be caused either by the seam temperature increase or the pressure decrease to lower than the gas hydrates equilibrium curve. The contribution of methane released during gas hydrates decomposition should be taken into account in the design of safe mining technologies for coal seams prone to gas dynamic phenomena.
Similar content being viewed by others
References
A. A. Fofanov and V. V. Dyrdin, Vestnik KuzGTU [in Russian], No. 3, 9–12 (2012).
I. L. Ettinger, Soviet Mining Science, 26, No. 2, 159–164 (1990).
V. G. Smirnov, V. V. Dyrdin, A. Yu. Manakov, et al., Izv. Vyssh. Uchebn. Zaved. Gorn. Zhurn. [in Russian], No. 1, 128–135 (2014).
A. T. Ayruni, Prediction and Prevention of Gas Dynamic Phenomena in Coal Mines [in Russian], Nauka, Moscow (1987).
A. D. Alekseev, The Physics of Coal and Mining [in Russian], Naukova Dumka, Kiev (2010).
V. G. Smirnov, A. Yu. Manakov, V. V. Dyrdin, and Z. R. Ismagilov, Vestnik KuzGTU [in Russian], No. 2, 27–30 (2014).
I. L. Ettinger, Bezop. Truda v Prom., No. 2, 30–32 (1974).
V. G. Smirnov, A. Yu. Manakov, Ukraintseva E. A., et al., Fuel, 166, 188–195 (2016).
V. A. Istomin and V. S. Yakushev, Gas Hydrates in Natural Conditions [in Russian], Nedra, Moscow (1992).
F. A. Kuznetsov, V. A. Istomin, and T. V. Rodionova, Ross. Khim. Zhurn. [in Russian], XLVII, No. 3, 5–18 (2003).
I. M. Vasenin, A. Yu. Krainov, V. A. Pichugin, and A. A. Cherepov, Izv. Vyssh. Uchebn. Zaved. Fiz., 55, No. 9/3, 27–29 (2012).
V. A. Pichugin, I. M. Vasenin, and A. Yu. Krainov, Izv. Vyssh. Uchebn. Zaved. Fiz., 56, No. 6/3, 155–157 (2013).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 8–15, February, 2017.
Rights and permissions
About this article
Cite this article
Dyrdin, V.V., Smirnov, V.G., Kim, T.L. et al. Thermodynamic Changes in the Coal Matrix – Gas – Moisture System Under Pressure Release and Phase Transformations of Gas Hydrates. Russ Phys J 60, 206–214 (2017). https://doi.org/10.1007/s11182-017-1063-1
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11182-017-1063-1