Thermodynamic changes in the coal matrix – gas – moisture system under pressure release and phase transformations of gas hydrates

V. V. Dyrdin, V. G. Smirnov, T. L. Kim, A. Yu Manakov, A. A. Fofanov, I. S. Kartopolova

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)206-214
Number of pages9
JournalRussian Physics Journal
Volume60
Issue number2
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • Coal
  • Gas dynamic phenomena
  • Gas hydrates
  • Methane
  • Sorption

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