Basic Conclusions
1. The methane dissolved in natural coal may participate directly in the dynamic failure of the coal during sudden outbursts.
2. The following are factors determining the participation of dissolved methane in the failure of coal during outbursts: a high natural methane content, the fracture microstructure of the coal, and its low crack resistance.
3. It can be stated that it is precisely the dissolved methane that predetermines the formation of "mad flour."
The author expresses gratitude to S. V. Kuznetsov, V. A. Bobin, I. V. Zverev, V. A. Trofimov, and M. O. Dolgov for their discussion of the study.
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Additional information
Institute of Problems of the Complex Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 18–28, November–December, 1997.
The study was performed with financial support from the Russian Fund for Fundamental Research (Project No. 96-05-65884).
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Odintsev, V.N. Sudden outburst of coal and gas — failure of natural coal as a solution of methane in a solid substance. J Min Sci 33, 508–516 (1997). https://doi.org/10.1007/BF02765629
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DOI: https://doi.org/10.1007/BF02765629