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Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

Author

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  • Skoczylas Norbert

    (The Strata Mechanics Research Institute of the Polish Academy of Sciences, Reymonta 27, 30-059 Kraków, Poland)

  • Anna Pajdak

    (The Strata Mechanics Research Institute of the Polish Academy of Sciences, Reymonta 27, 30-059 Kraków, Poland)

  • Katarzyna Kozieł

    (The Strata Mechanics Research Institute of the Polish Academy of Sciences, Reymonta 27, 30-059 Kraków, Poland)

  • Leticia Teixeira Palla Braga

    (The Strata Mechanics Research Institute of the Polish Academy of Sciences, Reymonta 27, 30-059 Kraków, Poland)

Abstract

The goal of this paper is to analyze the phenomenon of gas emission during a methane and coal outburst based on the unipore Crank diffusion model for spherical grains and plane sheets. Two occurrences in the Upper Silesian Coal Basin were analyzed: an outburst in a Zofiówka coal mine in 2005 and an outburst in a Budryk coal mine in 2012. Those two outbursts differed considerably. The first one was connected with an unidentified tectonic disturbance in the form of a triple, interlocking fault, and the other one is an example of an outburst in an area free from tectonic disturbances. The model analysis required laboratory tests in order to determine the sorption properties of coals from post-outburst masses. Sorption isotherms and the values of the effective diffusion coefficient were specified. The post-outburst masses were subjected to sieve analysis and the grain composition curves were plotted. The researchers also used the measurement data provided by proper mine services, such as the methane content, the volume of post-outburst masses, and the time courses of CH 4 concentration changes in excavations. They were recorded by methane measurement systems in the mines.

Suggested Citation

  • Skoczylas Norbert & Anna Pajdak & Katarzyna Kozieł & Leticia Teixeira Palla Braga, 2019. "Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model," Energies, MDPI, vol. 12(10), pages 1-22, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1999-:d:234130
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    References listed on IDEAS

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    1. Mateusz Kudasik & Norbert Skoczylas & Anna Pajdak, 2017. "The Repeatability of Sorption Processes Occurring in the Coal-Methane System during Multiple Measurement Series," Energies, MDPI, vol. 10(5), pages 1-15, May.
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    Cited by:

    1. Zhenhua Yang & Chaojun Fan & Tianwei Lan & Sheng Li & Guifeng Wang & Mingkun Luo & Hongwei Zhang, 2019. "Dynamic Mechanical and Microstructural Properties of Outburst-Prone Coal Based on Compressive SHPB Tests," Energies, MDPI, vol. 12(22), pages 1-16, November.
    2. Norbert Skoczylas & Anna Pajdak & Mariusz Młynarczuk, 2019. "CO 2 Adsorption–Desorption Kinetics from the Plane Sheet of Hard Coal and Associated Shrinkage of the Material," Energies, MDPI, vol. 12(20), pages 1-20, October.
    3. Hongtao Liu & Linfeng Guo & Xidong Zhao, 2020. "Expansionary Evolution Characteristics of Plastic Zone in Rock and Coal Mass Ahead of Excavation Face and the Mechanism of Coal and Gas Outburst," Energies, MDPI, vol. 13(4), pages 1-13, February.
    4. Katarzyna Kozieł & Norbert Skoczylas & Krzysztof Soroko & Sebastian Gola, 2020. "Gas and Dolomite Outbursts in Ore Mines—Analysis of the Phenomenon and the Energy Balance," Energies, MDPI, vol. 13(11), pages 1-19, June.

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