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Expansionary Evolution Characteristics of Plastic Zone in Rock and Coal Mass Ahead of Excavation Face and the Mechanism of Coal and Gas Outburst

Author

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  • Hongtao Liu

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Linfeng Guo

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Xidong Zhao

    (School of Safety Engineering, North China Institute of Science & Technology, Beijing 101601, China)

Abstract

Factors leading to coal and gas outbursts are complicated, and the accuracy of predicting outbursts remains difficult to achieve. Therefore, coal and gas outburst risk are still a scientific challenge in the fields of mining, geology, safe engineering, and rock mechanics. Theories explaining and predicting coal and gas outbursts associated with restored strain and gas energy are hot topics. Based on numerical modelling, the evolution of a plastic zone ahead of an excavation face with change of direction and magnitude of regional pre-mining stress field were analyzed. A mechanical analysis model for the expansionary evolution process of the plastic zone ahead of the excavation face was constructed, and the expansionary evolution characteristics of plastic zone ahead of the excavation face were analyzed. The physical and mechanical process and basic conditions for the initiation and development of coal and gas outbursts induced by evolution of plastic zone were discussed. The research provides some new insights into the mechanism, prediction, and prevention of goal and gas outbursts.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:984-:d:323962
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    References listed on IDEAS

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    1. 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.
    2. Abdullah Fisne & Olgun Esen, 2014. "Coal and gas outburst hazard in Zonguldak Coal Basin of Turkey, and association with geological parameters," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(3), pages 1363-1390, December.
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    Cited by:

    1. Zheng Wu & Jun Li & Wen-Long Zhang & Chen Li, 2022. "Analysis of the Failure Characteristics and Main Controlling Factors of Surrounding Rocks Using the Standard Specimen with a Pre-Existing Hole," Sustainability, MDPI, vol. 14(21), pages 1-18, November.
    2. Junqi Zhu & Li Yang & Xue Wang & Haotian Zheng & Mengdi Gu & Shanshan Li & Xin Fang, 2022. "Risk Assessment of Deep Coal and Gas Outbursts Based on IQPSO-SVM," IJERPH, MDPI, vol. 19(19), pages 1-22, October.

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