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Study on the Dip Angle Effect of Asymmetric Deformation and Failure of the Gob-Side Coal–Rock Roadway in Gently Inclined Coal Seam

Author

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  • Lin Gao

    (College of Mining, Guizhou University, Guiyang 550025, China
    Coal Mine Roadway Support and Disaster Prevention Engineering Research Center, Beijing 100083, China
    National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
    Key Laboratory of Mining Disaster Prevention and Control, Qingdao 266590, China)

  • Xinyu Zhan

    (College of Mining, Guizhou University, Guiyang 550025, China)

  • Pandong Zhang

    (College of Mining, Guizhou University, Guiyang 550025, China)

  • Zhijie Wen

    (Key Laboratory of Mining Disaster Prevention and Control, Qingdao 266590, China)

  • Zhenqian Ma

    (College of Mining, Guizhou University, Guiyang 550025, China
    National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China)

  • Dezhong Kong

    (College of Mining, Guizhou University, Guiyang 550025, China
    National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China)

  • Xiangtao Kang

    (College of Mining, Guizhou University, Guiyang 550025, China
    National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China)

  • Sen Han

    (College of Mining, Guizhou University, Guiyang 550025, China
    National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China)

Abstract

In order to reveal the influence law of coal seam dip angle on the stability of the surrounding rock of the gob-side coal–rock roadway in a gently inclined coal seam (GCRGICS), the deformation characteristics of the surrounding rock under four different coal seam dip angles of this kind of roadway were studied by field investigation, theoretical analysis and numerical simulation. The results showed that, with the increase of the coal seam dip angle, the amount of the roadway roof subsidence and the deformation of the upper and lower side arc triangle coal along the coal–rock interface increased, and the maximum deformation was 479 and 950 mm, respectively, and the maximum slip deformation area gradually shifted from the upper side arc triangle coal to the lower side arc triangle coal. The asymmetric deformation characteristics of the surrounding rock became more and more obvious. The asymmetric deformation rate of the GCRGICS showed a V-shaped variation relationship with the coal seam dip angle, when the coal seam dip angle was 10°, the asymmetric deformation rate was the minimum, only 1.1%. The plastic zone of the surrounding rock expanded with the increase of the coal seam dip angle, and the new extension range was mainly located in the roof area of the roadway.

Suggested Citation

  • Lin Gao & Xinyu Zhan & Pandong Zhang & Zhijie Wen & Zhenqian Ma & Dezhong Kong & Xiangtao Kang & Sen Han, 2022. "Study on the Dip Angle Effect of Asymmetric Deformation and Failure of the Gob-Side Coal–Rock Roadway in Gently Inclined Coal Seam," Sustainability, MDPI, vol. 14(12), pages 1-15, June.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:12:p:7299-:d:838963
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    Citations

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    Cited by:

    1. Yabin Wu & Jianhua Hu & Guanping Wen, 2022. "Study on Creep Characteristics of Water Saturated Phyllite," Sustainability, MDPI, vol. 14(19), pages 1-17, September.
    2. Huichen Xu & Xiaoming Sun & Yong Zhang & Chengwei Zhao & Chengyu Miao & Dong Wang, 2023. "Creep Characteristics of Layered Rock Masses after Water Absorption Due to Structural Effects," IJERPH, MDPI, vol. 20(5), pages 1-18, February.
    3. Linchao Dai & Zhigang Zhang & Haitao Sun & Huali Gao, 2022. "Research on Mechanical Properties and Energy Evolution Law of Coal–Rock Assemblage with Different Gas Pressures," Sustainability, MDPI, vol. 14(16), pages 1-11, August.

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