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Analysis of Stress and Deformation on Surrounding Rock Mass of a Trapezoidal Roadway in a Large Inclination Coal Seam and Novel High Yielding Prop Support: A Case Study

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  • Yang Hao

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
    School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
    School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Chunhui Liu

    (School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Yu Wu

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
    School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Hai Pu

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
    School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Kai Zhang

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
    School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China)

  • Lingling Shen

    (School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

Trapezoidal roadways in large inclination coal seams show asymmetrical tectonic characteristics, while there is still a lack of theoretical results on stress, deformation, and efficient and effective supporting methods on high walls. In this paper, based on the geological characteristics of a large, inclined coal seam roadway, a mechanical model for stress–deformation analysis of trapezoidal section roadway was established. Complex analysis and a comfort map were employed to investigate the stress and deformation distribution on the roadway surface, and a novel yielding prop with high load capacity and constant working resistance was employed to support a high wall side based on analytical results. The results are as follows: (1) The deformation of the high wall is larger than that of the low wall, and the deformation of the roof is larger than that of the floor. The overall deformation of the surrounding rock shows that the rib closure is larger than the roof-to-floor closure. (2) The stress of the surrounding rock shows that both horizontal and vertical stresses are highest in the upper corner, indicating that the broken zone is most likely to occur at this location. (3) A new support employed with a high-yielding prop and a high-strength cable in a large, inclined angle roadway is proposed. On-site experiments were conducted in a large 5-1081 roadway of a coal mine in Shanxi, China. Under the influence of mining disturbance, the deformations at the top corner decreased by 40% compared with before. The test results show that the new support scheme can effectively control the development of roadway deformation and damage during the mining process. The new support also shows friendly environmental support and fast installation.

Suggested Citation

  • Yang Hao & Chunhui Liu & Yu Wu & Hai Pu & Kai Zhang & Lingling Shen, 2023. "Analysis of Stress and Deformation on Surrounding Rock Mass of a Trapezoidal Roadway in a Large Inclination Coal Seam and Novel High Yielding Prop Support: A Case Study," Mathematics, MDPI, vol. 11(2), pages 1-19, January.
    • Handle: RePEc:gam:jmathe:v:11:y:2023:i:2:p:319-:d:1028232
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    References listed on IDEAS

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    1. Linli Long & Ying Liu & Xiaoyang Chen & Junting Guo & Xinhui Li & Yangnan Guo & Xuyang Zhang & Shaogang Lei, 2022. "Analysis of Spatial Variability and Influencing Factors of Soil Nutrients in Western China: A Case Study of the Daliuta Mining Area," Sustainability, MDPI, vol. 14(5), pages 1-18, February.
    2. Chao Chen & Jian Zhou & Tao Zhou & Weixun Yong, 2021. "Evaluation of vertical shaft stability in underground mines: comparison of three weight methods with uncertainty theory," 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. 109(2), pages 1457-1479, November.
    3. Xue-yang Sun & Chun-Hsing Ho & Cheng Li & Yucheng Xia & Qi Zhang, 2020. "Inclination effect of coal mine strata on the stability of loess land slope under the condition of underground mining," 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. 104(1), pages 833-852, October.
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