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Failure Mechanism Analysis and Support Technology for Roadway Tunnel in Fault Fracture Zone: A Case Study

Author

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  • Kai Wang

    (School of Civil Engineering and Architecture, Henan University, Kaifeng 475000, China)

  • Lianguo Wang

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

  • Bo Ren

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

Abstract

This paper introduces a case study on the failure mechanism and support design of a roadway tunnel in the fault fracture zone of the 106 mining area in the Yuandian no.2 coal mine. Based on the on-site geological conditions (in-situ stress test, borehole television imaging, and lithological analysis), the failure mechanism of the roadway tunnel in the fault fracture zone was studied. The test results showed that the high tectonic stress, fractured rock, and poor lithology are the primary reasons for the roadway instability. According to the support principles of grouting reinforcement, pre-reinforced support, and rational support range, a new type of combined support technology was proposed, including advanced grouting, grouting bolts, and grouting anchor cables. A 100 m roadway section was selected for field testing using the new support scheme, and detailed deformation monitoring was performed. Monitoring results showed that the roadway deformation under the new support was significantly reduced. During the roadway excavation process, no roof collapse phenomenon occurred, and the safety of roadway excavation was ensured. This successful case provides an important reference for similar roadway projects in the fault fracture zone.

Suggested Citation

  • Kai Wang & Lianguo Wang & Bo Ren, 2021. "Failure Mechanism Analysis and Support Technology for Roadway Tunnel in Fault Fracture Zone: A Case Study," Energies, MDPI, vol. 14(13), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:3767-:d:580542
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    References listed on IDEAS

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    1. Małkowski Piotr & Ostrowski Łukasz & Bachanek Piotr, 2017. "Modelling the Small Throw Fault Effect on the Stability of a Mining Roadway and Its Verification by In Situ Investigation," Energies, MDPI, vol. 10(12), pages 1-21, December.
    2. Deyu Qian & Nong Zhang & Dongjiang Pan & Zhengzheng Xie & Hideki Shimada & Yang Wang & Chenghao Zhang & Nianchao Zhang, 2017. "Stability of Deep Underground Openings through Large Fault Zones in Argillaceous Rock," Sustainability, MDPI, vol. 9(11), pages 1-28, November.
    3. Cun Zhang & Shihao Tu, 2016. "Control technology of direct passing karstic collapse pillar in longwall top-coal caving 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. 84(1), pages 17-34, October.
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    Cited by:

    1. Wadslin Frenelus & Hui Peng & Jingyu Zhang, 2022. "An Insight from Rock Bolts and Potential Factors Influencing Their Durability and the Long-Term Stability of Deep Rock Tunnels," Sustainability, MDPI, vol. 14(17), pages 1-35, September.
    2. Xiaoguang Qiao & Runxun Zhang & Lulu Zhang & Xinghua Zhang & Xiaogang Zhang, 2023. "Study on the Parameters of Strengthening Soft Surrounding Rock by Electric Pulse Grouting in the Mining Face," Sustainability, MDPI, vol. 15(3), pages 1-17, January.
    3. Guohua Zhang & Mengsen Liu & Tao Qin & Lei Wang & Yanwei Duan & Zibo Li, 2022. "Characteristics of Roof Collapse of Mining Tunnels in the Fault Fracture Zone and Distribution of the Boundary Force of the Accumulation Body," Sustainability, MDPI, vol. 14(24), pages 1-13, December.
    4. Hao Fan & Xingang Niu & Shaobo Li, 2022. "Failure Mechanism and Control Technology for Coal Roadway in Water-Rich Area," Sustainability, MDPI, vol. 15(1), pages 1-16, December.
    5. Yu Xiong & Dezhong Kong & Zhanbo Cheng & Zhijie Wen & Zhenqian Ma & Guiyi Wu & Yong Liu, 2021. "Instability Control of Roadway Surrounding Rock in Close-Distance Coal Seam Groups under Repeated Mining," Energies, MDPI, vol. 14(16), pages 1-19, August.

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