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A Study of the Large Deformation Mechanism and Control Techniques for Deep Soft Rock Roadways

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  • Xiaojie Yang

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China
    These authors contributed equally to this work.)

  • Eryu Wang

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China
    These authors contributed equally to this work.)

  • Yajun Wang

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China)

  • Yubing Gao

    (State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China)

  • Pu Wang

    (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China
    Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai’an 271000, China)

Abstract

Large deformation control of deep soft rock roadways has been a major problem in mining activities worldwide. This paper considers the supporting problem related to large deformation of a deep soft rock roadway in Chao’hua coal mine. The discrete element simulation method (UDEC software) is adopted to simulate a tailgate of panel 31041 in Chao’hua coal mine. The failure patterns of unsupported and primary supported roadway are simulated, and these reveal the characteristics of deformation, stress and crack propagation. The excavation of roadway leads to high deviator stress, which exceeds the peak strength of shallow surrounding rock and causes it to enter the post-failure stage. Tensile failures then initiate and develop around the roadway, which causes the fragmentation, dilation and separation of shallow surrounding rock. The compressive capacity of the primary support system is low, which results in serious contraction in the full section of the roadway. An improved control scheme is put forward for the support of a tailgate. The underground test results confirm that the improved support system effectively controlled large deformation of the surrounding rocks, which can provide references for support in the design of roadways excavated in deep soft stratum.

Suggested Citation

  • Xiaojie Yang & Eryu Wang & Yajun Wang & Yubing Gao & Pu Wang, 2018. "A Study of the Large Deformation Mechanism and Control Techniques for Deep Soft Rock Roadways," Sustainability, MDPI, vol. 10(4), pages 1-20, April.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:4:p:1100-:d:139865
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    References listed on IDEAS

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    1. Lechner, Alex Mark & Kassulke, Owen & Unger, Corinne, 2016. "Spatial assessment of open cut coal mining progressive rehabilitation to support the monitoring of rehabilitation liabilities," Resources Policy, Elsevier, vol. 50(C), pages 234-243.
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    Cited by:

    1. Eryu Wang & Guangbo Chen & Xiaojie Yang & Guofeng Zhang & Wenbin Guo, 2020. "Study on the Failure Mechanism for Coal Roadway Stability in Jointed Rock Mass Due to the Excavation Unloading Effect," Energies, MDPI, vol. 13(10), pages 1-19, May.
    2. Jun Yang & Hongyu Wang & Yajun Wang & Binhui Liu & Shilin Hou & Yu Cheng, 2019. "Stability Analysis of the Entry in a New Mining Approach Influenced by Roof Fracture Position," Sustainability, MDPI, vol. 11(22), pages 1-16, November.
    3. Guangzhe Xue & Chao Gu & Xinqiu Fang & Tao Wei, 2019. "A Case Study on Large Deformation Failure Mechanism and Control Techniques for Soft Rock Roadways in Tectonic Stress Areas," Sustainability, MDPI, vol. 11(13), pages 1-24, June.
    4. Dong Wang & Yujing Jiang & Xiaoming Sun & Hengjie Luan & Hui Zhang, 2019. "Nonlinear Large Deformation Mechanism and Stability Control of Deep Soft Rock Roadway: A Case Study in China," Sustainability, MDPI, vol. 11(22), pages 1-20, November.
    5. Qingxian Huang & Xufeng Wang & Xuyang Chen & Dongdong Qin & Zechao Chang, 2020. "Evolution of Interior and Exterior Bearing Structures of the Deep-Soft-Rock Roadway: From Theory to Field Test in the Pingdingshan Mining Area," Energies, MDPI, vol. 13(17), pages 1-19, August.
    6. Qizhi Chen & Baoping Zou & Zhigang Tao & Manchao He & Bo Hu, 2023. "Construction and Application of an Intelligent Roof Stability Evaluation System for the Roof-Cutting Non-Pillar Mining Method," Sustainability, MDPI, vol. 15(3), pages 1-17, February.
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    8. Hai Wu & Qian Jia & Weijun Wang & Nong Zhang & Yiming Zhao, 2021. "Experimental Test on Nonuniform Deformation in the Tilted Strata of a Deep Coal Mine," Sustainability, MDPI, vol. 13(23), pages 1-14, November.
    9. Xiaojie Yang & Eryu Wang & Xingen Ma & Guofeng Zhang & Ruifeng Huang & Haopeng Lou, 2019. "A Case Study on Optimization and Control Techniques for Entry Stability in Non-Pillar Longwall Mining," Energies, MDPI, vol. 12(3), pages 1-17, January.

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