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Energy Evolution Pattern and Roof Control Strategy in Non-Pillar Mining Method of Goaf-Side Entry Retaining by Roof Cutting—A Case Study

Author

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  • Lifeng Li

    (State Key Laboratory for 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
    School of Architecture and Civil Engineering, Guizhou University of Engineering Science, Guizhou, Bijie 551700, China
    All authors contributed equally to this work.)

  • Gan Li

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing 100083, China
    State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
    All authors contributed equally to this work.)

  • Weili Gong

    (State Key Laboratory for 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)

  • Jiong Wang

    (State Key Laboratory for 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)

  • Huilin Deng

    (School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China
    School of Architecture and Civil Engineering, Guizhou University of Engineering Science, Guizhou, Bijie 551700, China)

Abstract

This article focuses on the energy density alteration during non-pillar mining method of goaf-side entry retaining by roof cutting (GERRC) and adjacent working face mining. We also studied the support control strategy of goaf-side roadway. Numerical calculation model is established, and the parameters of the model are verified by the measured advance abutment pressure and numerical solution. Based on the numerical model, the energy density during mining is studied. It is found that the whole energy evolution pattern of the goaf side entry during the two adjacent working face mining includes: the original rock energy, the advance energy of the current working face, the dynamic lateral abutment energy caused by strata movement, the lateral abutment energy of the adjacent working face. The support body failure and surrounding rock large deformation phenomenon often occur in goaf side roadway, which is influenced by multiple energy disturbances. Research shows that strong stress disturbance of surrounding rock generates in front of the working face 23 m and behind of working face 60 m in GERRC method. In the second goaf-side entry retaining, the range is in front of the working face 47 m. The evolution law of energy field puts forward the strategy of using the high constant resistance and large deformation (CRLD) anchor cable and procured preferable effect.

Suggested Citation

  • Lifeng Li & Gan Li & Weili Gong & Jiong Wang & Huilin Deng, 2019. "Energy Evolution Pattern and Roof Control Strategy in Non-Pillar Mining Method of Goaf-Side Entry Retaining by Roof Cutting—A Case Study," Sustainability, MDPI, vol. 11(24), pages 1-18, December.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:24:p:7029-:d:295736
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    References listed on IDEAS

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    1. Yajun Wang & Yubing Gao & Eryu Wang & Manchao He & Jun Yang, 2018. "Roof Deformation Characteristics and Preventive Techniques Using a Novel Non-Pillar Mining Method of Gob-Side Entry Retaining by Roof Cutting," Energies, MDPI, vol. 11(3), pages 1-17, March.
    2. Yubing Gao & Dongqiao Liu & Xingyu Zhang & Manchao He, 2017. "Analysis and Optimization of Entry Stability in Underground Longwall Mining," Sustainability, MDPI, vol. 9(11), pages 1-19, November.
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    Cited by:

    1. Changhao Shan & Shenggen Cao & Zeyu Zhang & Kewen Lin & Jialong Sun, 2023. "Numerical Investigation on the Yield Pillar Bearing Capacity under the Two-End-Type Cable Reinforcement," Energies, MDPI, vol. 16(18), pages 1-17, September.
    2. Zhibiao Guo & Haohao Wang & Zimin Ma & Pengfei Wang & Xiaohui Kuai & Xianzhe Zhang, 2021. "Research on the Transmission of Stresses by Roof Cutting near Gob Rocks," Energies, MDPI, vol. 14(5), pages 1-24, February.

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