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Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam

Author

Listed:
  • Yuqi Shang

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

  • Dezhong Kong

    (College of Mining, Guizhou University, Guiyang 550025, China
    State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China)

  • Shijiang Pu

    (Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China)

  • Yu Xiong

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

  • Qiang Li

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

  • Zhanbo Cheng

    (School of Engineering, University of Warwick, Coventry CV4 7AL, UK)

Abstract

In this study, taking the Sheng’an coal mine as an engineering background, the failure characteristics of the surrounding rock of a roadway under repeated mining in a close-distance coal seam is comprehensively illustrated through field measurements (e.g., drilling imaging), theory analysis and numerical simulation (finite difference method (FDM)). The results show that although the return airway 10905 remains intact, the apparent failure of the roadway’s roof and the coal pillar can be observed. In addition, the expression of floor failure depth caused by upper coal seam mining is obtained through elastic-plastic theory. Meanwhile, the deformation of the surrounding rock of the roadway increases with the increase of repeated mining times, especially for the horizontal displacement of the roadway on the coal pillar side. Moreover, the cracks’ evolution of surrounding rock in the roadway can be observed as asymmetric characteristics. Finally, the stability control technology of “asymmetric anchor net cable + I-steel” is proposed to prevent potential mining disasters, and the feasibility of this support scheme is verified by numerical simulation and field practices. It can meet the requirement of safe mining and provide guidelines to effectively solve the failure of a roadway in close-distance coal seam mining.

Suggested Citation

  • Yuqi Shang & Dezhong Kong & Shijiang Pu & Yu Xiong & Qiang Li & Zhanbo Cheng, 2022. "Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam," Mathematics, MDPI, vol. 10(13), pages 1-18, June.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:13:p:2166-:d:844465
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    References listed on IDEAS

    as
    1. Yuliang Wang & Guiyi Wu & Yang Liu & Zhanbo Cheng, 2022. "Study on Overlying Strata Movement and Surface Subsidence of Coal Workfaces with Karst Aquifer Water," Mathematics, MDPI, vol. 10(2), pages 1-17, January.
    2. 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.
    3. Huayong Lv & Defeng Wang & Zhanbo Cheng & Yaning Zhang & Tao Zhou, 2022. "Study on Mechanical Characteristics and Failure Modes of Coal–Mudstone Combined Body with Prefabricated Crack," Mathematics, MDPI, vol. 10(2), pages 1-18, January.
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    Citations

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    Cited by:

    1. Li Li & Dezhong Kong & Qinzhi Liu & Yu Xiong & Fei Chen & Haibing Zhang & Yunyun Chu, 2022. "Comprehensive Identification of Surface Subsidence Evaluation Grades of Mines in Southwest China," Mathematics, MDPI, vol. 10(15), pages 1-16, July.
    2. Yuanmin Wang & Yunqiang Wang & Song Luo & Hao Liu & Guansheng Yi & Kang Peng, 2023. "Influence of the Crack Angle on the Deformation and Failure Characteristics of Sandstone under Stepped Cyclic Uniaxial Compression with a Constant Lower Limit," Mathematics, MDPI, vol. 11(9), pages 1-19, May.
    3. Lu He & Dezhong Kong & Zhen Lei, 2022. "Research on Vibration Propagation Law and Dynamic Effect of Bench Blasting," Mathematics, MDPI, vol. 10(16), pages 1-21, August.
    4. Fulian He & Bingquan Liu & Deqiu Wang & Dongdong Chen & Yanhao Wu & Liming Song & Xiang Ma & Qiucheng Ye & Zaisheng Jiang & Fangfang Guo & Weiguang Wang & Yiyi Wu, 2022. "Study on Stability and Control of Surrounding Rock in the Stopping Space with Fully Mechanized Top Coal Caving under Goaf," Energies, MDPI, vol. 15(22), pages 1-22, November.

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