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Research on Overburden Failure Characteristics Based on the Theory of Plates and Shells

Author

Listed:
  • Hongyan Qin

    (School of Safety Engineering, North China Institute of Science and Technology, Beijing 101601, China)

  • Jingui Zhang

    (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China)

  • Zhiheng Cheng

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Zhenhua Ouyang

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Liang Chen

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Haiyang Yi

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Xidong Zhao

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Yang Li

    (School of Mining Safety, North China Institute of Science and Technology, Beijing 101601, China)

  • Hao Liu

    (College of Aerospace Engineering, Chongqing University, Chongqing 400044, China)

Abstract

To reveal the overburden failure characteristics during backfill mining, theoretical analysis based on the theory of plates and shells and field measurements were combined. Based on the theory of plates and shells, a mechanical model for the overburden failure mechanism during backfill mining was established, through which the fracture conditions of overburden during backfill mining were judged. By analyzing the fracture process and revealing the fracture mechanism, the fractured zone in overburden during backfill mining was found not to develop uniformly, but changed in a leaping manner. Field measurement was conducted taking the 1327 working face in Xima Coal Mine (Shenyang City, Liaoning Province, China) as an example to monitor and analyze the roof-to-floor convergence (RFC), strata behaviors at the working face, and overburden failure during backfill mining. Monitoring results show that the distance between the monitoring points and the working face was highly consistent with the periodic weighting interval when the RFC increased in a leaping manner; the RFC grew in a leaping manner after each roof weighting, as well as the fractured zone. By monitoring and analyzing overburden failure, it was determined that the maximum height of the fractured zone was 10.7 m and a leaping phenomenon was present in the development process of the fractured zone. The conclusions of theoretical analysis were completely consistent with those of the field measurements, thus confirming the leaping development of the fractured zone in overburden during backfill mining.

Suggested Citation

  • Hongyan Qin & Jingui Zhang & Zhiheng Cheng & Zhenhua Ouyang & Liang Chen & Haiyang Yi & Xidong Zhao & Yang Li & Hao Liu, 2022. "Research on Overburden Failure Characteristics Based on the Theory of Plates and Shells," Sustainability, MDPI, vol. 14(18), pages 1-16, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:18:p:11441-:d:913131
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    References listed on IDEAS

    as
    1. Erhu Bai & Wenbing Guo & Yi Tan & Mingjie Guo & Peng Wen & Zhiqiang Liu & Zhibao Ma & Weiqiang Yang, 2022. "Regional Division and Its Criteria of Mining Fractures Based on Overburden Critical Failure," Sustainability, MDPI, vol. 14(9), pages 1-15, April.
    2. Zou, Quanle & Zhang, Tiancheng & Ma, Tengfei & Tian, Shixiang & Jia, Xueqi & Jiang, Zebiao, 2022. "Effect of water-based SiO2 nanofluid on surface wettability of raw coal," Energy, Elsevier, vol. 254(PA).
    3. Xiuchang Shi & Jixing Zhang, 2021. "Characteristics of Overburden Failure and Fracture Evolution in Shallow Buried Working Face with Large Mining Height," Sustainability, MDPI, vol. 13(24), pages 1-19, December.
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