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Evolution Characteristics of Overburden Strata Structure for Ultra-Thick Coal Seam Multi-Layer Mining in Xinjiang East Junggar Basin

Author

Listed:
  • Xufeng Wang

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China
    The Jiangsu Laboratory of mining-induced seismicity monitoring, China University of Mining & Technology, Xuzhou 221116, China)

  • Dongdong Qin

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China)

  • Dongsheng Zhang

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China)

  • Weiming Guan

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China)

  • Mengtang Xu

    (School of Mines, Guizhou Institute of Technology, Guiyang 550003, China)

  • Xuanlin Wang

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China)

  • Chengguo Zhang

    (School of Mining Engineering, University of New South Wales, Sydney, NSW 2052, Australia)

Abstract

The efficient and safe extraction of ultra-thick coal seam in the Xinjiang East Junggar Basin has been a major focus in the future of mining in China. This paper systematically studied the overburden strata fracturing process and the structure evolution characteristics based on a typical ultra-thick coal seam condition in Xinjiang, using both physical and numerical modeling studies. The interactions between shields and the roof strata were also examined, from the perspective of ground support. The results indicated that roof structure was mainly in the form of voussoir beam at the early mining stage, where overburden stability was affected by the rock mass properties and mining parameters. The support load mainly included top coal and immediate roof gravity load and the load caused by main roof rotary consolidation. As a result of mining disturbance and strata movement, the overlying strata re-fractured in the later mining stage. The roof structure changed from beam to arch gradually and propagates upwards with the increase of multi-layer mining times. The support load was mainly the gravity load of the friable rock mass within compression arch. The results will provide a guideline for the improvement of roof stability under similar mining conditions in Xinjiang.

Suggested Citation

  • Xufeng Wang & Dongdong Qin & Dongsheng Zhang & Weiming Guan & Mengtang Xu & Xuanlin Wang & Chengguo Zhang, 2019. "Evolution Characteristics of Overburden Strata Structure for Ultra-Thick Coal Seam Multi-Layer Mining in Xinjiang East Junggar Basin," Energies, MDPI, vol. 12(2), pages 1-14, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:2:p:332-:d:199570
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    Citations

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    Cited by:

    1. Dongdong Qin & Xufeng Wang & Dongsheng Zhang & Weiming Guan & Lei Zhang & Mengtang Xu, 2019. "Occurrence Characteristic and Mining Technology of Ultra-thick Coal Seam in Xinjiang, China," Sustainability, MDPI, vol. 11(22), pages 1-19, November.
    2. Laifu Zhao & Qian Du & Jianmin Gao & Shaohua Wu, 2019. "Contribution of Minerals in Different Occurrence Forms to PM 10 Emissions during the Combustion of Pulverized Zhundong Coal," Energies, MDPI, vol. 12(19), pages 1-14, September.
    3. Yihong Liu & Hongbao Zhao & Shaoqiang Liu & Wenhao Sun, 2022. "Asymmetric damage mechanism of floor roadway based on zonal damage characteristics of longwall panel floor: a case study," 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. 114(1), pages 1015-1041, October.
    4. Zhao, Pengxiang & Zhuo, Risheng & Li, Shugang & Lin, Haifei & Shu, Chi-Min & Shuang, Haiqing & Wei, Zongyong, 2023. "Greenhouse gas protection and control based upon the evolution of overburden fractures under coal mining: A review of methods, influencing factors, and techniques," Energy, Elsevier, vol. 284(C).

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