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Volume 41 Issue 2
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JIANG Fu-xing, LIU Ye, LIU Jun, ZHANG Ming, DU Jian-peng, SUN Wei-shun, ZHANG Wen-peng. Pressure-releasing mechanism of local protective layer in coal seam with rock burst[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(2): 368-375. DOI: 10.11779/CJGE201902016
Citation: JIANG Fu-xing, LIU Ye, LIU Jun, ZHANG Ming, DU Jian-peng, SUN Wei-shun, ZHANG Wen-peng. Pressure-releasing mechanism of local protective layer in coal seam with rock burst[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(2): 368-375. DOI: 10.11779/CJGE201902016
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Pressure-releasing mechanism of local protective layer in coal seam with rock burst

  • 1. School of Civil and Recourses Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2. Henan Dayou Energy Co., Ltd., Yima 472300, China;
    3. Anshan Industry Research Institute, Anshan 114000, China;
    4. Sihe Coal Mine of Jincheng Coal Mining Group Co., Ltd., Jincheng 048205, China

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  • Received Date: December 27, 2017
  • Published Date: February 24, 2019
    Graphical Abstract
    • Abstract
  • The exploitation of protective layer is a regional effective method for prevention of rock burst. However, when the exploitation of protective layer has little economic value and the safety of main coal seam cannot be guaranteed without it, a new method called local protective layer is proposed, and the mechanism of prevention of rock burst and large deformation is studied. In order to prove the security of the proposed method, a formula for calculating the stress of rock mass under the action of local protective layer is derived by establishing the mechanical relationship model for the local protective layer and the protected layer. The distribution of the main stress and shear stress under different widths of local protection layer is plotted. The stress criterion for the occurrence of shock and large deformation boundary is given. Based on the actual situation of a coal mine in Henan, the calculation method for the effects of the local protection layer is given. The calculated results are applied in the design of a dangerous rock burst face in the coal mine.
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    • References (14)
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