Rock Burst Intensity Classification Based on the Radiated Energy with Damage Intensity at Jinping II Hydropower Station, China

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• 作者：Bing-Rui Chen (1)
  Xia-Ting Feng (1)
  Qing-Peng Li (1)
  Ru-Zhou Luo (2)
  Shaojun Li (1)
  
  1. State Key Laboratory of Geomechanics and Geotechnical Engineering ; Institute of Rock and Soil Mechanics ; Chinese Academy of Sciences ; 2# Xiaohongshan ; Bayi Road ; Wuhan ; Hubei ; 430071 ; China
  2. China Railway 13th Bureau Group CO. ; LTD ; Tianjin ; 300308 ; China
  
• 关键词：Rock burst intensity classification ; Microseismic monitoring ; Radiated energy ; Hierarchical clustering ; Jinping
• 刊名：Rock Mechanics and Rock Engineering
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：48
• 期：1
• 页码：289-303
• 全文大小：3,063 KB
• 参考文献：1. Board MP (1994) Numerical examination of mining-induced seismicity. PhD thesis, University of Minnesota
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Civil Engineering
  
• 出版者：Springer Wien
• ISSN：1434-453X

文摘

Based on the radiated energy of 133 rock bursts monitored by a microseismic technique at the Jinping II hydropower station, in Sichuan province, China, we analyzed the advantages and disadvantages of qualitative classification methods for the rock burst intensity. Then, we investigated the characteristics, magnitude, and laws of the radiated energy, as well as the relationship between the rock burst radiated energy and intensity. Then, we selected the energy as an evaluation index for the rock burst intensity classification, and proposed a new rock burst intensity quantitative classification method, which utilized the hierarchical clustering analysis technique with the complete-linkage method. Next, we created a new set of criteria for the quantitative classification of the rock burst intensity based on radiated energy and surrounding rock damage severity. The new criteria classified the rock burst intensity into five levels: extremely intense, intense, moderate, weak, and none, and the common logarithms of the radiated energy of each level were >7 lg(E/J), >4 lg(E/J) and E/J), >2 lg(E/J) and E/J), >1 lg(E/J) and E/J), and E/J), respectively. Finally, we investigated the factors influencing the classification, and verified its feasibility and applicability via several practical rock burst examples.