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

被引:2
|
作者
Bing-Rui Chen
Xia-Ting Feng
Qing-Peng Li
Ru-Zhou Luo
Shaojun Li
机构
[1] Chinese Academy of Sciences,State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics
[2] China Railway 13th Bureau Group CO.,undefined
[3] LTD,undefined
来源
Rock Mechanics and Rock Engineering | 2015年 / 48卷
关键词
Rock burst intensity classification; Microseismic monitoring; Radiated energy; Hierarchical clustering; Jinping;
D O I
暂无
中图分类号
学科分类号
摘要
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 <7 lg(E/J), >2 lg(E/J) and <4 lg(E/J), >1 lg(E/J) and <2 lg(E/J), and <1 lg(E/J), respectively. Finally, we investigated the factors influencing the classification, and verified its feasibility and applicability via several practical rock burst examples.
引用
收藏
页码:289 / 303
页数:14
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