Inversion of stress field evolution consisting of static and dynamic stresses by microseismic velocity tomography
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- 作者：Cai-Ping Lua ; b ; cplucumt@126.com" class="auth_mail" title="E-mail the corresponding author ; Guang-Jian Liua ; Nong Zhanga ; Tong-Bin Zhaoc ; Yang Liua
- 关键词：P-wave ; Passive tomography ; Velocity distribution ; Stress concentration factor ; Velocity gradient
- 刊名：International Journal of Rock Mechanics and Mining Sciences
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：87
- 期：Complete
- 页码：8-22
- 全文大小：7236 K
文摘
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In micro-fissures region, P-wave characterizes with low velocity and high gradient.
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Large-scale and high velocity gradient as a precursor of macroscopic caving of roof.
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Prior to rockburst, high velocity gradient region gradually evolves into a very small area.
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Source of rockburst locates in the peak zone of velocity gradient, rather than velocity.
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The larger P-wave velocity gradient is, the higher the rockburst dangerous level is.