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Non-linear effects of pore pressure increase on seismic event generation in a multi-degree-of-freedom rate-and-state model of tectonic fault sliding

机译:构造断层滑动的多自由度速率与状态模型中孔隙压力增加对地震事件产生的非线性影响

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The influence of fluid injection on tectonic fault sliding and seismic event generations was studied by a multi-degree-of-freedom rate-and-state friction model with a two-parametric friction law. A system of blocks (up to 25 blocks) elastically connected to each other and connected by elastic springs to a constant-velocity moving driver was considered. Variation of the pore pressure due to fluid injection led to variation of effective stress between the first block and the substrate. Initially the block system was in a steady-sliding state; then, its state was changed by the pore pressure increase. The influence of the model parameters (number of blocks, spring stiffness, velocity weakening parameter) on the seismicity variations was considered. Various slip patterns were obtained and analysed.
机译:通过具有两参数摩擦定律的多自由度速率和状态摩擦模型,研究了流体注入对构造断层滑动和地震事件产生的影响。考虑了一个块体系统(最多25个块体),它们相互弹性连接并通过弹性弹簧连接到恒速移动驱动器。由于流体注入而引起的孔隙压力的变化导致第一块和基底之间的有效应力的变化。最初,块系统处于稳定滑动状态;然后,其状态随着孔隙压力的增加而改变。考虑了模型参数(块数,弹簧刚度,速度减弱参数)对地震活动性变化的影响。获得并分析了各种滑模。

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