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通过数值模拟 ,研究渗流场和应力场相互作用 ,了解在震源区地下水对应力场和应变场的影响。结果表明 ,岩石的抗剪强度及摩擦阻力随孔隙压力的增加而降低 ,孔隙压力使应变分布发生变化 ,断层及其附近剪切应力升高。地下水的这些效应可能与地震震源过程有关
Through numerical simulation, the interaction between seepage field and stress field is studied to understand the influence of groundwater on the stress field and strain field in the source area. The results show that the shear strength and frictional resistance of rock decrease with the increase of pore pressure. The pore pressure changes the strain distribution and the shear stress in the vicinity of the fault and its vicinity increases. These effects of groundwater may be related to the earthquake source process