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在充分考虑地质体材料力学性质非均匀性特点的基础上,运用岩石破裂失稳过程有限元分析新方法(RFPA),以不存在明显孕震构造特征的包体模式为例,模拟研究了挤压边界条件下的震源孕育模式,包括断层的形成过程和地震活动特征,演示出孕震体由变形、破裂到宏观贯通的地震全过程以及它们的时空强基本规律.计算所得到的应力、变形和微震空间分布,形象地给出了变形局部化、震源迁移、膨胀或隆起,弹性回跳和X型共轭变形带等直观图象.
On the basis of fully considering the heterogeneity of the mechanical properties of the geologic body material, a new finite element analysis method (RFPA) for the process of rock failure and instability is presented. Taking the inclusion body model without obvious seismogenic structure as an example, The hypocenter gestation model under the pressure boundary conditions includes the formation of faults and the characteristics of seismic activity, and demonstrates the whole process of the earthquake from the deformation and rupture to macroconcrete and their basic law of space-time intensity. The calculated stress, deformation and microseismic spatial distribution are calculated and the visual images such as deformation localization, source migration, swelling or uplift, elastic bounce and X-shaped conjugate deformation zone are given.