地震活动性演化的物理与数值试验研究－图像动力学

As of today, it is very difficult for researchers and engineers to analytically and theoretically analyze and deal with seismicity due to its extreme complexity. Thus, it is an efficient way to investigate the mechanism of seismicity through numerical simulation besides experiments in laboratory. Based on the project, the Earthquake2D, an advanced numerical code, was copyrighted and self-developed at CRISR in Northeastern University to study the mechanisms of induced seismicity. There are three distinct features distinguishing Earthquake2D from other numerical methods:.1.It can simulate nonlinear deformation behavior of rock and the discontinuum mechanics problems of rock failure by incorporating heterogeneity of rock properties into the model; .2.It can simulate the initiation, propagation and coalescence of microcracks in rock under loading and replicate the dynamic evolution processes of stress fields, displacement fields and flow fields;.3.It can reproduce the temporal and spatial patterns of micro-seismicity (AE) during rock deformation and failure and contrast with the experimental findings in laboratory. .In short, forty-two journal papers including thirteen papers indexed by SCI were issued on the related journals at home and abroad. Great achievements and anticipative goals have been made by this research group under the support of this project..

建立一种具有力学基础的图象动力学模型。在考虑复杂地质环境影响的条件下，通过对地壳介质在变形破裂过程中的应力场和微震活动性演化过程的物理与数值模拟试验，研究地震活动性图象的复杂性。从应力场的活动图象出发研究微震活动图象，对于从力学的更高层次上理解地震活动中的自组织现象、非线性过程以及建立新的地震预报理论，都具有重要的科学意义。