关键词: 应力场, 数值模拟, 雁列构造, 断层几何

Abstract: The stress fields of en echelon faults with different geometry and mechanical conditions were considered by dynamically numerical simulation. The effect of geometry on stress field pattern is discussed. The disturbed stress fields caused by fault propagation were calculated and their effects on the neighboring fault were investigated. Around the propagating fault segment the disturbed stress field of maximum shear stress displays an eight petal pattern and that of mean stress displays a four quadrant pattern. Interest is that when there are several propagating segments in a narrow area,the disturbed stress fields remain the same patterns.

Key words: Stress field, Numerical simulation, En echelon structure, Fault geometry