岩石物性变化对区域应力场的影响  

Effects of change of rock physical properties on the regional stress field

作　　者：李玉江[1] 陈连旺[1] 叶际阳[1] 詹自敏[1] 

机构地区：[1]中国地震局地壳应力研究所,北京100085

出　　处：《地球物理学进展》2010年第6期1941-1946,共6页Progress in Geophysics

基　　金：中国地震局地壳应力研究所基本科研业务专项(ZDJ2009-13;ZDJ2010-12);国家科技支撑项目(2008BAC38B04-02-02)联合资助

摘　　要：基于接触摩擦分析单元和弱化带两种断层处理模式,应用有限元数值模拟方法,分别探讨了弹性模量、泊松比、摩擦系数、内聚强度等物性参数的变化对区域应力场的影响.结果表明:在两种处理模式下,这些参数的变化对断层附近的应力场均有不同程度的影响,且在接触摩擦处理模式下影响相对较为复杂.Based on the two fault models, the frictional contact element and weakening zone, we employed the finite element method to study the features of regional stress fields caused by variations of physical properties like elastic modulus, Poisson ratio, frictional coefficient, cohesion and so on. The results indicated that these factors have different influences on stress fields near faults, and the effect was comparatively complicated in the frictional contact model.

关 键 词：接触摩擦分析单元 弱化带 物性参数 应力场 有限元方法 

分 类 号：P541[天文地球—构造地质学]