摘要
本文论述了断层活动引起地震的机制和影响断层活动的因素,利用建立在一能模拟断层岩石的粘弹塑性力学性质的模型的基础上的数值分析方法,着重研究了区域应力场、断层岩石的力学性质及其规模对断层活动的影响。结果表明,区域应力场的主压应力方向对断层的活动影响最为显著。
The mechanism of fault activation which causes an earthquake and the factors which have effect on the activatin of faults are discussed. Using the method of numerical analysis based on a model which well simulates the visco-eltastoplastic properties of faulted rocks, the influence of regional stress field, mechanical properties of faults and their scale on the activation of faults is emphatically, studied. The results manifests that the direction of the principal compressive stress of regional stress field has a marked effect on the activation of faults.
关键词
岩石
断层
摩擦应力
计算
影响因素
numerical analysis
friction stress
strain energy faulted rock
shallow focus earthquake
