强震孕育与发生的实验研究

应用激光全息光弹性实验研究将我国７个强震的孕育构造划分为枢纽型、交汇型和阶区型３类，并定量分析了它们在现代构造应力场作用下的形变场及主应力、剪应力的分布特征。研究结果提出了这３种孕震构造的动力学过程、地震重复发生的力学机制以及影响地震震级的构造因素

EXPEKIMENTAL STUDY ON THE PREPARATION AND OCCURRENCE OF STRONG EARTHQUAKE

In this paper，the tectonic features for preparation of strong earthquakes in China are distin-guished into three types：pivotal，intersection and step area types after our laser holographic pho－to elasticity experiments．The characteristics of distribution of strain field and principal stress，shear stress under the effect of recent tectonic stress field are quantitatively analysed．The studyresult suggests a dynamic process for preparation of earthquake，mechanism of earthquake rec-currence and tectonic factors affecting earthquake magnitute for these three types of tectonic fea-tures