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本文用光弹性实验方法,模拟分析了富蕴地震前后震区应力场特征。实验表明,在富蕴8级大震前,可可托海一二台断裂中部阿克赛依是最大剪应力集中区。 打孔释放应力后,最大剪应力集中区向地震断裂南段和本区东部迁移。 地震前后应力集中区与该区中强震的空间分布基本吻合。
In this paper, the photoelastic experiment method is used to simulate and analyze the characteristics of the stress field before and after the Fuyun earthquake. Experiments show that prior to the Fuyun M8 earthquake, the largest shear stress concentration area in the middle of the Cretaceous-Venezuela Sea-Ataka fault occurred. After drilling to release the stress, the maximum shear stress concentration zone migrates to the south of the earthquake fault and the eastern part of this area. The spatial distribution of the stress concentration area before and after the earthquake agrees well with the moderate strong earthquake in this area.