【摘要】 作者应用华北主要断裂模型和唐山、海城、平陆、临沂等地震断裂模型,进行了激光全息光弹、普通光弹以及软材料模拟的实验研究。 实验确定了华北断块区现代构造应力场的主压应力是北东东向水平挤压力。另外,还伴有地壳下部上地幔上隆的垂直向上的附加作用力。由于本地区构造的复杂性,由西至东主压应力的方向有所差异。 实验表明,华北地区各种类型发震构造的断裂闭锁区是强震发生的主要地点。 通过实验和定量分析,推测了华北地区的主要强震危险区的分布。更多还原

【Abstract】 Using major fault models of North China and the fault models of Tangshan,Haicheng,Pinglu and Linyi areas,the author made an experimental study on laser holographic photo-clastic and conventional photo-elastic tests.Simulation of the soft malerils was also carried out.Experiments disclose that principal stress of the modern tectonic stress field of North China fault block region to be NEE horizontal compression,and it is accompanied by additional vertically uplifting force from the lower crust and the upper mantle.Owing to the tectonic complexity of this region,the orientation of the principal compressional stress varies from west to east.The experiments also show that the locked segments of the seismo-genetic tectonic faults of various types in North China are likely the major localities of strong earthquake occurrences.Through experiments and quantitative analysis,distribution of hazardous areas of future strong earthquakes is further predicted.更多还原