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本文应用变形模拟、普通光弹和激光全息光弹性模拟方法,采用多种力源对南北地震带北段现代构造应力场分布特征进行了探讨。研究了该区各地段应力场的主压应力、主张应力展布方向,同时还绘制了主压应力、主张应力和最大剪应力等值线图,从而了解了该区各段在统一应力场作用下应力值的相对大小。文中还结合莫尔强度理论,分析了该区地震活动性,对该区现代构造应力场分布特征与震中迁移的关系进行了探讨。
In this paper, deformation modeling, ordinary photoelastic and laser holographic photoelastic simulation methods are used to investigate the distribution of the stress field in the northern section of the North-South Seismic Belt using multiple force sources. The principal compressive stress of stress field in different sections of the area is studied and the direction of stress distribution is advocated. At the same time, contour maps of principal compressive stress, principal stress and maximum shear stress are plotted, The relative magnitude of the lower stress value. Based on the theory of Mohr intensity, the paper analyzes the seismicity of this area and discusses the relationship between the distribution of stress field and the migration of the epicenter in this area.