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地震的孕育和发生与地壳应力场的变化存在着本质的联系,通过测量地应力来研究地震与地应力的关系,其意义是明显的。从六十年代开始,在李四光教授的倡导下,我国开展了地应力绝对测量和直接用于地震监测预报的地应力相对测量的研究。早期用于测量地应力的主要方法是压磁法,近年来又发展了多种新的应力、应变测量方法。关于压磁法地应力相对测量结果与地震关系的研究,已有人进行了初步的工作(如文献[1—5]),但关于一次地震前测区应力状态的比较完整的变化过程,目前国内外却未见报道。
There is an essential relationship between the occurrence and occurrence of earthquakes and the change of crustal stress field. The significance of studying the relationship between earthquakes and stress by measuring geostress is obvious. Since the 1960s, with the advent of Professor Li Siguang, China has carried out a study on the absolute measurement of earth stress and the relative measurement of earth stress, which is directly used for earthquake monitoring and forecasting. The main method used to measure geostress in the early stage is the piezomagnetic method. In recent years, a variety of new stress and strain measurement methods have been developed. Preliminary work has been done on the relationship between the relative stress measurement results of piezomagnetic method and earthquakes (eg, [1-5]). However, a relatively complete process of the stress state before a seismic survey is currently underway in China It has not been reported outside.