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地震是地壳介质受力作用而快速破裂的一种地壳运动形式,当地应力作用于特定结构的地壳介质时才能引起应力的局部集中,促成地震的孕育和发生。苏联格佐夫斯基(1973)等人认为,构造应力场是随时间变化的。固体潮、地震及地壳的现代缓慢运动都是这种变化的间接显示标志。岩体力学应力变化的记录可以提供关于引起现代地壳运动的这些力的直接信息。因此,探索地壳中的应力状态,对于地震科学的研究具有重要意义。近几年来,在地震测报工作中,对于震前出现的可能与地震有关的地应力现象的研究有了较大的发展,并积累了大量的观测资料。从地震预报的观点出发,对于这些资料,首先要
Earthquake is a form of crustal movement that is crushed rapidly by the force of crustal medium. Local stress can cause local concentration of stress when acting on crustal medium with specific structure, which can lead to the occurrence and occurrence of earthquakes. Soviet Gzowski (1973) and others believe that the tectonic stress field is changing over time. Solid tides, earthquakes and the modern slow motion of the crust are all indirect indications of this change. A record of changes in the mechanical stress of rock mass can provide direct information about these forces that cause modern crustal movement. Therefore, exploring the stress state in the crust is of great significance to the research of earthquake science. In recent years, there has been a great development of research on the phenomenon of earth stress related to earthquakes which occurred before the earthquake, and a great deal of observation data have been accumulated. From the point of view of earthquake prediction, the first thing to do with these data