地壳上各种构造现象是由于地应力作用的结果,开展地应力场的研究对地震预报、工程建设、矿山开采等具有重要的意义。研究地应力场概括起来有两个途轻:一是由地质的或地震的现象反演地应力场的作用;二是采取直接的或间接的方法进行地应力测量。地应力实地测量可以直接给出地壳中现今应力的大小和方 Various tectonic phenomena on the crust are the result of the effect of geostress. It is of great significance to study the geostress field in earthquake prediction, engineering construction and mining. There are two ways to study the geostress field: first, the geostress or the seismic inversion of the geostress field; second, the direct or indirect method is used to measure the geostress. In-situ measurements of stress can give a direct indication of the present magnitude and magnitude of stress in the crust