地壳内的应力状态,可从几个方面来推断:至今,最可靠和最广泛的资料,仍来自地震震源机制解,但它仅仅给出主应力的方向。其它资料则主要来源于原地绝对应力测量,它提供了作用于地壳最上部的应力大小的附加信息。到目前为止,大部分原地应力测量为工程所需的岩石力学所推动,它能给出影响结构稳定 The state of stress in the earth’s crust can be inferred from several aspects: To date, the most reliable and extensive data still come from the focal mechanism solution of the earthquake, but it only gives the direction of the principal stress. Other sources are mainly derived from in-situ absolute stress measurements, which provide additional information on the magnitude of stress acting on the uppermost part of the earth’s crust. To date, most of the in-situ stress measurements have been driven by the rock mechanics required for the project, giving it the potential to affect structural stability