three-dimensional in-situ stress 基本例句 三维地应力 The theoretical model created based on minimum principal stress criteion is a new thinking of the three dimensional geo-stress measurements made by hydraulic fracturing method.采用最小主应力破坏准则，建立理论模型，是利用水压致裂方法进行三维地应力测量的新的研究思路和方法。