The ratio between major and minor principal stresses basically keeps stable, while it varies between filling and impoundment periods. 大主應力與小主應力之比基本保持恆定，但填築期及蓄水期的比值大小不同。
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. 採用最小主應力破壞準則，建立理論模型，是利用水壓致裂方法進行三維地應力測量的新的研究思路和方法。
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. 採用最小主應力破壞準則，建立理論模型，是利用水壓致裂方法進行三維地應力測量的新的研究思路和方法。
The ratio between major and minor principal stresses basically keeps stable, while it varies between filling and impoundment periods. 大主應力與小主應力之比基本保持恆定，但填築期及蓄水期的比值大小不同。
