利用水压破碎测定应力通常,岩体的主应力方向和钻孔轴成斜交。设岩体为不透水、均质、等量的弹性体,那么钻孔壁面上的最小切线应力σ_P和位置θ及方向γ_P,可由所设定座标的6个分应力求出(见图1)。即 Determination of stress using hydraulic crushing In general, the main stress direction of the rock mass is skewed with the drilling axis. Assuming that the rock mass is impervious, homogeneous, and equal in volume, the minimum tangential stress σ_P, position θ, and direction γ_P on the wall of the borehole can be determined from the 6 partial stresses of the set coordinates (see Figure 1). . which is