岩盐的强度试验,可以预测破裂应力。对于水力压裂采卤,必须对岩盐的强度试验进行认真研究,寻找破裂规律,才能减少压裂施工的盲目性。所谓强度试验,是指在外力作用下,抵抗破坏的能力,有关强度的理论较多,如最大正应力、最大应变、最大剪应力等理论。经过大量试验研究证明,在三轴围压状态、最大剪切理论(莫尔理论)比较切合实际,能阐明剪切破坏的各种现象和预测剪切破裂应 Rock salt strength test, can predict rupture stress. For hydraulic fracturing mining brine, rock salt strength test must be carefully studied to find the rupture law, in order to reduce the blindness of fracturing. The so-called strength test, refers to the ability of external resistance to damage, the theory of strength, such as maximum normal stress, maximum strain, maximum shear stress theory. After a large number of experimental studies have shown that in the state of triaxial compression, the maximum shear theory (Moore’s theory) is more realistic and can illustrate the various phenomena of shear failure and predict shear fracture