The conventional (σ₁ > σ₂ = σ₃) multi-step creep test and true triaxial (σ₁ > σ₂ > σ₃) multi-step creep test of Jinping marble with rectangular shape were conducted. In this way, the effects of σ₁, σ₂, σ₃ and time on creep behaviour were compared and analysed. Unlike conventional creep tests, Jinping marble showed differential creep deformation and failure characteristics in σ₂ and σ₃-directions under true triaxial stress. The crack time-dependent evolution was-directional, and the crack tip growth was nearly parallel to the σ₁-direction with high stress and opened along the σ₂ and σ₃-directions with low stress. Moreover, when σ₂ > σ₃, the crack growth in the σ₂-direction was inhibited, and the crack evolution mainly occurred along the σ₃-direction. This difference eventually led to the macroscopic failure plane of Jinping marble generally acting parallel to the σ₂-direction and along the σ₃-direction. The larger the value of σ₂, the steeper the macroscopic failure surface, and the failure mode of the rock samples changed from shear to near-splitting failure: however, increasing σ₂ can only cause closure of initial cracks opening along the σ₂-direction, but did not change the number of initial cracks opening along the σ₃-direction. The experimental data also showed that the differential creep deformation in the σ₂ and σ₃-directions caused by true triaxial stress did not change with time and σ₁, but was only affected by σ₂ and σ₃. The differential creep deformation in σ₂ and σ₃-directions can be described by the formula DI = a(1-exp(b((σ₂-σ₃)/σ₃))).

常规的（σ ₁  >σ ₂  =σ ₃）多步蠕变试验和真三轴（σ ₁  >σ ₂  >σ ₃）金平大理石具有矩形形状的多步蠕变试验。以这种方式，σ的影响₁，σ ₂，σ ₃和时间对蠕变性能进行了比较分析。不同于传统的蠕变试验，金平大理石显示出差的蠕变变形和破坏特性σ ₂和σ ₃真三轴应力下-方向。裂纹时间依赖性演变是定向的，并且在裂纹尖端生长几乎平行于σ ₁-方向具有高应力，并沿打开σ ₂和σ ₃ -方向具有低的应力。此外，当σ ₂  >σ ₃，在σ裂纹扩展₂ -方向受到抑制，裂缝的演变主要沿着σ发生₃ -方向。这种差异最终导致金平大理石通常平行作用的宏观破坏面到σ ₂ -方向和沿着σ ₃ -方向。的σ值越大₂，更陡的宏观破坏面，和岩石样品的失效模式从剪切变到接近分割失败：然而，σ增加₂只能引起初始裂纹沿着σ开口的封闭₂ -方向，但没有改变初始裂纹沿着σ开口的数量₃ -方向。实验数据还表明，在σ差动蠕变变形₂和σ ₃ -方向引起的真三轴应力不随时间和σ改变₁，但仅受到σ ₂和σ ₃。差动蠕变变形中σ ₂和σ ₃ -方向可以通过公式DI =来描述 一个（1-EXP（b（（σ ₂ -σ ₃）/σ ₃）））。