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应用RFPA岩石失稳和破坏失稳程序对完整岩石试件以及含有单一裂隙和交叉裂隙的岩石试件在单轴压缩下的破坏过程进行数值模拟研究。结果揭示了完整岩石试件和含有不同裂隙岩石试件破裂过程的发展规律,即岩石试件破坏一般都分为3个阶段:压密阶段、微裂纹萌生阶段和扩展以及断裂破坏阶段。不同的是随着加载的进行,完整岩石试件的破坏过程首先出现一个应力集中区,随后在中间、径向、侧向均出现裂纹,并且这些裂纹迅速扩展衍生许多新的次生裂纹,最终贯穿整个岩石试件。而含有裂隙的岩石试件的破坏过程是首先在裂隙的2端出现应力集中区,随后在裂隙的尖端产生裂纹并沿垂直裂隙方向发展并贯通整个岩石试件。
The failure process of intact rock specimens and rock specimens with single cracks and intersecting fractures under uniaxial compression was numerically simulated using RFPA rock instability and failure instability program. The results revealed that the rupture process of intact rock specimens and rock specimens with different fractures is usually divided into three stages: compacting stage, initiation and propagation of micro-cracks and fracture failure stage. The difference is that with the loading, the failure process of the intact rock specimen first appears a stress concentration zone, followed by cracks in the middle, radial and lateral directions, and the rapid expansion of these cracks derived many new secondary cracks, eventually Throughout the rock specimen. However, the failure process of rock specimen with cracks is that stress concentration area appears at the two ends of the crack first, and cracks are generated at the tip of the crack and develop along the direction of vertical crack and penetrate the whole rock specimen.