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利用 RFPA2 D软件研究了试样孔洞周边裂纹的形成和演化 ,验证了三种类型裂纹的存在。研究了不同围压条件下不同裂纹间的相互作用机制。验证了局部应力集中是裂纹形成和扩展的重要因素 ,同时也指出 ,岩石类材料非均匀性是形成拉、压应力集中区及裂纹扩展路径不规则和随机性的主要原因
The formation and evolution of cracks around the sample hole were studied by RFPA2 D software and the existence of three types of cracks was verified. The interaction mechanism of different cracks under different confining pressures was studied. It is also verified that the local stress concentration is an important factor for the formation and propagation of cracks. It is also pointed out that the heterogeneity of rock materials is the main reason for forming irregularities and randomness of tensile and compressive stress concentration zones and crack propagation paths