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通过数值模拟软件RFPA~(2D)对炭质泥岩单轴加载的力学行为进行研究。在单轴加载条件下分别模拟了岩石破坏过程、岩石凯瑟效应、不同尺寸对岩石破坏的影响。研究表明:单轴加载条件下,岩石的破坏过程与声发射情况相对应;用数值模拟验证了岩石的Kaiser效应;针对岩石不同尺寸的影响,采用高径比为2的标准试样进行模拟,发现150 mm×300 mm是岩石强度的分界点。
The mechanical behavior of carbonaceous mudstone under uniaxial loading was studied by numerical simulation software RFPA ~ (2D). Under uniaxial loading conditions, the effects of rock failure process, rock Cather effect and different sizes on rock failure were simulated. The results show that under uniaxial loading, the failure process of rock corresponds to the situation of acoustic emission. The Kaiser effect of rock is verified by numerical simulation. According to the influence of different rock sizes, a standard specimen with height-diameter ratio of 2 is used for simulation. It is found that 150 mm × 300 mm is the demarcation point of rock strength.