基于泥页岩应力应变、X射线衍射实验进行模型优化。实验结果表明,泥页岩抗压强度与围压、杨氏模量呈正相关;体积应变量与杨氏模量呈负相关,而与泊松比呈正相关;脆性矿物有利于提高岩石的刚性,而黏土矿物使得岩石具有较强的蠕变性能。页岩中不同脆度的矿物在不同程度上控制着岩石力学性质,通过数值模拟,综合岩石力学参数和矿物组成提出了一种新的脆性评价模型,同时解决了杨氏模量与泊松比的权重分配问题,拟合效果优于前2种方法。 Based on the stress and strain of shale and X-ray diffraction experiments, the model was optimized. The experimental results show that the compressive strength of shale is positively correlated with the confining pressure and Young’s modulus, the volume strain is negatively correlated with Young’s modulus, and positively correlated with Poisson’s ratio. The brittle minerals are helpful to improve the rigidity of rock, Clay minerals make the rock have strong creep properties. The different brittleness minerals in shale control rock mechanical properties to varying degrees. A new brittleness evaluation model is proposed by numerical simulation, comprehensive rock mechanics parameters and mineral composition, and the relationship between Young’s modulus and Poisson’s ratio The weight distribution problem, the fitting effect is better than the first two methods.