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1. 西安科技大学地质与环境学院
2. 中国石油集团测井有限公司
3. 长安大学地质工程与测绘学院
Published:2025
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臧鑫, 边会媛, 张永浩, et al. 基于CT-PFC的泥页岩细观破坏演化研究[J]. Bulletin of Geological Science and Technology, 2025, 44(6): 178-188.
臧鑫, 边会媛, 张永浩, et al. 基于CT-PFC的泥页岩细观破坏演化研究[J]. Bulletin of Geological Science and Technology, 2025, 44(6): 178-188. DOI: 10.19509/j.cnki.dzkq.tb20230724.
为探究细观尺度下岩石破坏机理,结合数字图像处理(DIP)技术和颗粒流代码(PFC)方法提出了一种带有表征矿物属性新的建模方法,利用常规三轴压缩实验条件下获取的宏观力学参数和破坏形态对建立的离散元数值模型进行了校正,分析了地应力条件下岩石矿物属性对岩石破坏演化的影响,探究了非均质性结构对微裂行为的影响。结果表明:常规三轴压缩实验加载过程主要分为裂纹闭合期、弹性变形期、裂纹生长期、裂纹爆发期;由选取的3块泥页岩样品计算机断层扫描(CT)切片模拟结果表明,岩石的非均质性对岩石微裂纹的产生和岩石物理力学参数均有一定的影响,非均质性越弱,峰值强度(σ
max
)和弹性模量(E)越高;从岩石裂纹扩展分布来看,非均质性的增强使得微裂纹分布更加复杂;从岩石微裂纹.空间分布来看,微裂纹更加倾向于产生在白云石类矿物和石英类矿物的边界之间。研究成果对油气地下深部开采、防灾工程具有重要的参考意义。
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