片岩的力学各向异性特征及其片状矿物定向度效应  

Mechanical Anisotropy of Schist and Orientation Effect of Flaky Minerals

作　　者：鬲新 薛梅 方子樊 吴波 Ge Xin;Xue Mei;Fang Zifan;Wu Bo(The Eighth Geological Brigade of Hubei Provincial Geological Bureau,Xiangyang,Hubei 441000)

机构地区：[1]湖北省地质局第八地质大队,湖北襄阳441000

出　　处：《江西建材》2024年第10期283-284,292,共3页

摘　　要：文中采用室内力学试验和基于颗粒流离散元技术的数值试验研究了单轴加载条件下片岩的力学各向异性特征及其片状矿物定向度效应。结果表明,单轴加载的片岩试样发生了脆性破坏,θ=0°、45°和90°试样分别发生沿片理面的劈裂破坏、沿片理面的滑移破坏和跨片理面的拉伸破坏;随着片状矿物定向度降低,片岩破坏模式对片理方向的依赖性趋于减弱,强度曲线从U形变为肩形和波浪形。The mechanical anisotropy of schist under the condition of uniaxial loading and the orientation effect of flaky minerals were studied using indoor mechanical tests and numerical tests based on particle flow dispersion element technology.The results showed that the uniaxial loaded schist specimen underwent brittle failure,with specimens atθ=0°,45°,and 90°experiencing splitting failure along the schistosity plane,sliding failure along the schistosity plane,and tensile failure across the schistosity plane,respectively.As the orientation degree of flaky minerals decreases,the dependence of failure mode of schist on schistosity orientation tends to weaken,and the strength curve changes from U-shape to shoulder-and wave-shape.

关 键 词：片岩 各向异性 片状矿物 

分 类 号：TU45[建筑科学—岩土工程]