摘要
板岩是一种非均质、连续–非连续介质,包含有微裂隙、微孔洞和微构造等,在力学、渗流、热传导等诸多方面均表现出明显的各向异性。选取锦屏水电站辅助洞泥质板岩试样,采用超薄金刚石锯片在标准岩样上预制一对三维裂纹,并应用岩土CT实验技术,开展水平和垂直层理方向加载条件下裂纹演化的细观尺度观测,分别得到了天然和预制双裂纹板岩破坏过程的细观表现特征,对比分析了水平和垂直层理方向加载条件下板岩裂纹起裂、扩展和破坏模式的不同,并对基于密度统计的岩石细观损伤变量定义方法的局限性进行了分析和讨论,为研究板岩的力学各向异性提供了新思路。
Slate is a heterogeneous and continuous-discontinuous material filled with micro-fractures, pores, fabrics, etc., and shows anisotropy in geological behavior, fluid flow and heat transfer. The slate samples from the auxiliary tunnel of Jinping hydro power station were cracked with an artificial diamond saw blade of ultrathin. The failure of samples under the uniaxial compression was observed with the 3D X-ray computed tomography system which is applicable to rock and soil. The difference between the sample failures with the loading direction perpendicular to and parallel to the bedding plane was obtained and the damage evolution of slate was also discussed on the meso-scale.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2016年第12期2525-2533,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2015CB057906)
国家自然科学基金资助项目(51274189
51479131)~~
关键词
岩石力学
泥质板岩
裂纹扩展
各向异性
CT实验
细观损伤演化
rock mechanics
argillaceous slate
crack propagation
anisotropy
3D X-ray computed tomographymeso-scale damage evolution
