采矿与安全工程学报2017，Vol.34Issue(6)：1179-1185,7.DOI:10.13545/j.cnki.jmse.2017.06.022
不同围压下页岩残余强度及破裂面特征的试验研究
Experimental study on characteristics of post-peak residual strength and fracture surface of shale under various confining pressures
摘要
Abstract
In this paper, the effect of fracture surface inclination angle and scratches on the strength and deformation characteristics of broken shale are systematically elaborated by the uniaxial and con-ventional triaxial compression tests under different confining pressures. The results show that the shale mainly shows the decrease of cohesion from yield failure to stable residual stage. The ratio of residual strength to peak strength of rock increases with the increase in confining pressure, which may be related to the fact that the fracture inclination angle decreases with the increase in the confining pressure. Be-sides, the residual strength in low confining pressures is more sensitive to confining pressures than to peak strength. Moreover, the fracture surface scratch shows obvious fractal characteristics and the frac-tal dimension of the fracture surface scratch nonlinearly increases with the confining pressures increas-ing. The residual strength shows a good exponential relationship with the fractal dimension of fracture surface scratch.关键词
岩石压缩试验/破裂面倾角/残余强度/破裂面擦痕/分形维数Key words
rock compression test/fracture surface inclination angle/residual strength/fracture surface scratch/fractal dimension分类
矿业与冶金引用本文复制引用
梁运培,李清淼,顾义磊,邹全乐,李全贵..不同围压下页岩残余强度及破裂面特征的试验研究[J].采矿与安全工程学报,2017,34(6):1179-1185,7.基金项目
"十三五"国家重大科技专项项目(2016ZX05043005) （2016ZX05043005）
"十三五"国家重点研发计划项目(2016YFC0801404) （2016YFC0801404）
国家自然科学基金项目(51674050) （51674050）
