层状岩体单轴压缩破坏数值研究  

Numerical study of layered rock mass under uniaxial compression failure

作　　者：罗世林[1,2] 万文[1,2] 赵延林[1,2] 唐劲周 刘天宇[1,2] 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2016年第2期50-56,共7页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51274097;51174088);湖南省自然科学基金资助项目(2015JJ2067);湖南省教育厅资助项目(13A020)

摘　　要：为综合研究加载速率和结构面倾角2个因素对岩石单轴抗压强度的影响关系,开展了一系列数值试验,试验表明:岩石单轴抗压强度随加载速率的增加而近似线性增加;随着结构面倾角的增加岩石单轴抗压强度出现先减少后增加的"U"型曲线特点;通过变形破坏分析可知60°为岩石最不利结构面倾角;同时结构面倾角为0°和90°时应力-位移曲线具有明显的尖点说明其脆性较其他倾角下的岩石明显.在此基础上定量的提出了岩石抗压强度与加载速率和结构面倾角的关系式.To study the relationship between the loading ratios and the two factors of structure plane dip influencing on rock mass uniaxial compression strength, this paper has made a series of numerical experiments. Experiment shows that the rock uniaxial compressive strength increases linearly with the increase of the loading rate; with the increase of structural plane dip, the rock uniaxial compressive strength reduces at first and then increases whose characteristics suits to the ＂ U＂ type curve. Through the analysis of the deformation, it knows that 60° is the most unfavorable structure plane dip for rock; at the same time, there are cusp on the stress strain curve of 0° and 90° obviously, showing that its brittleness is clear, compared to other rocks. Based on the results of numerical experiments, this paper puts forward the quantitative relation of the loading rates and the structure plane dip to rock uniaxial compressive strength.

关 键 词：数值试验 加载速率 抗压强度 结构面倾角 

分 类 号：TU45[建筑科学—岩土工程]