摘要
采用有限元数值模拟的方法,对不同裂隙分布的岩石试样进行单轴加载压缩的数值模拟试验,通过引入压剪指数和拉伸指数对岩样的破坏进行判断,分析不同裂隙条件下岩样的破坏特征及其倾向程度,探索裂隙岩样的破坏机理和影响规律。研究结果表明单轴压缩条件下,标准的裂隙岩样破坏主要受拉应力控制,且破裂面出现的概率具有单斜破坏面>竖向破坏面>锥形破坏面的特征,其结论与实验室的大量试验结果吻合,并从机理上解释了微裂隙岩石单轴压缩破坏过程。
By adopting numerical simulation with finite elements,numerical simulation test of uniaxial compression was carried out to study the different fissuring distribution of rock samples.Though introducing compression-shear index and stretch index to estimate the failure of rock samples,failure characteristics and tendency of rock samples with different fissuring conditions were analyzed,and failure mechanism and influencing rule of the rock samples with fissuring were discussed.The results showed that under the condition of uniaxial compression,the failure of normal rock sample with fissuring was mainly controlled by tensile stress,and the appearance probability of monoclinic failure plane was greater than that of vertical failure plane,and which was greater than that of subulate failure plane,and the results were agree with lots of tests,it explained the failure process of rock with fissuring under the uniaxial compression in mechanism.
出处
《中国煤炭》
北大核心
2016年第8期43-46,共4页
China Coal
基金
山西省联合基金项目(2012012012)
关键词
岩样破坏
岩样微裂隙
裂隙形态
单轴压缩
破坏指数
数值计算
failure of roak sample
micro-fissuring of rock sample
fissuring form
uniaxial compression
failure index
numerical calculation
