完整及含裂隙岩石试件单轴压缩过程数值模拟  

Uniaxial compression process numerical simulation of complete and fractured rock specimens

作　　者：高洋 张保良 崔诗才[1] 孟昭博[1] 马风宾 Gao Yang;Zhang Baoliang;Cui Shicai;Meng Zhaobo;Ma Fengbin(School of Architectural Engineering,Liaocheng University,Liaocheng 252000,China;National Key Laboratory Cultivation Base for Mine Disaster Prevention and Control Jointly Built by Provincial and Ministry Departments,Qingdao 266590,China;Binzhou Transportation Development Group Co.,Ltd.,Binzhou 256600,China)

机构地区：[1]聊城大学建筑工程学院,山东聊城252000 [2]矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [3]滨州交通发展集团有限公司,山东滨州256600

出　　处：《能源与环保》2020年第1期99-102,共4页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：聊城大学博士科研启动基金(318051701);山东省自然科学基金(ZR2018LE008)

摘　　要：采用FLAC 3D数值模拟程序对完整岩石试件及含有单一裂隙岩石试件在单轴压缩下的破坏过程进行数值模拟。结果揭示了完整岩石试件和含裂隙岩石试件破裂过程的发展规律,即岩石试件破坏一般分为3个阶段:压密阶段、微裂纹萌生阶段和扩展以及断裂破坏阶段。不同的是随着加载的进行,完整岩石试件的破坏过程首先出现一个应力集中区,最终形成一个倾斜的应力面,导致试件最后形成一个倾斜的破坏面;而含有裂隙的岩石试件的破坏过程是首先在裂隙的两端出现应力集中区,随后在裂隙的尖端产生裂纹并沿垂直裂隙方向发展贯通整个岩石试件。The failure process of complete rock specimen and rock specimen with single fracture under uniaxial compression were simulated by FLAC 3D numerical simulation program.The results revealed development law of fracture process of complete rock specimen and fissure rock specimen,that was,the failure of rock specimen was generally divided into three stages:compaction stage,microcrack initiation stage and propagation stage,and fracture failure stage.The difference was that with loading process,a stress concentration zone first appeared in failure process of complete rock specimens,and finally an inclined stress surface was formed,leading to formation of an inclined failure surface of specimens.However,the failure process of rock specimens containing cracks was that stress concentration zones appeared at both ends of cracks,and then cracks were formed at crack tips and developed along vertical crack direction and connected the whole rock specimen.

关 键 词：单轴压缩 裂纹扩展 强度极限 数值模拟 

分 类 号：TU452[建筑科学—岩土工程]