摘要
基于以D-P准则为屈服函数建立的弹塑性本构模型,利用有限元数值模拟软件COMSOL Multiphysics对巷道围岩的稳定性进行了数值模拟,分析了巷道围岩的应力、位移分布情况,对比了以Mohr-Coulomb准则和D-P准则为屈服函数时巷道围岩的塑性区分布,探讨了巷道围岩的失稳破坏形式。研究表明,以Mohr-Coulomb准则为屈服函数时可能会低估巷道围岩塑性区分布范围;巷道两帮首先发生拉伸破坏,随后发生剪切破坏,最终形成X状共轭剪切破坏。
Based on taking D - P criterion as the yield function to establish the elastic - plastic constitutive model, numerical simulation of roadway surrounding rock stability was carried on by using COMSOL Multiphysics numerical simulation software, stress and displace- ment distribution of roadway surrounding rock was analyzed, and rock plastic zone distribution with yielding function of the Mohr - Cou- lomb criterion and D - P criterion was contrasted, then the failure form of roadway was discussed. Research results show that taking Mohr - Coulomb criterion as the yield function may underestimate the roadway surrounding rock plastic zone distribution, tensile failure first occurs in the two - side roadway, then occurs shear failure, eventually forms a X shape conjugate shear failure.
出处
《煤矿安全》
CAS
北大核心
2014年第6期196-199,共4页
Safety in Coal Mines
基金
河南省基础与前沿技术研究计划资助项目(132300410120)
河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金资助项目(WS2012A09)
河南省教育厅科学技术研究重点资助项目(14A440012)
河南理工大学博士基金资助项目(B2008-15
B2012-093)
河南理工大学青年骨干教师资助项目
