摘要
基于Mohr-Coulomb和Drucker-Prager强度准则,采用数值模拟软件,对比分析了两种强度准则下的直墙拱形巷道围岩变形破坏特征及其规律,计算结果既具有相似性,也存在一定的差异。相似性是:随着侧压力系数的增加,巷道围岩应力和塑性区分布形态基本不变,塑性区呈"蝶形"扩展,围岩峰值应力逐渐提高,巷道顶、底板位移不断增加。差异性是:不同侧压力系数下的巷道顶、底板和两帮位移和塑性区范围,在Mohr-Coulomb强度准则下比Drucker-Prager强度准则下的计算结果大,而在Drucker-Prager强度准则下的围岩峰值应力比在Mohr-Coulomb强度准则下的计算结果大。
Based on the Mohr-Coulomb and Drucker-Prager strength criteria,the deformation and failure characteristics of surrounding rock of roadway with straight-wall and arched shape were compared and analyzed under two strength criteria by numerical simulation software,as well as its rules.The calculation results had similarities and differences.The similarity was as follows:with the increase of the lateral pressure coefficient,the stress and plastic zone distribution in surrounding rock of the roadway were basically unchanged,the plastic zone expanded in a"butterfly"shape,and the peak stress of the surrounding rock and the displacement in the roof and floor of roadway gradually increased.The difference was as follows:under different lateral pressure coefficients,the calculation results of displacement and the plastic zone of roadway by Mohr-Coulomb strength criterion were larger than those by Drucker-Prager strength criterion,but the calculation results of peak stress were opposite.
作者
范磊
王卫军
袁超
袁越
郭亚超
杜少华
FAN Lei;WANG Weijun;YUAN Chao;YUAN Yue;GUO Yachao;DU Shaohua(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining&Technology,Xuzhou,Jiangsu 221116,China;School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410012,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第12期28-34,共7页
Mining Research and Development
基金
国家自然科学基金重点项目(51434006)
国家自然科学基金面上项目(51874130)
国家自然科学基金青年项目(51804109)
湖南省自然科学基金资助项目(2018JJ3166)
湖南省研究生科研创新项目(CX20190794)
