基于D-P准则的非均匀应力场受扰动轴对称巷道安全性分析  

Analysis of safety of disturbed and axisymmetric roadway under non-uniform stress field based on D-P criterion

作　　者：彭瑞[1] 赵光明[1] 孟祥瑞[1] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《中国安全科学学报》2014年第1期103-108,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51174005;51374013;51134012);霍英东教育基金会第十二届高等院校青年教师基金基础性研究课题(121050);教育部科学技术研究重点项目(210096)

摘　　要：为分析在非均匀应力场下受到扰动的轴对称巷道的稳定性和安全性,基于Drucker-Prager(简称D-P)准则,推导非均匀应力场下巷道塑性区范围解答方程。利用算例,分析侧压系数、原岩应力扰动系数、支护阻力等因素对巷道断面不同位置(由于对称性,只研究轴对称巷道的第1象限部分)塑性区范围的影响,并利用FLAC3D软件模拟不同侧压系数下巷道围岩塑性区的范围。结果表明:在非均匀应力场中,原岩应力扰动系数和侧压系数以及支护力对巷道围岩塑性解的影响很大;适时加大支护反力能有效控制巷道围岩的稳定性。In order to analyze the stability and safety of disturbed and axisymmetric roadway under non-uniform stress field, equations of roadway plastic zone under non-uniform stress field were derived D-P criterion. Through examples, the effects of lateral pressure coefficient, original rock stress disturbance fac- tor , support resistance on scopes of roadway cross section plastic zone scope at different positions （due to symmetry, only the first quadrant of axisymmetric roadway was studied）. Scopes of plastic zone of sur- rounding rock of roadway under different lateral pressure coefficients were simulated using FLAC3D. The results show that under non-uniform stress field, original rock stress disturbance coefficient, lateral pres- sure coefficient and support resistance , have a large effect on roadway surrounding rock plastic solution, and that timely support reaction force can effectively control the stability of surrounding rock of roadway.

关 键 词：DRUCKER-PRAGER准则 非均匀应力场 轴对称巷道 塑性区 扰动 

分 类 号：X913.4[环境科学与工程—安全科学]