基于Drucker-Prager准则下的深部软岩巷道粘弹塑性分析  

Viscoelastic-plastic analysis of deep soft rock roadway based on Drucker-Prager criteria

作　　者：袁林[1] 高召宁[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：《矿业工程研究》2013年第1期11-16,共6页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51074003;51074005);国家自然科学基金委员会与神华集团有限公司联合资助项目(51174255);高等学校博士学科点专项科研基金资助项目(20093415120001);安徽省优秀青年科技基金资助项目(10040606Y31);中国博士后科学基金资助项目(2011M501037)

摘　　要：通过建立深部巷道的力学模型,针对深部软岩巷道的流变问题,利用德鲁克-普拉格强度准则作为岩石塑性屈服条件进行粘弹塑性解析,避免了以往使用库仑强度准则没有考虑中间主应力影响的缺点,用于更全面描述巷道围岩的屈服和塑性破坏.结合粘弹塑性流变模型进行粘弹性区和粘塑性区的应力、位移分析,并且考虑塑性区扩容效应,最终得出结论:粘塑性区的应力解比经典解大,巷道周边位移是一个随时间变化的量,若不及时支护,巷道将破坏.In order to solve the deep soft rock roadway＇ s rheological problems, this paper establishes the mechanical model of deep roadway and uses Drucker - Prager Criterion as rock＇ s plastic yield condition for viscoelastic - plastic analysis. The Coulomb Criterion did not consider the effect of intermediate stress, but the former did, so it can be more comprehensive to describe the yield and plastic failure of the roadway＇ s surrounding rock. Combined with the viscoelastic-plastic rheological model for viscoelastic and viscoplastic zones＇ stress and displacement analysis, the expanding effect of plastic zone is considered. Finally it concludes that the visco - plastic zone stress solution is larger than the classical solution, roadway peripheral displacement is a change with the time. If not timely supported, roadway will be destroyed.

关 键 词：巷道压力 软岩 Drucker—Prager准则 粘弹塑性 中间主应力 塑性扩容 

分 类 号：TD32[矿业工程—矿井建设]