渗流作用下圆形巷道围岩抗力系数计算  

Calculation for surrounding rock resistant coefficient of circle tunnel under the action of seepage

作　　者：张贺[1] 孙珍平[1] 徐先胜[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：《中国安全生产科学技术》2012年第12期27-31,共5页Journal of Safety Science and Technology

摘　　要：将巷道围岩视为多孔介质,考虑地下水渗流作用的影响,采用塑性强化理论,推导出了巷道围岩抗力系数计算公式。该式比较全面的反映岩石抗力系数与围岩的几何、力学特性参数和受力状态的关系。其函数关系可以表示为:K=f(P0,P1,Pi,r0,r1,r2,b,σs,β,μ,E,μ0,E0),与巷道围岩所有影响因素在同一公式中得到了明确的表达。当不考虑渗流作用,改变公式中相应的参数可以演化为经典的围岩抗力系数表达式的相似式,具有一定的实用价值。Taking the surrounding rock of tunnel as porous medium,the rock resistant coefficient of tunnel was deduced based on plastic strain-harding theory in view of the influence by ground water permeation.The formula reflects more comprehensively the relation of rock resistant coefficient with stress state and parameters of geometric and mechanical properties.The functional relationship can be expressed as： K=f（P0,P1,Pi,r0,r1,r2,b,σ s,β,μ,E,μ 0,E 0）,which shows clearly with influencing factors of surrounding rock of tunnel in the same formula.Without considering the action of seepage,when changing the corresponding parameters of the formula,the similar formula of classical formula of rock resistant coefficient can be evolved.And it has certain practical value.

关 键 词：渗流 圆形巷道 塑性强化理论 破裂分区 岩石抗力系数 

分 类 号：X936[环境科学与工程—安全科学]