摘要
为研究岩石蠕变效应颗粒流数值模拟中岩石蠕变参数的取值方法,基于颗粒流理论,采用平面颗粒流程序(PFC^(2D))以及由Maxwell模型和Kelvin模型串联而成的Burgers模型,开展了岩石试样在单轴压缩状态下蠕变模拟试验,采用控制变量法研究了Burgers模型中弹簧的弹性模量(E_m、E_k)、黏壶的黏度系数(η_m、η_k)和摩擦因数(f)对岩石蠕变特性的影响。试验结果表明:Maxwell模型中黏壶的黏度系数η_m对岩石试样蠕变过程的影响不显著;η_k、E_m、E_k和f主要影响岩石试样的瞬时蠕变值和初始蠕变阶段的蠕变速率。
In order to study the value method of parameters in the numerical simulation of particle flow in rock creep effect,this paper carries out a numerical test of uniaxial creep of rock specimen by using planar particle Flow program (PFC^2D ) and the Burgers model which is a series of Maxwell model and Kelvin model.The paper applies the control variable method to studying the effects of the elastic modulus( Em,Ek ) of the spring,the viscosity coefficient (ηm,ηk ) and the friction factor F of the Burgers model on the creep performance of the rock.The results show that η m has no significant effect on creep performance,η k,E m,E k and f mainly affects the instantaneous creep value of the specimen and the creep rate in the initial creep stage.
作者
田佳杰
孙金山
TIAN Jiajie;SUN Jinshan(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《安全与环境工程》
CAS
北大核心
2019年第2期202-206,共5页
Safety and Environmental Engineering
