摘要
By the generalized Kelvin creep model,rheological characteristics of deep softrock and long-term mechanical behaviors of support structures were simulated.Mechanicaldeformation characteristics of support structures under different lining circumstanceswere also analyzed on the basis of deducing the relationship between the generalizedKelvin creep model and implicit creep equations in ANSYS FEM software.The resultsshow that high stress of deep tunnels is the main factor in creep damage;the surroundingrock's deformation binding effect due to lining increases as the thickness increases but theeffect becomes very weak when it increases to a certain value;contact pressure on thelining decreases as its thickness decreases.
By the generalized Kelvin creep model, rheological characteristics of deep soft rock and long-term mechanical behaviors of support structures were simulated. Mechanical deformation characteristics of support structures under different lining circumstances were also analyzed on the basis of deducing the relationship between the generalized Kelvin creep model and implicit creep equations in ANSYS FEM software. The results show that high stress of deep tunnels is the main factor in creep damage; the surrounding rock＇s deformation binding effect due to lining increases as the thickness increases but the effect becomes very weak when it increases to a certain value; contact pressure on the lining decreases as its thickness decreases.
基金
Supported by Open Foundation Project of Education Ministry Key Laboratory about Mine Disaster Prevention and Control(MDPC0811)
Research Project"Spring Bud Plan"of Shandong University of Science and Technology
Shandong University of Science and Technology Innovation Fund Grant(yca2008-04-01)
