Visco-elastical analysis on interaction between surrounding rock mass and liners of two support processes
Abstract：In the underground rock engineering,the mechanical properties of surrounding rock mass exhibits time-dependent,as long as the rock mass stress level reaches or exceeds the rock theological limit.In this paper,based on the viscoelastic theory,a time dependent viscoelastic model of coupling action between surrounding rock mass and support,which includes the two support process and the spatial effect of excavation face,was employed,and the analytical solution was obtained.At the same time,according to the solving method advised by this paper,the coupling action between surrounding rock mass and many supports could also be obtained.Then,the influence of the installation time on the support force was discussed in detail by a case.The results show that the installation time has a certain impact on the stability of tunnel.With the increase of the first installation time,the support force between surrounding rock mass and first support decreases,but the support force between first support and second support increases.With the increase of the second installation time,the support force between surrounding rock mass and first support and the support force between first support and second support both decrease.
Keywords：Surrounding rock massviscoelasticitycouplinginstallation time
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 528-536 )