Equivalent creep damage modeling and large deformation of soft rock under complex stresses
SUN Chuang
WANG Weizhou
WANG Laigui
CHEN Dongxu
BAI Yibing
Abstract：Soft rock roadways are prone to subject to creep damage under long-term loading,infuencing their stability.This study investigated the mechanical and creep characteristics of the soft surrounding rock in field and laboratory.A nonlinear creep damage model was developed and validated using UDEC numerical simulations.The time-dependent deformation behavior was examined,and an optimized support scheme,involving lengthened pre-stressed anchor,was proposed and implemented to the field.The results show that creep rate and deformation increase with stress,prolonging the steady-state creep transition.The accelerated creep curve from simulations aligns with experimental results,confirming the model's reliability.The creep-induced deformation and expanding fissures reveal deficiencies in the original support system.The optimized scheme improves the cooperative control and stability of the support system.
Keywords：soft rock roadwaycreep damagenumerical simulationlaw of prescriptionsupport design
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 166-177 )