Study of tunnel roof anti-impact and energy absorption effect on block overburden rock mass failure
WANG Kaixing
DOU Linming
PAN Yishan
KIRYAEVA T A
Abstract：By computating tunnel roof response on the dynamic propagation in block overburden rock mass,the influence of overburden rock mass failure degrees and failure depths to impact energy dissipation was studied in theory during the dynamics propagation.The results show that,when failure degrees of overburden rock mass increass,the initial times of tunnel roof response is delaed obviously.It is effectively delay the transmission of shock energy.At the same time,the impact force,kinetic energy and displacement amplitude of tunnel roof are all attenuated.The attenuation of tunnel roof impact force is obviously.Therefore,the impact energy can be dissipated through the failure of overburden rock mass and energy absorption,and antiimpact can be realized by different degrees of overburden rock mass failure.The influence of failure depths in overburden rock mass to energy dissipation is also studied.There is a positive correlation between the attenuation of tunnel roof impact force,kinetic energy,displacement and failure depths in overburden rock mass.But the attenuating range has a non-uniformly variation relationship depend on the overburden rock mass failure depths.
Keywords：rock burstenergy absorption and anti-impactblock rock massdynamic response of tunnel rooffailure of rock mass
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：8( 1211-1217,1230 )