Damage analysis on sliding and unstable failure of circular roadway under non-axisymmetric loads
LIN Zhibin
ZHANG Boyang
LI Yuanhai
Abstract：In order to effectively assess the overall stability of surrounding rock of roadway in the excavation process,a determination method of slope instability was proposed based on the classic elastoplastic model of circular roadway.A damage analysis model caused by sliding and unstable failure of surrounding rock in the top/bottom of circular roadway was established and a calculation program which could inversion analysis the model automatically and quickly was developed.Automatic inversion results show that:(1) in order to accurately determine the slide position and the stability of surrounding rock in the top/bottom of circular roadway,the formula of unstable failure model that had been deduced could not be simplify calculated;(2) the overall stability of roadway would gradually increase with increasing calculation thickness,increasing lateral pressure coefficient and reducing vertical stress;(3) the damage analysis model established not only could quantitative and qualitative analysis of the overall stability of surrounding rock,but also could point out the potential or real slide position of surrounding rock in roadway.
Keywords：circular roadwayelastoplasticoverall stabilityslipping angle
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：7( 7-13 )