Evolution law of stress displacement during excavation of rock high steep slope
ZHU Jingkai
XIAO Jifei
HU Ping
LIU Yuchen
YANG Jia
Abstract：In order to study the evolution law of stress displacement of high and steep rock slope during excavation and unloading,FLAC3D software is used to analyze the stress displacement state of the slope,and the influence law of excavation depth and slope angle on the stress field,displacement field and stability of the slope during excavation is explored.The results show that the curvature radius of horizontal stress decreases with the increase of excavation depth,forming a"wedge"stress structure in the slope,and the peak horizontal stress decreases with the increase of excavation depth.The displacement increases with the increase of excavation depth,and the vertical displacement presents an arc spreading trend from the bottom plate to the bottom,and gradually evolves into a circular arc sliding trend with the continuous increase of excavation depth.With the increase of slope angle,the total displacement curve of slope body can be divided into three stages:steep increase in the early stage,slow increase in the middle stage and gentle development in the late stage.The stability coefficient of slope decreases with the increase of slope angle and excavation depth,and the potential failure mode is circular sliding failure.
Keywords：high and steep slopeexcavation unloadingstress evolutiondisplacement evolutionstability
Publication Date：2025-10-15
Online Publishing Date：2025-12-12(First online date of this platform, not the publication date of the document)
Pages：5( 16-20 )