摘要
Abstract
The failure modes of soft and hard rock inter-bedded slope were simulated by FLAC3D,and the stability coefficient k in the presence of different dip anglesθand rock thicknesses h was analyzed by using strength reduc-tion method.Results show that h has small influence on slope failure mode,whileθhas obvious effect on the failure mode.For horizontally layered slope,the failure mode is slipping-ripping;whereas for consequent slope,with the increase ofθ,the failure mode experiences a progress of sliding-ripping,sliding,sliding-buckling,and bending-buckling;while for vertically layered slope,the failure mode is bending-slump;and for anti-dip rock slope,the failure modes are sliding-buckling and bending-toppling.Moreover,for gentle bedding rock slope,the thickness of the rock has little impact on the stability coefficient k,which is determined by the soft rock near the slope toe.As for the other types of layered slope,when the thickness of soft rock is constant,the stability coefficient increases with the increase of hard rock thickness,while when hard rock thickness is constant,the stability coefficient de-creases with the increase of soft rock thickness.With the increase ofθ,the k value of consequent slope first de-creases and then increases,while the k value of anti-dip rock slope increases and then decreases and finally increa-ses.The overall stability of soft and hard rock slope follows the order of vertical layered slope>steep bedding rock slope>anti-dip slope>horizontal layered slope>gentle bedding rock slope.关键词
层状边坡/软硬岩互层边坡/破坏模式/稳定性/强度折减法Key words
layered slope/inter-beddings of soft and hard rock/failure mode/stability/strength reduction method分类
天文与地球科学
