摘要
在假设岩体为各向同性的弹性体,只承受自重应力作用,并对其进行截头喇叭曲面开挖情况下,以喇叭曲面形边坡上环岩体为力学模型,分析其临界下滑时的应力状态,并以库仑准则作为环岩体的破坏准则,推导出了深凹边坡的稳定性坡角a与岩体的内摩擦角j,内粘聚力C,容重g,及边坡的水平半径r之间的联系关系式。该式表明了深凹边坡的稳定性坡角可随着开挖深度增加而增大的空间力学原理,它为采用减少深凹露天矿底部废石剥离量的凸曲线形边坡奠定了理论基础,也为确定其边坡的合理形状提供了初步方法。
This paper is concerned with the stress state of the trumpet slope of furrow pits during excavation. The rock mass is assumed to be homogeneous and elastic, and loaded only by its dead weight. With the coulombs criterion, the relationship of the stable slope angle, the angle of internal friction, the cohesion, the specific weight and the horizontal radius of furrow pit is derived in the paper. It is shown that the more deeply the furrow pit is excavated, the greater the stable slope angle is. The present work provides the theoretical basis of reducing stripping in furrow pits and the determination of the configuration of stable slope.
出处
《工程力学》
EI
CSCD
北大核心
2003年第5期130-133,共4页
Engineering Mechanics
关键词
深凹露天矿
边坡稳定性
剥采比
内粘聚力
内摩擦角
furrow pit
slope stability
ratio of stripping to mining
cohesion
angle of internal friction
