兰营徐露天采场高陡边坡特殊段稳定性分析

Stability analysis of special sections on the high and steep slope in Lanyingxu open-pit stope

兰营徐采场深凹露天高陡边坡现已形成,随着开采深度的不断增加,其设计终高将达500 m,属超高边坡。鉴于多条较大软弱结构面赋存于矿区边坡内,且边坡易在采场穿孔、爆破、运输等作业过程中造成破坏失稳的状况,结合区域工程地质条件、岩体结构特征及破坏机理,将极限平衡分析法和离散元数值模拟相结合,通过2种方法的相互补充、相互验证,对该区特殊段边坡稳定性状况给出了合理评价,为边坡危害预防及稳定性研究提供了依据。

A high and steep slope at the Lanyingxu deep concave open-pit stope has formed. With the increasing mining depth,the final height is designed to be 500 m,which belongs to a super high slope. In view of the existence of multiple large vulnerable structural surfaces in the slope and the slope easy to be damaged and collapse in the process of drilling,blasting,transportation and so on,the paper combines limit equilibrium analysis method and discrete element numerical simulation method and,making use of the mutual supplement and verification of them,gives a reasonable evaluation of the stability of special sections on the slope based on regional engineering geological conditions,rock mass structural characteristics and failure mechanism. The study provides basis for slope hazard prevention and stability analysis.