龙头-硐底石灰石矿露天采场设计边坡稳定性评价

Stability evaluation of open-pit design slope in Longtou-Dongdi limestone mine

为了论证四川龙头-硐底石灰石矿设计边坡的稳定性,采用phase模拟软件分析了边坡剪应力与位移变化规律;采用slide极限平衡分析软件计算了边坡的安全系数。研究结果表明:各边坡剖面在工况Ⅰ、工况Ⅱ、工况Ⅲ与工况IV条件下,计算所得边坡整体安全系数均大于许用安全系数,设计的边坡角情况下,边坡整体是稳定的;坡体的破坏区主要为拉应力破坏区和剪切破坏区,拉应力破坏区主要分布在台阶坡面及坡面底部与平台交接区域,剪切破坏区主要分布在坡体深部岩体和坡脚;边坡最大位移值出现在坡体中部范围。

In order to demonstrate the stability of the designed slope of Longtou-Dongdi limestone mine in Sichuan,the article analyzes variation law of slope shear stress and displacement by using phase simulation software,calculates the safety factor of slope by slide limit equilibrium analysis software.The research results show that under the conditions of working conditions I,II,III and IV,the calculated overall safety factors of the slope are greater than the allowable safety factors.Under the designed slope angle,the slope is stable.The failure zone of the slope is mainly tensile stress failure zone and shear failure zone.The tensile stress failure area is mainly distributed in the step slope and the intersection area between the bottom of the slope and the platform,the shear failure area is mainly distributed in the deep rock mass and toe of the slope,and the maximum displacement value of the slope appears in the middle of the slope.