露天矿迈步搭桥的桥面宽度优化研究

Optimization research on deck width of stride bypass in surface mine

为了研究迈步搭桥开拓运输系统的最佳桥面宽度,对于中间桥进行受力分析,并建立了汽车荷载下的中间桥力学模型。根据中间桥的材料性质,确定其以圆弧滑动为主,加入汽车垂直荷载推导出了Fellenius和Bishop法的圆弧滑动修正公式,并对安家岭露天矿中间桥进行实例分析,得到其中间桥的稳定系数分别为1.032和1.167。研究结果表明,中间桥的边坡稳定系数随桥面宽度呈线性增长,安家岭露天矿中间桥的经济合理宽度为40m。

In order to study the best deck width of stepped forward bridge in transport system, it conducts force analysis for middle bridge, And the mechanics model is established with the load applied by the vehicles. Based on the material properties of the middle bridge, it can be confirmed that the circular sliding is mainly for the sliding type. Bishop and Fellenlus method of circular sliding correction formula is deduced with the vertical automobile load, And with the example analysis of Anjialing open-pit mine middle bridge, the bridge stability coefficient are 1.032 and 1.167 respectively with different building modes. The research results illustrate that the bridge slope stability coefficient demonstrates linear growth with the width of the bridge. The economic and reasonable width of middle bridge in Anjialing open-pit mine turns out 40 m.