曼家寨采场露天开采境界收益与边坡风险关系研究

基于曼家寨采场的数字化矿山开采模型，利用3DMine软件进行境界优化，得到不同最终边坡角的开采境界方案。采用极限平衡分析法对曼家寨采场不同边坡角方案的露天境界进行稳定性分析，计算边坡的稳定性系数，对各方案的稳定性系数进行对比分析，在确保边坡安全的前提下使露天开采境界收益最大化，寻找露天开采收益与边坡风险之间的平衡点，为该露天矿山境界设计提供参考。

Research on the Relationship between the Income of Open-pit Mining and the Risk of Slope at Manjiazhai Stope

Based on the digital mine model of Manjiazhai stope， 3DMine software was adopted to optimize the open pit limit to get the mining boundary with different final slope angle. Then， the limit equilibrium analysis was used to analyze the stability of open pit boundary with different slope angles at Manjiazhai stope and to calculate the stability factor of slope. With comparison of the stability index of each program， the income of open-pit mining on the premise of ensuring slope safety can be maximized， so as to find out the balance between the open mining income and the risk of slope. This method may provide reference for the design of the open-pit boundary.