复杂多金属露天矿山最终境界动态综合优化

为了将矿岩时间属性准确加入到复杂多金属露采矿山境界优化过程中, 提出了基于矿床块体模型的动态综合优化方法。采用当量品位的方式将多金属元素转化为综合当量品位并对矿床块模型进行经济参数赋值, 运用L-G图论法通过矿石售价折扣的方式获得一系列静态方案, 研究分析了复杂矿山的开采工艺并对各方案编排进度计划, 统计计算各方案年现金流, 经贴现获得净现值(NPV), 综合分析各方案NPV及资源回收情况确定最优方案, 实现复杂多金属露天矿山最终境界的动态综合优化圈定。基于生产进度计划的境界动态优化方法与矿山实际生产紧密结合, 其优化结果可为矿山设计及未来生产提供更好的基础支撑, 为露采矿山最优境界寻找开辟了一条新的途径。

Dynamic and Comprehensive Optimization of Ultimate Pit Limit for Complex Multi-metal Open-pit Mine

In order to accurately endow the time attribute of ore and rock into the limit optimization process of complex multi-metal open pit mining limit, a dynamic limit optimization method was proposed based on the deposit block model. Multi-metal element was transformed into synthetic grade equivalent and economic parameters were given into the deposit block model. A series of static scenarios were obtained with discount of ore price by L-G graph theory method. Mining technology was studied for complex mine and progress schedule was prepared for each scenario. After calculating annual cash flow for each program, NPV was obtained by discounting. Optimal scenario was defined by analyzing the NPV and resource recover rate of each scenario. The dynamic limit optimization method based on production schedule is closely combined with practice of ore production, the optimization result provides a better and strong basis for mining design and production, which is a new way for the optimization of open-pit limit.