基于数字矿床模型的露天境界动态优化  

Dynamic optimization of Open-pit Mining Boundary Based on Digital Mineral Deposit Model

作　　者：卢立松 孟中华[2,3] 李志国[4] 

机构地区：[1]保利矿业投资有限公司,北京100010 [2]长沙矿山研究院有限责任公司,湖南长沙410012 [3]金属矿山安全技术国家重点实验室,湖南长沙410012 [4]武汉工程大学,湖北武汉430073

出　　处：《矿业研究与开发》2013年第3期22-25,共4页Mining Research and Development

摘　　要：露天矿山开采境界圈定的合理性与矿山效益直接相关,为科学、简便的得到最优露天开采境界,借助三维数字矿床模型,结合NPV原理,采用L-G图论法,充分考虑贴现率、矿石的不同品级售价及不同岩石类型比重等现实情况,利用块段模型属性运算,以采剥进度计划所得各块段采剥年度值,计算块段净现值,以净现值为优化目标,做出投资方案评价,实现露天开采境界动态最优化计算。以某铁矿为例进行了动态优化计算,最终优化结果相较境界初始解,采剥总量减少210.4万m3,平均剥采比由2.25减小到1.52,效果明显。The delineation of open- pit mining boundary is directly related to the benefits of mine. In order to make the determination of open- pit mining boundary scientific and easy, with three-dimensional digital mineral deposit model, combining with the NPV principle,using L-G graph theory method and taking full account of the reality of the discount rates, the prices of ore with different grades and the specific gravities of various rocks, by using block model attributes calculation,based on annual stripping amount obtained according to stripping schedule the net present value of block segment was calculated. Then taking the net present value as optimization objective, the evaluation of investment project was made to achieve the dynamic optimization of open-pit mining boundary. Taking an iron mine as example, the dynamic optimization of open- pit mining boundary was car ried out,and the optimized result brought out a decrease of total stripping amount of 2. 104 million cubic metres and average stripping ratio decreases from 2.25 to 1.52 comparing with the initial solution of open-pit mining boundary, so the was obvious.

关 键 词：露天开采 矿床模型 境界动态优化 NPV原理 L— G图论法 

分 类 号：TD216[矿业工程—矿井建设]