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.
出处
《矿业研究与开发》
CAS
北大核心
2013年第3期22-25,共4页
Mining Research and Development
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
Open- pit mining, Mineral deposit model, Dynamic optimization of mining boundary, NPV principle, L- G graph theory method
