基于AHP及主成分分析法评价大黑山钼矿逐孔起爆效果

逐孔起爆是露天矿台阶爆破的发展趋势,但露天矿生产中参数选择多是依据生产经验。为优化选择大黑山钼矿逐孔起爆参数,通过孔网结构等参数之间的不同组合试验,选取平均块度,大块率,炸药单耗等8项评价因子并借助split-desktop方法对因子进行量化。采用AHP法建立目标层,控制层,因子层结构模型,使用几何平均法获得因子权重,并进行排序,前三项为:平均块度炸药单耗大块率;利用线性插值法对评价因子进行单因子评分,得到各组试验的综合评分。选择主成分分析法,使8项评价因子降维,对影响显著的单因子评分及综合评分与各爆破参数的关系进行拟合,得到影响规律。试验验证了优选参数的合理性,爆破效果综合得分92.6分,取得了满意的效果。

A Comprehensive Evaluation of Hole by Hole Initiation in Daheishan Molybdenum Mine Based on AHP and Principal Component Analysis

Hole by hole initiation is the trend of bench blasting in the open pit, but parameters in open-pit mine production depend mainly on operation experience. To optimize hole by hole priming parameters of Daheishan molybdenum mine, experiments on parameters such as pore structure was performed, average degree of fragments, block rate, explosive consumption and other 5 factors were considered as evaluation index and the split-desktop method was used to quantify those factors. AHP method was used to establish structure model of target layer, control layer and factor layer. Geometric mean was used to get weight value and the first three factors were average degree of fragments>block rate>explosive consumption. Then linear interpolation was used to give score to evaluation index and comprehensive scores for each group were obtained finally. Principal Component Analysis was chosen to achieve dimensionality reduction for those eight evaluation factors. The relationship between significant single-factor and composite score with the blasting parameters were fitted to obtain influence law. Reasonableness of the parameters were verified and composite score is 92.6.