遗传投影寻踪回归在岩体可爆性分级中的应用

在分析影响岩体可爆性因素的基础上,选择岩体坚固性系数、声阻抗、炸药消耗量、平均裂隙距作为岩体可爆性分级评判指标,建立岩体可爆性分级的投影寻踪综合评价模型,利用遗传算法优化其投影方向,得到岩体可爆性评价等级y与投影值的关系式:y=0.270423-1.310122+2.7082+1.0137,并将其应用于某地下岩体可爆性分级。评价结果表明,该评价模型可以避免主观因素对权重确定的影响,评价结果客观准确,为岩体可爆性综合判别提供了一种新的方法。

Application of Projection Pursuit Regression Based on Genetic Algorithm in Blastability Classification of Rock

Based on analysis on the factors influencing blastability of rock,the hardness coefficient and acoustic impedance of rock,explosive specific charge and mean fissure distance were chosen as the evaluation index of blastability classification of rock,a comprehensive projection pursuit evaluation model for blastability classification of rock was established,its project direction was optimized by Genetic algorithm,and the obtained relationship between the blastability evaluation grade of rock and projection value is y=0.2704z3-1.310z2+2.708z+1.0137.The evaluation model was applied to class the blastability of rock in a underground mine,the evaluation results showed that the evaluation model can avoid the influence of subjective factors on the weight of evaluation index,the evaluation result of the model is accurate and objective.It provides a new method to the blastability evaluation of rock.