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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。
Based on the analysis of the factors affecting the explosion of rock mass, the selection of rock mass solidity coefficient, acoustic impedance, explosive consumption and average fracture distance are selected as the criterions for the explosive classification of rock mass. Then the genetic algorithm is used to optimize the projection direction of the rock mass. The relation between the pyrotechnic grade y and the projection value is obtained: y = 0.270423-1.310122 + 2.7082 + 1.0137, which can be used in some underground rock mass Sexual classification. The evaluation results show that the evaluation model can avoid the influence of subjective factors on the determination of weights, and the evaluation results are objective and accurate, which provides a new method for comprehensive discriminability of rock burst.