基于组合赋权的台阶爆破效果灰聚类评估模型

台阶爆破效果评价是爆破生产过程中一个重要环节,直接影响到后续施工的效率。为了解台阶爆破效果,建立灰色聚类评估模型,利用混合中心点三角白化权函数,对灰色聚类法进行优化。根据台阶爆破的特点,选取大块率、松散系数、根底率、后裂距离、振动速度、飞散距离作为影响台阶爆破效果的评价指标。结合层次分析法和CRITIC分别对评价指标的主观权重和客观权重进行赋值,克服传统指标权重赋值主观性大和数据差异性敏感较大的问题;提出了一种基于离差平方和的最优组合赋权方法,建立台阶爆破效果评价的最优组合赋权-灰色聚类评估模型;以洪水台土石方平场工程项目4次深孔台阶爆破效果来检验模型的有效性和实用性,分析台阶爆破效果评价等级,确定逐孔起爆3.5 m间距为最优台阶爆破方案。

Grey Clustering Evaluation Model of Bench Blasting Effect based on Combination Weighting

Bench blasting effect evaluation is an important link in the process of blasting production,which directly affects the efficiency of subsequent construction.In order to understand the effect of bench blasting,the grey clustering evaluation model was established and optimized by using the trigonometric whiten weight function of mixed center point.According to the characteristics of bench blasting,the boulder rate,loosening coefficient,root ratio,back crack distance,vibration velocity and flying distance were selected as the evaluation indices affecting bench blasting effect.Combining the analytic hierarchy process and the CRITIC method,subjective weights and objective weights of the evaluation indices were assigned respectively,which overcomed the subjectivity of traditional index weight assignment and the sensitivity of data difference.An optimal combination weighting method based on the sum of squares of deviations was proposed,and the optimal combination weighting grey clustering evaluation model for bench blasting effect evaluation was established.The effectiveness and practicability of the model were tested by four deep hole bench blasts of Hongshuitai earthwork leveling project.In addition,the evaluation grade of bench blasting effect was analyzed,and hole-by-hole blasting with a spacing of 3.5 m was determined as the optimal bench blasting scheme.