基于改进云模型的隧道爆破效果综合评价研究

Research on the comprehensive evaluation of tunnel blasting effect based on improved cloud model

针对隧道爆破效果综合评价的不确定性问题,提出基于改进云模型与组合赋权的评价方法。结合现场工程经验与相关研究,选择平均线性超挖量、平均线性欠挖量、炮孔利用率、周边孔半孔痕率、大块率以及炸药单耗为评价指标,结合序关系分析(G1)法与基于指标相关性(CRITIC)法对各指标赋权,借助改进云模型对爆破效果数值及等级区间进行同向化处理,从而构建爆破效果综合评价模型。以某隧道为实例进行验证,模型分析结果表明在当前的爆破设计方案和生产水平下该隧道爆破效果的综合评价等级为“较好”,指明了影响爆破效果的主要因素,为进一步优化爆破设计参数提供了方向。

To address the uncertainty of comprehensive evaluation of tunnel blasting effect,an evaluation method based on improved cloud model and combination weighting was proposed.The average linear over-excavation,average linear under-excavation,utilization rate of blast hole,half hole mark rate of peripheral hole,oversize yield rate and explosive unit consumption of explosives were selected as evaluation indexes by combining field engineering experience and relevant treatises.The order relation analysis(G1)method combined with the criteria importance though intercrieria correlation(CRITIC)method was used to assign weights to each index,and the cloud model was improved to process the blasting effect values and grade intervals in the same direction,so as to construct a comprehensive evaluation model to determine the comprehensive evaluation grade of blasting effect.Taking a tunnel as an example for verification,the model analysis results show that the comprehensive evaluation grade of the tunnel blasting effect is‘better’under the current design project of blasting and production level,which indicates the main factors affecting the blasting effect and provides a direction for further optimization of blasting design parameters.