地下厂房光面爆破参数优化与应用研究  

Optimization and Application of Smooth Blasting Parameters for Underground Powerhouse

作　　者：张成君 ZHANG Chengjun(China Railway 14th Bureau Group Shield Engineering Co.,Ltd.,Nanjing 211899)

机构地区：[1]中铁十四局集团大盾构工程有限公司,南京211899

出　　处：《现代隧道技术》2020年第4期136-140,共5页Modern Tunnelling Technology

摘　　要：为控制地下厂房开挖轮廓以及减小爆破对岩体的损伤,需对光面爆破参数进行优化。文章根据理论公式计算得出光面爆破参数,并以炮孔间距、线装药密度、抵抗线大小为光面爆破影响因素,半孔率为评价指标,开展L9(34)的正交试验。通过正交试验直观分析和方差分析得出最优组合的爆破参数。现场实验结果表明,采用分析得出的最优爆破参数进行爆破试验,其开挖轮廓平整且没有超欠挖,达到了预期效果。In order to control the excavation contour of the underground powerhouse and reduce the damage to the retained rock mass,it′s necessary to optimize the parameters of smooth blasting.The parameters of smooth blasting are obtained based on the theoretical calculation,and orthogonal experiments are conducted by taking borehole spacing,linear charge density and burden as the influencing factors of smooth blasting and taking half-hole ratio as the evaluation index.The optimal blasting parameters are obtained by visual analysis and variance analysis of or⁃thogonal experiment.The field test results show that smooth excavation contour is realized and desired effect is ob⁃tained with the optimized blasting parameters.

关 键 词：地下厂房 光面爆破 参数优化 正交试验 轮廓控制 

分 类 号：TV542[水利工程—水利水电工程]