【摘要】 为改善使用钻爆法掘进隧道过程中的爆破效果，减少“超欠挖”现象，本文基于数值模拟，探究了聚能药包的爆破效果与周边眼的装药结构。通过LS＿DYNA有限元分析软件针对常规爆破、切缝聚能药包爆破和异形聚能药包爆破进行数值模拟对比分析得出最优爆破方法，并调整周边眼炮孔间距得出炮眼的最佳布置。研究结果表明：与常规爆破相比，聚能爆破可显著提高爆破效果；与切缝药包聚能爆破相比，异形药包聚能爆破的聚能效果更好，光面爆破效果更佳。建议在隧道周边眼采用异形药包聚能装药结构；周边眼的炮孔间距定位80 cm,可取得较好的爆破效果与经济效益。研究结果可为光面爆破周边眼设计提供指导，提高爆破效果。更多还原

【Abstract】 In order to improve the blasting effect in the process of tunnel excavation by drilling and blasting method and reduce the phenomenon of ‘overbreak and underbreak’, based on numerical simulation, this paper explores the blasting effect of shaped charge and the charging structure of surrounding holes. The optimal blasting method is obtained by numerical simulation and comparative analysis of conventional blasting, slit shaped charge blasting and special shaped charge blasting by LS＿DYNA finite element analysis software, and the optimal arrangement of blasthole is obtained by adjusting the spacing of surrounding blastholes. The results show that compared with conventional blasting, shaped charge blasting can significantly improve the blasting effect. Compared with the slit charge shaped blasting, the shaped charge shaped blasting has better energy-gathering effect and better smooth blasting effect. It is suggested that the shaped charge assembly with shaped charge structure should be adopted in the surrounding holes of the tunnel. The blasthole spacing of the surrounding holes is 80 cm, which can achieve better blasting effect and economic benefits. The research results can provide guidance for the design of the peripheral eye of smooth blasting and improve the blasting effect.更多还原