拱形巷道线形开挖爆破分析

Analysis of Line Blasting in Arch Tunnel

拱形巷道崩落眼布置采用线形炮眼起爆顺序布置 ,可克服拱形岩石圈的拱效应 ,有利于岩石的破碎。对两种不同的炮眼布置形式进行爆破受力分析 。

The linear hole patterns and ignition sequence is adopted on the easier shots patterns of arch tunnel. The arch effection of arch rock ring can be overcome ,It is favorable for rock fragmentation.The author analyses blasting in mechanics of either hole patterns .The rationality of linear hole patterns was explained .