合计5611.241合计23755.7VI围岩钻爆参数序号台阶段位炮眼数炮眼深度度炮眼装药量每孔单孔单段合计药卷数装药量药量个m卷/孔Kg/孔Kg1上台阶①部1121.120.44.8236120.42.4351911.50.35.747811.50.32.45933110.26.66合计7821.97中导②部3211.50.30.685311.50.30.997311.50.30.9109511.50.31.51111311.50.30.912138110.21.613③部3211.50.30.6145311.50.30.9157311.50.30.9169511.50.31.51711311.50.30.918138110.21.619合计4812.820下导④部3211.50.30.6215211.50.30.6227311.50.30.92395110.2124⑤部3211.50.30.6255211.50.30.6267311.50.30.92795110.2128合计246.229核心土⑥部3211.50.30.63053110.20.6317411.50.31.23295110.213311611.50.31.834135110.2135156110.21.236合计317.437仰拱⑦部312110.22.438517110.23.439727110.25.440合计5611.241合计23759.53.3、个别飞石防护根据我公司以往的施工经验,隧道掘进爆破的飞石主要为掏槽爆破飞石,而且有着很强的方向性,会沿着隧道轴线呈一定角度扇形飞岀,本方案采用上下台阶开挖法施工,在各隧道进岀口段50m内施工时,应对隧道口正前方向进行飞石防护,可在隧道口正前方10m左右搭设防护架,防止飞石飞出,防护架长15m,高10m,每洞口一个,共4个。五、施工组织1、?工程概况如前述
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