2023年第1期(总第347期)黑龙江交通科技HEILONGJIANGJIAOTONGKEJINo.1,2023(SumNo.347)电子数码雷管与掏槽眼分段装药延时爆破技术在小净距超大跨径隧道的应用王亚雄(保利长大工程有限公司,广东广州510000)摘要:近年来,在我国高速发展的经济背景下,高速公路网线逐渐完善,但早期建设的高速公路由于交通量越来越大,因此越来越多的新建高速将双向八车道作为设计标准,“大跨径化”是隧道建设未来必然的趋势。大跨径小净距隧道在钻爆施工过程中,后行洞的爆破对先行洞的初支影响较大,如控制不好会造成严重的安全隐患。隧道后行洞开挖过程中,将电子数码雷管和掏槽眼分段装药延时爆破技术相结合,用于指导大跨径小净距隧道爆破参数设计。现场试验性爆破参数结果表明:电子数码雷管与掏槽眼分段装药延时爆破技术在与常规爆破技术同样爆破效率的前提下,降低了对先行洞初支约30%的振动影响。关键词:超大跨径;隧道工程;小净距;微差爆破;电子数码雷管中图分类号:U433文献标识码:A文章编号:1008-3383(2023)01-0106-03ApplicationofElectronicDigitalDetonatorandCutHoleSubsectionChargeDelayBlastingTechnologyinSmallClearDistanceSuperLargeSpanTunnelWANGYa-xiong(PolyChangdaEngineeringCo.,Ltd.,Guangzhou,Guangdong510000,China)Abstract:Inrecentyears,undertheeconomicbackgroundofChina'srapiddevelopment,theexpresswaynetworkhasbeengraduallyim-proved.However,duetotheincreasingtrafficvolumeofexpresswaysbuiltintheearlystage,moreandmorenewexpresswaystaketwo-wayeightlanesasthedesignstandard,"long-span"isaninevitabletrendoftunnelconstructioninthefuture.Duringthedrillingandblastingconstructionoflong-spanandsmallcleardistancetunnel,theblastingofthebacktunnelhasagreatimpactontheinitialsupportofthefirsttunnel.Ifitisnotwellcontrolled,itwillcauseseriouspotentialsafetyhazards.Intheprocessoftunnelbacktunnelexcavation,thecombinationofelectronicdigitaldetonatorandcutholesubsectionchargingdelayblastingtechnologyisusedtoguidetheblastingparameterdesignoflong-spanandsmallcleardistancetunnel.Theresultsoffieldexperimentalblastingparametersshowthattheelectronicdigitaldetonatorandcutholestagedchargingdelayblastingtechnologyreducethevibrationinfluenceonthe...