摘要
隧道光面爆破工程的周边孔需要采用间隔装药方式,而大部分间隔装药方式采用“导爆索+雷管”联合起爆技术,此技术具有一定的局限性且经常发生拒爆现象。如何在保证隧道掘进效率的前提下提高光面爆破效果成为目前亟待解决的难题,从现场试验方面开展相关研究,提出“聚能装置+数码电子雷管”新型联合起爆技术,将其应用于高原某隧道,通过与原始的“导爆索+数码电子雷管”联合起爆技术的爆破后效果进行对比分析。实验结果表明:对比原始技术,新技术炸药单耗降低了0.2 kg/m^(3),半孔留痕率提高了5%,平均装药时间由原来的1.3 h降为1.0 h,稳定循环进尺的同时极大降低了耗材费用,提高了隧道光面爆破效果。
Smooth blasting in tunnel construction needs decked charge in the peripheral holes.However,this charging method has certain limitations and risk of misfire due to the usage of detonating cord together with detona-tor.So,it is an urgent problem to improve the effect of smooth blasting and ensure tunnel excavation efficiency at the same time.Related research was conducted by field tests,and a new initiation technology of"Shaped device+digital electronic detonator"has been proposed,which was applied to a plateau tunnel.The experimental results show that,compared with the original technology,the powder factor by using the new technology has been reduced by 0.2 kg/m^(3),the half-hole rate is increased by 5%,and the average charge time is reduced from the original 1.3 h to 1.0 h.The tunnel excavation cycle footage is stabilized,and the cost of consumables is greatly reduced,and it is ex-pected to be widely used in tunnel smooth blasting.
作者
王清标
王涛
田成林
孙永
魏祥
李中辉
王旭
李悦
WANG Qing-biao;WANG Tao;TIAN Cheng-lin;SUN Yong;WEI Xiang;LI Zhong-hui;WANG Xu;LI Yue(School of Resources,Shandong University of Science and Technology,Tai'an 271000,China;China Railway 14th Bureau Group Fourth Engineering Co.,Ltd.,Tai'an 250000,China)
出处
《爆破》
CSCD
北大核心
2024年第1期77-84,共8页
Blasting
基金
国家自然科学基金资助项目(52278359)
煤矿灾害动力学与控制国家重点实验室开放基金资助项目(2011DA105287-FW202203)
青岛市博士后资助项目(QDBSH20230202074)
泰安市科技创新发展项目(政策引导类)(2022GX089)。
关键词
隧道开挖
光面爆破
间隔装药
联合起爆技术
聚能装置
tunnel excavation
smooth blasting
decked charge
joint initiation technology
shaped charge de-vice
