隧道无掏槽齐发崩落爆破应用研究  

Research on Application of Non-undercutting Simultaneous Break Blasting for Tunneling

作　　者：师百垒 戴俊[1] 武宇[2] 吴丙权[3] 池佐华 盛骁[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,西安市710054 [2]中国矿业大学力学与建筑工程学院,北京市100083 [3]黄河水利职业技术学院土木与交通工程学院,开封市475004

出　　处：《公路》2016年第11期261-265,共5页Highway

基　　金：国家自然科学基金资助项目;项目编号51174159

摘　　要：为了解决掏槽爆破所遇到的问题,基于无掏槽爆破技术的提出,进行了无掏槽齐发崩落爆破基本原理分析,无掏槽爆破装药结构和起爆次序具有一定的独特性,它是通过孔内分段延期连续起爆来实现的,其降低了孔底岩石抗爆力和爆破夹制作用,探讨了无掏槽爆破技术相关参数,包括单孔装药量、孔内分段数、齐发崩落孔深度和间距、周边孔光爆参数等,并应用于某公路隧道工程。结果表明,无掏槽爆破的优越性体现了其很好的发展前景;无掏槽爆破参数决定于装药结构、起爆次序、炸药性能和岩石特性;周边孔最后起爆相当于预留的光爆层;研究成果成功应用于公路隧道开挖中,取得良好的效果,可为类似工程提供借鉴。In order to solve the problems encountered of cutting blasting, on the basis of putting forward non-undercutting blasting, in the paper, the basic principle of non-undercutting simultaneous break blasting is analyzed, which is done by millisecond delay continuous initiation in hole, the charging structure and detonating sequence of non-undercutting blasting have a certain uniqueness, the antiknock force and clipping action of rock is reduced, the non-undercutting blasting parameters are discussed, including single charge weight, section number in hole, depth and spacing of simultaneous break hole, smooth blasting parameters and so on, and it has been applied in a highway tunnel project. The results show that. the advantages of non-undercutting embodies its good development prospects; non-undercutting blasting parameters are dependent on charging structure, detonating sequence, explosive property, rock properties ; the around hole is equal to the reserved smooth blasting layer; and the study result has been used in the excavation of highway tunnel and good results have been achieved. The paper can provide reference for similar projects in the future.

关 键 词：隧道 无掏槽 孔内延期 孔内分段 爆破参数 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]