兰尖铁矿边帮控制爆破的实践

兰尖铁矿需要用预裂爆破、光面爆破、刷帮爆破等不同的控制爆破技术来减小爆破震动及后冲对固定边坡的危害。文中概述了这些控制爆破的设计及施工中的关键问题 ;对预裂爆破布孔参数和单孔药量的选取以及缓冲孔的参数、超深、装药量和主爆孔药量与预裂爆破的关系进行了较详细的阐述。此外 ,讨论了光面爆破、刷帮爆破的布孔参数、装药量和装药结构。作者认为 ,预裂爆破可作为降震措施 ;在破碎带中可用光面爆破来保证边坡的平整和稳定 ;特殊情况下才采用刷帮爆破来清理边坡

CONTROLLED BLASTING TECHONOLOGIES USED FOR SIDE SLOPE IN LANJIAN IRON OPENPIT

In Lanjian Iron Openpit,various controlled blasting technologies,such as presplitting,smooth and slab blastings,were needed to lower the harm of blasting vibration and backbreak to the pit slope The key problems in design and construction of controlled blasting were outlined The selection of hole pattern parameters and single hole charging weight for presplitting blasting and the relationship of the parameters,subdrilling and charging weight of buffering hole and the charging weight of production hole to presplitting blasting were expounded In addition,the hole pattern parameters,charging weight and structure of smooth blasting and slab blasting were discussed The author considers that presplitting blasting can be used as the measures of vibration reduction,smooth blasting is applied in a fractured zone for the smooth and stability of side slope and slab blasting adopted only in special conditions for slope cleaning