摘要
为消除分次爆破带来的落石危害,以青岛地铁延安路车站主体Ⅱ部侧穿冠业大厦工程为背景,通过对空腔存在下的萨式公式进行回归,重新确定单段最大起爆药量,并结合多自由面存在下的减振作用,优化原爆破方案的单段最大起爆药量、掏槽型式、炮孔间排距、起爆网路等爆破参数。结果表明:优化后的全断面一次起爆方案不仅将爆破振速控制在0.7cm/s的以内、消除了落石危险,而且每爆破循环减少用时1h,节约雷管20发,节约炸药13.35kg。
To eliminate rockfall hazards brought by split blasting,this research took the main II project of Qingdao Metro＇s Yan＇an Road Station passing through Guanye building as the research background.It redefined single biggest priming dose through the regression formula of Sodev＇s empirical formula in the presence of the cavity and optimized blasting parameters of the original blasting scheme such as single biggest priming dose,cutting type,row spacing between holes,and blasting network by combining with the cushioning effect in the presence of multiple free surface.Results show that the optimized scheme of whole section one-time blasting not only eliminates the rockfall risk by controlling the blasting vibration velocity within 0.7cm/s,but also saves 20 detonators and 13.35 kg explosives by decreasing 1hper blasting per cycle.
出处
《山东科技大学学报（自然科学版）》
CAS
2016年第2期79-85,共7页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(10672091)
2015-2016年度山东科技大学研究生科技创新基金项目(YC150304)
关键词
落石
一次起爆
爆破振速
双侧壁导坑法
地铁
rockfall
one-time blasting
blasting vibration velocity
double side heading method
metro
