水下钻爆大面积盲炮群的引爆技术

Refiring Technique of Dense Misfired Blastholes in Underwater Borehole Blasting

1997年 8月在三峡导流明渠下围堰的拆除中 ,由于围堰下压着基岩 ,形成浅埂 ,影响过流和通航 ,必须采取钻爆和清碴的方法加深。时值长江汛期 ,水位高、流速大、流态坏 ,增加了施工难度 ,钻爆中连续出现三船次 96孔 6 80m2 的盲炮群 ,后改变施工工艺 ,采用孔间补钻 ,引爆了盲炮群 ,圆满地完成了任务。

misfired Blastholes appeared in the course of borehole blasting for denolishing the cofferdam in diversion of the Chinese Three Gorges. After that the implementation technology was improved and re-drilling between blastholes was used, the misfired blastholes were successfully aredetonated.