关键词: 爆破开挖, 高速摄影, 声波测试, 爆破损伤

Abstract:

In blasting excavation of dam foundation of the new Fengman Hydropower Station, the most pressing problem is to control blasting vibration for ensuring safe operation of the old powerhouses. By the means of blasting control techniques like high-speed photography and acoustic testing, the trajectory of blasted flying-stone and rock mass damage are analyzed to provide basis for the selection of blasting schemes and optimization of blasting parameters. The results show that reasonable selection of blasting techniques can meet the requirements of construction intensity and blasting quality and ensure the safety of old powerhouse operation and mechanical equipment. 

Key words: blasting excavation, high-speed photography, acoustic testing, blasting-induced damage