A Vibration-Isolating Blast Technique with Shock-Reflection Device for Dam Foundation Excavation in Complicated Geological Conditions

Table 8

PPV of different blasting techniques (unit: cm/s).

Vibration sensor	BSR	Presplitting blasting		Smooth blasting
		Left	Right	Left	Right
1.0m below	11.2	20.0	35.1	15.3	11.3
1.5m below	9.5	25.6	20.5	10.7	7.9
2.0m below	3.1	24.1	16.1	11.7	7.6