According to project example

the vibration effect due to deep and thick silt by blasting compaction is monitored and analyzed. The decay law of vibration velocity with distance by linear fitting is obtained; and experimental research in aspects of controlling single deck maximum explosions

ascertaining reasonable millisecond delay time

regulating transmission direction of vibration waves is carried out. Results show that vibration effect is effectively controlled by these measures. Controlling single deck explosions is the most basic factor; the amount of explosions should be decided by field experiment; when single deck explosions are the same

the maximum vibration velocity can decrease by 20 percent to 30 percent if we set the millisecond delay time more than 200 millisecond; and vibration velocity in the direction of explosions central line is 15 percent to 25 percent lower than that in its vertical direction. The research result may provide a model for the similar project.