In the case of using blasting method to construct tunnels and house-formations in the urban or suburban area, to protect the environmental from pollution, reasonable control and accurate prediction of blast vibrations would be very important and necessary. However, it is difficult to control the blasting vibration because of many factors which could affect the distributions of the blasting waves tremendously. These factors were found and the effect related to rock fragmentation by blasting were reported in this paper. By using the data of the actual blasting wave obtained in field, both the amplitudes and the type of the wave were studied and investigated in detail. Moreover, the influence between factors which are depending on the time delay deviation of detonators, and the effect of rock fragmentation have been assessed by means of the simulation of the blasting waves. The different features between tunnelling blasting and ground surface blasting were presented according to the results of the simulation. In conclusion, a new estimation method for blasting vibrations based on the number of overlapping holes were proposed and proved to be useful for practical purposes.