Abstract: Blasting vibration is a key factor to induce the destruction of tunnel in underground mine.Therefore，it is important to obtain velocity attenuation law for blasting signals，and to reduce the damage from blasting vibration，which is meaningful to the safe and efficient production.In view of the footwall strike-drift seriously destructed by blasting vibration in Tiedanshan mine，the monitoring work for blasting vibration was carried out.For integrated blasting signals，the minimum scale distance was used to obtain the relationship between distances from center of explosion，explosive quantity and maximum vibration velocity.This method provided calculating parameter for Sadov's formula，whose reliability was verified.On this basis，the velocity attenuation model velocity attenuation model of blasting signals in Tiedanshan mine was established，and the largest amount of explosives per delay interval of different distance to footwall strike-drift were obtained.Then，the blasting parameters in Tiedanshan mine were improved.The measures that use the different largest amount of explosives per delay interval in different areas can meet the requirements of stability of footwall strike-drift and production capacity.

Key words: Blast vibration, Velocity attenuation, Multiple positions blasting, Sadov's formula, Safety control