Vibration safety app for iPhone and iPad

According to Peoples Republic of China national standard - blasting safety regulations
Calculation of blasting safety distance
The data required are:
K, a: The coefficient and attenuation index related to the topography and geological conditions between the blasting point and the protected object should be determined by field test.
V: protects the location of the object, allowing for particle velocity, cm/s.
The quantity of Q: explosives is equal to the total amount of blasting, and the time delayed blasting is the largest single dose, kg;
Calculation results:
R: blasting vibration safety allowable distance, metre;