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When ever explosive substances are used to blast, a large amount of vibration occurs. This vibration is not only dangerous for people working their but also to the neighboring structures. Therefore proper care must be taken to keep vibration in check.
The vibrations caused by blasting are related to velocity (V), wavelength (L) and frequency (f) as
Now Velocity V depends on the amplitude of the vibrations A and is given by
Where p – pie = 3.14
Case – When we know velocity velocity v1 at a distance D1 from the explosion and wish to find velocity v2 at a distance D2 from the explosion
The scaled-distance formula is used for vibration control
b and H are constants and depend on site.
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