The maximum charge, in kilograms, initiated at any instant of time.

MIC is used to limit charge weight for ground vibration control.

The underlying assumption is that charges that are separated by a minimum time delay do not reinforce with regards to vibration and can be treated separately.

reinforcing vibs

Whilst this assumption is known to be flawed it helps to understand how vibrations reinforce and cancel.

Due to some work carried out in the 1960's the minimum separation for charges to be considered independent for ground vibration is 8 milliseconds.

This is known as the 8 millisecond rule.

Maximum Instantaneous Charge (MIC) is calculated by blast software such as BlastPLAN-PRO


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