The simulator Vibmas depends on equations which are based on the fundamental laws of Physics, of Chemistry, and of Rock Mechanics.  It simulates the vibrations which propagate through the rock mass starting from the region of the blast hole, caused by the movement of the fragmented rock resulting from the action of the explosion.  The user has the option to simulate the particle velocity due to a single blast hole , or that due to a number N of holes; one uses the first option if initiation is one hole at a time with a long delay between holes , or the second option if N holes are initiated on the same delay.