The simulator ‘Maximum Flyrock Open Cut’ depends on equations which are based on the fundamental laws of Physics, of Chemistry, and of Rock Mechanics.  It simulates flyrock of the normal type, i. e. projections due to the normal action of an explosion on a rock fragment located on the horizontal free face around the top of a ‘plug hole’ or of

another hole of an open cut blast.  A simulation first calculates the launch velocity of each fragment projected from the horizontal free face around the top of a hole of an open cut blast; it uses this launch velocity together with the launch point of a given fragment to calculate the range and altitude of the flight trajectory, and stores these in a data base.  Then the simulator seeks in this data base the maximum value of the ranges of the different fragments, as well as the maximum value of the altitudes.  The maximum range and the maximum altitude are not usually associated with the same fragment.  Finally, the simulator graphically displays the trajectories of these flyrocks of maximum range and of maximum altitude projected from the horizontal free face around the top of a hole of an open cut blast, as well as the numerical values of these maximum range and maximum altitude.