Particle interaction between events

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Depends on what you're after. PhysX? Or Particle Physics? Need more info.

Whichever works best for the outcome, in fact there may be a better approach all together. I am trying to blow a sculpture away, bit by bit using wind. My issue is that I do not want the far end of the sculpture to be affected by the wind until the front end has worn away. Previous iterations have been successful in wearing it away, but because all voxels are particle-bound, there is a sway to the entire sculpture. Was thinking that a property test operator could work, but haven't found the right condition to test for.

Instead, I thought, if I could send particles through wind towards the voxels, I could have them collide and delete to activate a force operator on the voxels. 

Thank you for your time.