Shaped charge penetration of soil

[November 5]

My understanding is that due to the velocities involved in shaped
charge jets, the behaviour of their targets and themselves can to a
good approximation be considered to be hydrodynamic.

Is there a difference in the penetration depth of an identical shaped
charge on:
1. A solid lump of rock
2. That same lump of rock pre-fragmented into a coarse aggregate
3. That lump of rock broken down further into a fine aggregate

Ceteris paribus, areal density and other parameters are kept the same.

Intuitively, I am thinking that the aggregate size makes a difference;
especially if its size is comparable to the average diameter of the
jet. This is because the multiple cavities, interfaces and density
variations as the jet passes through the soil would result in
dispersion of the jet as you would expect a fluid jet to behave under
the circumstances.

N5