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It’s bum-fiffery. What kind of rock? How well will the penetrator penetrate aggregate, sand, shale, granite? Where’s the dang engineers to make this a useful graphic?

Many of military and ex-military engineer-types prefer to keep our mouths shut about actual numbers nad distances and dimensions.

WWII, the Grand Slam and Tallboy worked well (supersonic, very heavy conventionally-dropped bombs - see the example near Baltimore at the Armor Museum), but all too often, they did miss. Not by much, but by enough to reduce the effect, particularly against smaller targets like bridges.

B-36’s were last bombers I know of to drop the Grand Slam and its US-derivatives. Laser-aiming will improve accuracy, and conventional explosives reduce the political pressure against their use. Personally, I think the Grand Slam is prettier than these. (The C-130 super-daisy-cutter bomb is little more than box-on-a-pallet actually. It works, of course, against surface spread-out targets; it's just fugly.