Aren't shape charges using a solid in combination with the explosive to make a more concentrated focus of energy? I can't find a way in which you could focus just the blast itself without getting a opposite reaction (2nd law), and we're talking having to move large volumes of water, not punch holes into anything.
Best way I can think of is to create a directed wave in the same way an earthquake fault movement does, through displacement, but you're talking enormous energies to move that much mass.
Best way I can think of is to create a directed wave in the same way an earthquake fault movement does, through displacement, but you're talking enormous energies to move that much mass.