lol their damage is already heavily nerffed when it comes to bomb mining… rock has 400 impulse armor, 50% impulse resistance, 75% AoE Resistance Plus the armor that is native to the planet O.o… in addition, resources take 110% damage from AoE… it’s a small wonder it even works in the first place 
it’s not an exploit… it’s meant to be much more expensive and risky