What if there's a leak in the salt mine? I mean, a salt mine is just a large hole in the ground. What assurance do we have that it doesn't have any hairline cr

What if there's a leak in the salt mine? I mean, a salt mine is just a large hole in the ground. What assurance do we have that it doesn't have any hairline cracks through which compressed air can escape? And if the air does begin to escape and erode the surrounding rock, how do you prevent a massive explosion occurring at some point? Is the weight of the rock above the cavern enough to keep the air compressed at 1100 psi?