Sounds like a classic “keep the door open while you blast the walls” situation. If you can get a decent clearance and keep the blast controlled, it works. Just make sure the debris you’re turning into a door stays solid and you’ve got a plan for the smoke and dust. Don’t let that extra weight collapse the entrance—keep a hand on the hinges. Overall, if you’ve scoped the blast zone and the exit path, it’s a solid move.