We had a few eggs that didn't hatch when i had a hen go broody, soooooo, me and my bf decided that we wanted to see what was inside. So he took the first egg and cracked it open and made a loud noise and stinky rotten egg went all over him. Well, we still had 2 more eggs that didn't hatch, soooooo I put the 2nd egg in a coffee cup and poked at it with a tooth pick and bam, it exploded too. I just threw the 3rd egg at a tree and it exploded. It was so stinky. I swore I would never let my curiosity of an unhatched egg get the best of me again.
However, this last time I incubated eggs, I candled them but I was afraid to throw any out, well after my hatch was over, I put the unhatched eggs in a freezer ziploc bag and decided I was gonna bury them, well, as I was stuffing them in the hole I dug, one of them popped. thankfully, I had them in the bag, it was so gross.
But, I have to agree with everyone else. I think the hatch might be ruined.
There is nothing you can really do to prevent it from exploding, you just have to candle them and remove the bad ones so they don't have the chance to explode.