Originally Posted by
mylord7
I have faced the same problem in the past (a long time ago) twice! It's a temporary glitch of the server.
Don't go on mining when you see this, because the game after a few minutes always rolls back to the previous state.
Hopefully you won't lose your used bombs, but for sure you will spend your valuable real time for nothing!
Force close your game, login again and give a couple of tries on mining.
If the glitch goes on, then leave the mine for a short future time, when the server's load is back to normal!