Dreaming about coal means feeling like temporarily hovering over with darkness; it may mean that you are encountering many difficulties in life. And you should be awakened as soon as possible and make important adjustments before your difficulties dig a deeper hole for you.
Some dreams about coal could signify an old flame, a significant person in your life or emotions. It also could represent weight of something from the past or heartache.
If you see coal burning in a dream, it usually symbolizes the soul undergoing a purification process.