Discussions between mine owners and union representatives are taking place today to discuss the number of redundancies to be made at the Unity Mine in Cwmgwrach.
ITV News has been told as many as 150 miners could lose their jobs.
An announcement is expected this afternoon.
More top news
Motorbike rider Kara Rann has died after crashing during competition at Pembrey Racing Circuit in Carmarthenshire
David Cameron promises 'to bring fairness to our constitution' but fails to spell out what that will mean for Wales
There will be some patchy rain but many areas will be dry for much of the time.