Soylu also said one miner was discharged from hospital while 10 were still receiving treatment in Bartin and Istanbul.
Authorities said Turkish prosecutors have launched an investigation into the cause of the incident but initial indications were that the blast was caused by firedamp, a term referring to methane in coal mines.
Energy Minister Fatih Donmez said a fire in the mine was largely contained but fire isolation and cooling efforts were continuing after the incident that took place 350 metres (0.2 miles) below ground.
