Senior government official Javed Anwar said eleven coal miners were also missing after Saturday's incident in Marghat village in the Baluchistan province.
The mines are near the southwestern city of Quetta, an area where such accidents are common because of poor enforcement of safety regulations. The explosions were not linked.
In the first incident, a total of 16 person were trapped after a gas explosion in Pir Ismail, Marwar (45 km from Quetta) at around noon.
Rescue officials said a dozen of the dead miners belonged to Shangla district of Khyber Pakhtunkhwa. Some labourers are reportedly still trapped under rubble of the mine, which collapsed due to a gas explosion.
Emergency services were able to rescue nine others, who were brought to nearby hospitals. On Saturday night, two unconscious workers were rescued and bodies of two miners were recovered. At least 11 people were wounded.
Mines in Pakistan are operated by the semi-autonomous Pakistan Mineral Development Corporation.
Mining is considered highly risky in Pakistan where dozens of miners are killed each year due to lack of modern mining facilities, training and equipment.
The Pakistan Central Mines Labor Federation told the BBC that an average of 200 miners die in mine disasters every year.
He said the seven miners were working 3,400 feet deep inside the mine when the landslide occurred inside it, burying the seven, adding that the landslide might have been caused by some activity taking place under the mine.