The explosion occured in a granite quarry in the community of Saint-Joseph-de-Coleraine on Monday afternoon.
No one was hurt, but the blast broke windows and cracked some of the bricks of nearby homes.
Provincial police spokesman Richard Gagné says no homes were evacuated.
He says workers at the quarry often use dynamite during excavation.
Gagné says investigators are on the scene today trying to find out what went wrong in the routine explosion.Suggest a correction