Abstract: The present invention is a rock dusting apparatus comprising of a pressure-sealable tank, an air distributor and a means of supplying a source of pressurized air. The air distributor is positioned inside the tank. Rock dust is then placed inside the tank which is then sealed. Air is introduced into the tank through the air distributor which includes a plurality of orifices through which the air passes. The air then mixes with, dries and suspends the rock dust particles. The air stream carrying the entrained rock dust particles exits the tank through an outlet opening thereby distributing the rock dust as required.