Means or methods for preventing, binding, depositing, or removing dust ; Preventing explosions or fires (dams E21F17/103; applying liquids or other fluent materials to surfaces in general B05)

Child Classifications

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• E21F 5/02 by wetting or spraying
• E21F 5/08 Rock dusting of mines; Depositing other protective substances
• E21F 5/14 Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions
• E21F 5/16 Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general C09K3/22)
• E21F 5/18 Impregnating walls, or the like, with liquids for binding dust
• E21F 5/20 Drawing-off or depositing dust (; while slitting E21C35/22)