Method of dusting coal mine surfaces

A method of dusting coal mine surfaces comprising:

• a) providing a dry powder formulation comprising limestone dust, dry powder foaming agent, and an additive that promotes the production of gas upon contact with water;
• b) mixing the dry powder formulation with water to generate a foamed material;
• and
• c) applying the foamed material to a mine surface.

A method of dusting coal mine surfaces comprising the steps of:

• a) providing a foam mixture comprising a foaming agent and water;
• b) incorporating air into the foam mixture to produce a foam;
• c) combining the foam and dust of at least one material selected from the group consisting of dolomite, magnesite, Class F fly ash, silica fume, gypsum, anhydrite, non-expansive clays, fine ground mine tailings, and mixtures thereof, to form a foamed material;
• d) applying the foamed material to a mine surface.

A method of dusting coal mine surfaces comprising:

• a) providing a dry powder formulation comprising dust of at least one material selected from the group consisting of dolomite, magnesite, Class F fly ash, silica fume, gypsum, anhydrite, non-expansive clays, fine ground mine tailings, and mixtures thereof, dry powder foaming agent, and an additive that promotes the production of gas upon contact with water;
• b) mixing the dry powder formulation with water to generate a foamed material;
• and
• c) applying the foamed material to a mine surface.

A method of dusting coal mine surfaces comprising the steps of:

• a) providing a foam mixture comprising a foaming agent and water;
• b) incorporating air into the foam mixture to produce a foam;
• c) combining the foam and a water-insoluble, noncombustible, fire suppressant dust, to form a foamed material;
• d) applying the foamed material to a mine surface.