NOTE:
This page does not include foam dust control applications

Foam has been used for stimulating coal degasification wells:

Weng, X., et al, US Patent 5,474,129, December 12, 1995 
Cavity Induced Stimulation of Coal Degasification Wells Using Foam

Foam has been used for the application of wet coal flow aids:

Kober, A. E., US Patent 4,605,568, August 12, 1986
Application of Foam to Improve Flow Characteristics of
Water-Insoluble Products

Roe, D.C., U.S. Patent 5,079,036, July 7, 1992
Method of Inhibiting Freezing and Improving Flow and Handleability 
Characteristics of Solid, Particulate Materials

Foam has been used as a medium for rock dusting in coal mines:

Gay, F.T., et al, US Patent 6,726,849, April 27, 2004
Method of Dusting Coal Mine Surfaces

Foam has been used as a barrier for methane in coal mines:

Taber, J.J., et al, "A Study of the Use of Foam to Control Methane Emissions in Coal Mines,"
Bureau of Mines Report 40-76, USBM Grant GO144067, NTIS PB250367 February 9, 1976.

E-MAIL "Foamman"