Research Article

Preparation and Stability of Inorganic Solidified Foam for Preventing Coal Fires

Figure 7

The change curves of stability coefficient and foam expansion ratio with different factors. (a) Independent variable is FV and constants are 30 wt.% of FA and W/S of 0.4; (b) Independent variable is FA and constants are 8 V of FV and W/S of 0.4; (c) independent variable is W/S and constants are 8 V of FV and 30 wt.% of FA.