Pulverized fuel ash-cement foam material for controlling spontaneous combustion of coal and preparation method of pulverized fuel ash-cement foam material

The invention discloses a pulverized fuel ash-cement foam material for controlling the spontaneous combustion of coal and a preparation method of the pulverized fuel ash-cement foam material. The pulverized fuel ash-cement foam material is prepared from the following components by weight: 10-40 % of sulfoaluminate superfine cement, 10-40 % of pulverized fuel ash, 0.5-0.9 % of carboxymethyl cellulose, 0.1-0.6 % of sodium fluoride, 0.2-0.6 % of melamine, 0.1-0.4 % of aluminum sulfate, 0.3-0.6 % of lauryl sodium sulfate, 0.4-0.6 % of sodium dodecyl benzene sulfonate, 0.5-0.8 % of saponin and the balance of water. The foam material is high in expansion rate of foam, long in stabilizing time, low in rate of water loss, good in plugging performance, and very suitable for extinguishment underground a coal mine. The pulverized fuel ash-cement foam material has the advantages of being low in cost, good in plugging performance, high in strength, simple to construct and the like.