Abstract: In order to efficiently seal air leakage to prevent spontaneous combustion of coal, a solidified foam of organic minerals with high inflation rate, rapid response, adjustable coagulation time and environment-friendly was preliminary developed. The foaming mechanism and bubble-steady mechanism of this organic solidified foam were theoretically discussed, and the performance index of the solidified foam with different components was studied. Then, the paper introduced the feature and utilization of the solidified foam. Good effects on controlling coal spontaneous combustion at W2 return-tunnel of Xiaoqing Coal Mine were achieved by adopting this foam.

Key words: Spontaneous combustion of coal, Solidified foam, Foam, Obturation