Study on preparation and performance of mine superabsorbent fire prevention and extinguishing gel

In order to seal the coal seam fissures, reduce the air leakage in the mining area, lower the temperature of the coal body and fundamentally inhibit the coal oxidation process, a superabsorbent anti-fire suppression gel material was polymerized by grafting with sodium carboxymethyl cellulose as the matrix, acrylamide and acrylic acid as the monomers, under the action of initiator and cross-linker by the cross-linking method. The gel was characterized by infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy analysis, and its fire prevention performance was tested. The results show that the gel has porous microstructure inside, dense surface structure can lock water, water absorption multiplier is up to 420, salt resistance multiplier is 56, water retention and filling confinement is good, blocking rate is more than 45%, which can carry a large amount of water to the roof coal seam and mining area for anti-fire suppression with a wide range of application scenarios.