Technology is developed for the prevention and control of coal spontaneous combustion in areas such as goafs of steeply inclined working faces, goafs of upward/downward mining working faces, and fractured zones of roadway surrounding rocks, as well as for the sealing of air leakage channels like working face corners, support roofs, and shallow goafs behind supports.

JTF‑Ⅳ is designed to prevent coal spontaneous combustion in goafs and abandoned roadways. Composed of Materials A and B, it forms an inorganic high-water gel with low viscosity. The gel penetrates well, seals leaks, and cools fire zones effectively.

JTF‑Ⅱ targets coal spontaneous combustion in roadways, support tops and air leakage at upper and lower corners. Materials A and B mixed at a 1:1 ratio form cured foam with over 10‑fold expansion without heat generation, avoiding the high heat release of traditional polyurethane fillers. With low initial viscosity, it penetrates well into broken coal and goafs, forming a dense structure with excellent sealing, heat absorption and cooling performance.

JTF-I uses microcapsule technology to overcome drawbacks of traditional mine fire control methods. Its gelling material is activated after foaming to achieve first foaming then gelling. This technology integrates the strengths of grouting, inert gas, gel, inhibitors and foam systems while avoiding their weaknesses.