Under the action of mine pressure, underground coal pillars, roadway surrounding rocks and closed wall surrounding rocks are prone to fragmentation, forming certain air leakage channels. This not only causes the oxidation and spontaneous combustion of residual coal areas or surrounding rock coal bodies, but also creates channels for the diffusion and overflow of harmful gases such as gas. To address the problems existing in conventional materials—including the easy loss and low utilization rate of low-viscosity fluid sealing materials, the fast setting speed and low permeability of consolidated filling materials, the high heat generation, high temperature and potential risk of secondary disasters of organic reinforcement materials, and the formation of new air leakage fractures due to secondary crushing of reinforcement and consolidation bodies under pressure—our company has innovatively proposed the plastic sealing technology.

Composite Gel (High Water-Retention Hydrogel) (MAG-Ⅱ) fire prevention and extinguishing material is mixed with water in a certain proportion, it can form a viscous fire prevention and extinguishing gel within a few seconds. The formed gel has good fluidity and coverage in the initial stage, allowing it to spread and accumulate in limited spaces. As time goes on, the viscosity of the gel gradually increases, further exhibiting excellent adhesion and wall-hanging properties. It can form a dense, high-water-content gel protective layer on the surface of floating coal and between cracks, featuring superior functions of heat absorption, cooling, oxygen isolation, and temperature reduction, thus achieving a significant fire prevention and extinguishing effect.

Composite gel (high water-retention hydrogel) (MAG-Ⅰ) is a grouting-enhanced fire prevention and extinguishing material. When used in combination with yellow mud slurry and fly ash slurry, it can significantly increase the slurry concentration, reduce the risk of pipeline blockages and bursts, improve grouting efficiency and quality, largely avoid the phenomenon of channeling during single grouting, enhance the filling effect, prolong the retention time of water in the goaf, and at the same time reduce the unit grouting cost.

Eakt Slurry Colloidal Foam (FJP-Ⅱ) was developed to address the problems of large-area coal spontaneous combustion in underground coal mine gobs and the difficulty in controlling hidden and unknown fire sources. Compared with the shortcomings of traditional yellow mud grouting, such as easy loss along gullies and inability to spread to high positions, Eakt Slurry Colloidal Foam enables yellow mud slurry to self-foam and generate inert gas by adding two components. The formed mud colloid can spread, accumulate and cover in the gob with foam as the carrier, which can bring more water and yellow mud slurry into the high, medium and low positions of the prevention and control space. It also has good accumulation performance, greatly improving the fire prevention and extinguishing effect.

To overcome the shortcomings of traditional yellow mud grouting or fly ash grouting, such as easy loss along gullies and inability to spread to higher positions, Yikete Mud Inhibiting Foam uses specialized equipment to convert yellow mud or fly ash into mud foam. The resulting mud inhibiting foam can spread, accumulate, and cover in the goaf with the foam as a carrier, bringing more water and yellow mud into the high, medium, and low positions of the treatment space. This technology integrates four prevention and control methods—mud, nitrogen, water, and inhibitor—utilizing the covering property of yellow mud, the suffocating property of nitrogen, the cooling property of water, and the inhibiting property of the inhibitor for joint treatment, greatly improving the effectiveness of fire prevention and extinguishing.

Gainike Non-rebound Rapid-hardening Spraying Material (JPW-Ⅰ) is an inorganic powder material composed of fly ash, cement, and additives. When mixed with water, it hardens and forms a strong sealing function, which can effectively seal the surface of coal-rock roadways. It can prevent the leakage of harmful gases, isolate the supply of oxygen to coal bodies to inhibit coal oxidation, and simultaneously has excellent properties such as pressure resistance, water resistance, flame retardancy, and anti-static performance. The material features low dust generation during on-site construction, good adhesion, low rebound rate, fast setting time, high compressive strength, and is safe, environmentally friendly, non-toxic, and non-irritating.