The Online Monitoring and Intelligent Early Warning System for Coal Spontaneous Combustion is mainly composed of three parts: the data acquisition layer, the data transmission layer, and the control & data analysis layer. It realizes the functions of automatic underground gas sampling, analysis, and early warning. The ground host computer can display the working status of underground equipment in real time, remotely control the working mode of underground equipment, and conduct sampling and analysis of gas at designated locations. It features a high level of informatization and intelligence, and is flexible and convenient to use.

The silicate-modified polyurethane material for reinforcing coal and rock masses in coal mines is developed to address issues such as roof collapse and maintenance at coal mine working faces, roadway deformation reinforcement, and surrounding rock reinforcement under adverse geological conditions. It consists of two components, A and B, which are mixed in a volume ratio of 1:1 and undergo a rapid reaction to form a consolidated body with high strength and certain toughness. This consolidates the originally loose and discontinuous coal and rock masses into a continuous and integral stress-bearing unit, thereby achieving the reinforcement effect.

Lianshi Inorganic Coal and Rock Reinforcement Material (KWJ-Ⅰ) can fully fill and reinforce broken coal and rock masses, and eventually form a dense consolidated body integrated with the coal (rock) mass. It is used for filling and reinforcing cracks in mountain bodies, tunnels, brick walls, concrete, as well as coal and rock in mines. It is especially applicable when passing through faults, and can also be used for non-flowing sand, gravel and other ground with no bearing capacity.

This product consists of two components, Component A and Component B, which are mixed and used in a volume ratio of 4:1. The chemical reaction during the reaction process is mild with low heat generation, and the surface temperature rise before and after the reaction is within 5 degrees Celsius. It has a low initial viscosity. After being injected into the space of fractured coal and rock mass, it has excellent diffusion and penetration performance. The final generated solid can form a firm consolidated body with the coal and rock mass, featuring high compressive strength and good elastic deformation resistance. It efficiently enhances the integrity and supporting capacity of the coal and rock mass, ensuring the safe production of the mine.

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.