Technical Overview
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.

Technical Characteristics
(1) Rapid curing time: Adopting innovative curing technology, it can form a high-strength consolidated body within several minutes.
(2) Excellent diffusion performance: Before forming a high-strength consolidated body, the mixed liquid has good fluidity, which can penetrate into the tiny cracks of coal (rock) mass, achieving ideal effects in fractured rock mass.
(3) Non-toxic and pollution-free, in line with environmental protection requirements. The material has excellent flame retardancy and antistatic properties, meeting the technical standards of KA/T 1089-2020 for polymer materials used in reinforcing coal and rock masses in coal mines.

Application Locations
(1) Reinforcement of fractured coal, rock and roof within the advance mining influence area of the working face;
(2) Reinforcement of fractured coal and rock on the top of working face supports or roadways;
(3) Reinforcement of roadway intersections to improve support strength and prevent roof fall and rib spalling;
(4) Reinforcement of fractured cracks in small coal pillars;
(5) Reinforcement of rib spalling on the working face coal wall.

Application Process
The grouting operation shall be strictly carried out in accordance with AQ1117-2020 Code for Grouting Operation of Reactive Polymer Materials in Underground Coal Mines. The construction method of this product is relatively simple, requiring only a multi-functional pneumatic pump. The two components are mixed in a volume ratio of 1:1 via a mixing gun. Under high pressure, the mixture is pressed into cavities or cracks and pores around the boreholes, where it undergoes polymerization and cures in a very short time.