A self-absorbing type coal mine safety dual-liquid grouting material and its preparation method

Abstract

The invention discloses a self-heat absorption coal mine safety double-liquid injecting paste material and a preparation method thereof. The self-heat absorption coal mine safety double-liquid injecting paste material adopts N-hydroxymethyl acrylamide, water glass, a chain extender, an initiator, a surfactant and a catalyst to form a component A and adopts polyaryl polymethylene isocyanate and acrylate to form a component B. The component A and the component B are respectively stirred uniformly and mixed according to a volume ratio during use. The water glass is utilized to react with isocyanate, double bonds of a reaction system are polymerized by utilizing generated heat, then heat storage temperature of a sizing agent after solidification is reduced, and mechanical properties of the injecting paste material are greatly improved simultaneously. The injecting paste material with low internal reaction temperature, excellent mechanical properties, good fire resistance and low cost is obtained.

Description

technical field

[0001] The invention relates to a chemical grouting material, in particular to a self-absorbing type coal mine safety double-liquid grouting material and a preparation method thereof. Background technique

[0002] At present, in the process of coal mining and production, safety accidents are prone to occur due to the complex and changeable geological conditions. For the safe production of coal mines, the coal rock mass must be reinforced by grouting. Currently commonly used inorganic grouting materials, such as water glass, cement, etc., severely limit their range of application due to poor toughness and poor cohesive force. Organic grouting materials include epoxy resin grouting materials, acrylamide grouting materials, and polyurethane grouting materials. Epoxy resin grouting materials have high viscosity and high cost; acrylamide grouting materials are very toxic . Polyurethane grouting materials have been widely used due to their moderate viscosity, ad...