Low-temperature safety polyurethane injecting paste material for coal-rock mass reinforcement and preparation method thereof

Abstract

The invention provides a low-temperature safety polyurethane injecting paste material for coal-rock mass reinforcement and a preparation method thereof, and belongs to the field of polyurethane compositions. The material consists of a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 100 parts of polyether polyol, 0.2 to 2.0 parts of catalyst, 0 to 5 parts of antistatic agent, and 20 to 30 parts of flame retardant; and the component B comprises the following raw materials in parts by weight: 70 to 90 parts of polyisocyanates, 5 to 20 parts of pre-polymer, and 5 to 10 parts of viscosity reducer. The preparation method comprises the following steps of: (1) preparation of the component A, namely mixing the raw materials of the component A for later use; and (2) preparation of the component B, namely mixing the raw materials of the component B, and performing nitrogen displacement for later use. The low-temperature safety polyurethane injecting paste material has the advantages of flame retardant and antistatic performances, high adhered strength, strong shearing resistance and high toughness. The preparation method is simple and practical, has low requirements on production equipment and staff, and is short in production cycle; and according to the whole process, three wastes are not produced, and the environment and health of workers are not influenced.

Description

technical field

[0001] The invention belongs to the field of polyurethane compositions, and in particular relates to a low-temperature safe polyurethane grouting material for coal and rock mass reinforcement and a preparation method thereof. Background technique

[0002] In the process of coal mine production, there are often complex geological conditions that greatly affect mining efficiency. Coal seams and surrounding rocks are often affected by faults and mining pressures, resulting in fragmentation and deformation. Under the influence of high stress and strong mining, slipping, cracks, Collapse and other safety hazards. Grouting reinforcement is extremely effective in solving broken coal (rock) mass reinforcement. The principle of grouting reinforcement is to use grout to fill the cracks in the surrounding rock, consolidate the broken coal and rock mass, improve the overall strength of the surrounding rock, and thus enhance its own bearing capacity. There are many fact...

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