Flame-retardant low-heat-release type gas extraction drilled hole plugging material and preparation method thereof

Abstract

The invention discloses a flame-retardant low-heat-release type gas extraction drilled hole plugging material, which comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by mass: 45 to 75 parts of polyether polyol 1, 5 to 15 parts of polyether polyol 2, 15 to 30 parts of mannich polyols, 1 to 5 parts of polyester polyol, 0.01 to 3.0 parts of catalyst, 1.5 to 3.0 parts of foam stabilizer, 1.0 to 6.0 parts of foaming agent, 10 to 30 parts of flame retardant and 0.5 to 1.5 parts of stabilizer; the component B is multi-methylene multi-phenyl polyisocyanates; and the mass proportion of the component A to the component B is 100:(100-200). The plugging material can meet a requirement of the conventional hole plugging construction process; and the prepared plugging material has the characteristics of low reaction release heat, small water foaming rate, high flame retardant, high mechanical property and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a flame-retardant and low-heat release type gas drainage drilling plugging material and a preparation method thereof. Background technique [0002] Coal mine gas drainage is a fundamental measure to make full use of natural resources, prevent and control gas disasters, and protect energy security. Sealing is an important technical process in coal mine gas extraction, and the quality of the sealing material directly affects the amount and efficiency of gas extraction. The existing two-component polyurethane grouting material used as the plugging material for gas drainage drilling has the following disadvantages: 1) generally has the disadvantage of poor flame retardancy; 2) during the sealing process, the sealing material reacts and releases a large amount of The heat in the borehole can easily cause heat accumulation, accelerate the spontaneous combustion and oxidati...

AI Technical Summary

Problems solved by technology

The existing two-component polyurethane grouting material used as the plugging material for gas drainage drilling has the following disadvantages: 1) generally has the disadvantage of poor flame retardancy; 2) during the sealing process, the sealing material reacts and releases a large amount of The heat in the borehole can easily cause heat accumulation, accelerate the spontaneous combustion and oxidation process of the coal closely bonded to the plugging material, and seriously threaten the safe production of the mine; Resulting in low compressive strength of sealed holes

High gas mines and coal and gas outburst mines often have a large mining depth, and the corresponding in-situ stress is also relatively large. In addition, the strength of the coal seam is generally low. Under the in-situ stress and mining interference, deformation and creep will inevitably occur, which will not be effective for drilling. The supporting effect leads to the continuous formation of crack air leakage channels around the drilled hole in the sealing section after the hole is sealed, which cannot guarantee the stability of the sealing effect

Images