Low-temperature composite colloid material for treating air leakage of mine laneway and preventing spontaneous combustion of coal

Abstract

The invention discloses a low-temperature composite colloid material for treating air leakage of mine laneway and preventing spontaneous combustion of coal, and belongs to the technical field of coal mine safety. The low-temperature composite colloid material comprises the following components: 13-22 parts of a high-molecular compound, 10-18 parts of an inorganic filler, 5-12 parts of a polyurethane resin, and 2-15 parts of polymethyl methacrylate. According to the prepared low-temperature composite colloid material for treating air leakage of mine laneway and preventing spontaneous combustion of coal, after the material is ignited at a high temperature, the porcelainized surface can be converted into a hard ceramic protection layer, so that ablation of open fire can be effectively resisted, good mechanical strength is achieved, the hard ceramic protection layer can be formed even at the low temperature, and the temperature range of the material in the using process is expanded so as to popularize the application of the material; and the microcapsule spherical shell is broken due to stress concentration at the tip of the crack so as to fill the crack with the repairing agent contained in the microcapsule through the siphon principle, and the repairing agent and the catalyst dispersed in the material encounter to initiate polymerization reaction, so that the self-repairing purpose of the material is achieved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a low-temperature composite colloidal material for controlling air leakage in mine roadways and preventing spontaneous combustion of coal. Background technique [0002] Under the influence of ground pressure, humidity, ventilation and other factors in coal mines, the roadway is easily deformed and cracks are formed. In order to ensure the stability of the roadway, it is usually necessary to use low-temperature composite colloid materials to control the air leakage of the mine roadway and prevent coal spontaneous combustion. However, at present The low-temperature composite colloidal materials used to control air leakage in mine roadways and prevent coal spontaneous combustion still have some shortcomings, such as poor thermal stability and poor cold resistance. If the ambient temperature is high, its sealing performance will be severely affected. Under the in...

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Problems solved by technology

[0003] The purpose of the present invention is: in order to solve the low-temperature composite colloidal materials currently used to control mine tunnel air leakage and prevent spontaneous combustion of coal, there are still some deficiencies, such as poor thermal stability and poor cold resistance. , its sealing performance