Gradient cooling method for surrounding rock surface of mine and gradient cooling device

Abstract

The invention discloses a gradient cooling method for the surrounding rock surface of a mine and a gradient cooling device, and relates to the technical field of mine cooling. The gradient cooling method for the surrounding rock surface of the mine shaft comprises the steps that the surrounding rock surface of a mine roadway is laid with gradient cooling plates, and cold air circularly flows in the gradient cooling plates to bring away heat on the surrounding rock surface; by means of the method, heat in the mine can be effectively transferred, and the heat damage mine working environment is improved. The gradient cooling device comprises the gradient cooling plates laid on the surrounding rock surface, an air-cooling circulation mechanism for circularly introducing cold air into the gradient cooling plates and a cold air cooling mechanism for conveying cold air into the mine roadway, and each gradient cooling plate comprises two heat insulation layers and a plurality of ventilation pipes located between the two heat insulation layers. The gradient cooling device achieves all-round cooling in the mine roadway mainly through the gradient cooling plates, the air-cooling circulation mechanism and the cold air cooling mechanism, the device can insulate the heat dissipation of surrounding rock, the utilization efficiency of the cold air is improved, and the heat damage mine workingenvironment is improved.

Description

technical field [0001] The invention relates to the technical field of mine cooling, in particular to a gradient cooling method and a gradient cooling device for the surface of surrounding rock in a mine. Background technique [0002] As we all know, social progress and economic development are inseparable from the material basis provided by mine resources. With the rapid development of economy, shallow mineral resources have been gradually exhausted. Many countries, including my country, have reached the depth of deep mineral mining. More than 1,000 meters, South Africa even extended the deepest mining depth to 5,000 meters below the surface. Among the proven coal reserves, the coal reserves at a depth of 1000-2000 meters in my country account for 53.2% of the total reserves. However, with the increase of mining depth, the temperature of rock formations gradually rises, reaching tens of degrees Celsius. The average ground temperature of countries in the world The gradient is...

AI Technical Summary

Problems solved by technology

At present, methods such as grouting (slurry is heat insulation material) and spraying heat insulation layer have been used to achieve heat insulation of surrounding rocks. However, these methods can only play a role of temporary heat insulation. Under the continuous heating of surrounding rocks, heat insulation materials Its surface temperature will continue to rise, and eventually affect the ambient temperature in the shaft

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