Phase change cooling research method of filling body in high-temperature deep well

Abstract

The invention discloses a phase change cooling research method of a filling body in a high-temperature deep well. The phase change cooling research method comprises four stages of screening the best particle size gradation of pipeline transportation slurry through a particle size proportioning test; performing theoretical analysis, model establishment and calculation through computational fluid mechanics, particle dynamics, a two-phase flow theory and the like, and establishing a heterogeneity isothermal flow resistance model of ice containing filling slurry, which is suitable for an engineering design stage; researching the influence of external environment on a solid flow conversion process, and performing cold carrying capability calculation and cooling efficiency test research; modeling and calculating multi-field coupling of phase change slurry by utilizing numerical simulation software, and researching space-time evolution regularities and a non-linear model of a phase change process of the phase change slurry. According to the phase change cooling method, a complete theoretical system of an action mechanism of the phase change cooling filling body in the high-temperature deep well can be formed, obtained test results and formed theories can be directly applied to deep mining, and the problems of difficulties in transportation of the filling slurry of the deep well, mine cooling and the like are solved.

Description

Technical field [0001] The invention relates to a theory and method of materials science, bulk medium mechanics, mesomechanics, fluid mechanics, heat transfer, rheology, particle flow numerical simulation, etc., in particular to a phase change cooling of a high temperature deep downhole filling body research method. Background technique [0002] With the gradual reduction and exhaustion of shallow resources, the mining depth is increasing. At present, the mines facing deep mining in China account for 90% of the total number of mines in the country; deep mining is faced with many problems such as high ground stress, high ground temperature, and high osmotic pressure, leading to mining Increasing difficulty, deteriorating operating environment, cooling ventilation, and sharp increase in production costs have posed severe challenges for deep resource mining; in order to achieve safe production, the application of filling technology is essential for deep resource development, and fil...

AI Technical Summary

Problems solved by technology

The cold source (ice flakes or cold water, etc.) is produced by the refrigeration station 1, and is transported to the air cooler 5 of the mining face through the special cold port frozen water pipe 3, and exchanges heat with the hot and humid air of the working face, thereby reducing the ambient temperature of the working face , humidity, the cooling water after heat exchange will condense heat out of the working surface (such as the ground, etc.); the cooling system has many disadvantages: the system is complex, the total installed power is large, and the energy consumption is high; the cooling pipeline is long, and the cooling capacity of the system is lost The production process of fluidized ice needs to add salt, which has a corrosive effect on the cooling pipeline and equipment; it is necessary to install a large-diameter cooling pipeline in the wellbore and insulate the pipeline; the ground refrigeration workshop occupies a large area, etc.

[0004] The two major problems that deep mine mining will face in the future are empty space filling and mine cooling. At present, the paste filling technology is not perfect, and there are many problems in the slurry transportation, and it is difficult to form a stable structural flow; the mine cooling system is complicated. , high operating cost, low cooling efficiency

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