关键词: 高温矿井, 冰块辅助降温, 数值模拟, 掘进工作面

Abstract: Ice blocks are often used as an auxiliary cooling method due to their advantages such as economy and easy accessibility. To improve the effect of thermal hazard control in the high-temperature tun⁃ neling face of the mine and reduce the cost of thermal hazard control，taking a certain section of the high�temperature tunneling face as the object，ice block assisted cooling was carried out on the basis of ventila⁃ tion and cooling. The effect of ice block assisted cooling was analyzed and the design parameters were deter⁃ mined. The research is based on the theory of solidification and melting，combined with the SST k-w turbu⁃ lence model，and uses fluent software to simulate the variation law of the temperature field in the high-tem⁃ perature tunneling face under ventilation and ice block cooling. By controlling the number and arrangement of ice blocks，and comparing and analyzing the changes in the temperature field of the tunneling face under different working conditions，the ice block cooling scheme with the best cooling effect is obtained. Tests have proved that compared with the separate ventilation scheme，the temperature within a 3 m range of ice blocks drops significantly，by 7~8℃ compared with when no ice blocks are arranged. When 1 m³ ice blocks were arranged on each side，the minimum temperature within 5 m of the working surface was 23.6 ℃，which decreased by about 10 ℃ compared with when no ice blocks were arranged. When the ice block volume is se⁃ lected at the same 1 m³ and the distance from the tunneling face is 10 m，the temperature distribution is uni⁃ form，mostly between 24 and 25 ℃，and the cooling effect is better. Under the condition of the same amount of ice cubes，after 1 h，the change in air temperature in the roadway has no significant relationship with the shape and arrangement of ice blocks.

Key words: high-temperature mine, ice block assisted cooling, numerical simulation, excavation working face