关键词: 有毒有害气体, 迁移规律, 大涡模拟, 地下洞室施工, 抽蓄电站

Abstract: At present, blasting is the main excavation method in the construction of underground tunnels of building pumped storage stations. The toxic and harmful gases produced by blasting has great impact on the construction environment. Based on the large eddy simulation (LES), taking the Jinzhai pumped storage power station in Anhui Province as a case, a numerical model for air flow and transport of different gas components in underground powerhouse was established in this paper. The reliability of the numerical model was verified by the measured data, and the law of gas concentration migration was obtained. On this basis, the migration laws of toxic and harmful gases under different ventilation conditions and mining depths were further simulated, and the gas residence time was predicted. This study is of guiding significance for ventilation design and safety construction of underground tunnels in pumped storage power station.

Key words: toxic and harmful gas；migration rule；large eddy simulation；underground cavern construction, pumped storage power station