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在考虑了支洞和主变洞影响的情况下,以某水电站地下主厂房四层施工通风为例,对主厂房施工通风的风流组织和污染物扩散过程进行了模拟研究。结果表明:由工作面至出口,速度逐渐减小,主厂房内大部分区域速度小于0.15m/s,X-Y剖面处存在涡流区;在主厂房内出口处存在一个高浓度区,且主厂房内的CO和粉尘分布趋势相似,并以Nakayama等的矿井通风甲烷浓度分布实验结果进行了验证,模拟结果与实验基本吻合。
Considering the influence of branch hole and main deformation tunnel, taking the four-floor construction ventilation of the underground main building of a hydropower station as an example, the air flow organization and the diffusion process of pollutants in the main plant building ventilation are simulated. The results show that the velocity decreases gradually from the working face to the exit, the velocity in most of the main buildings is less than 0.15m / s, and the eddy current region exists in the XY profile. There is a high concentration area at the exit of the main workshop, The trends of CO and dust distribution are similar, and the experimental results of methane concentration distribution in mine ventilation of Nakayama et al. Are validated. The simulation results are in good agreement with the experiments.