煤矿安全2025，Vol.56Issue(11)：28-37,10.DOI:10.13347/j.cnki.mkaq.20241153
露天矿双尘源粉尘分布特征数值模拟
Numerical simulation of dust distribution characteristics of double dust sources in open-pit mine
摘要
Abstract
To investigate the impact of various operations in open-pit coal mines on dust pollution,Zhonglian Runshi Xinjiang Open-pit Mine was selected as the engineering background.Field measurements of dust concentration under the influence of dual dust sources were conducted,and the dust generation mechanism of open-pit coal mines was analyzed.By establishing a mathematical model for dust diffusion from dual sources in open-pit mines and using SolidWorks software to construct a proportional geometric model,the distribution characteristics of coupled dust source migration were further studied.The results indicate that during truck loading and transportation,large particles of dust settle rapidly due to centrifugal force and gravity while particles smaller than 5 μm are difficult to settle.Simulation results show that within 0 to 50 seconds,the dust mass concentration mainly changes around the dust generation area.From 50 to 150 seconds,the dust moves along the airflow direction and forms a vortex.After 150 seconds,some of dust settles or escapes;within 200 seconds,the dust diffusion distance increases with the increase of the time.The dust mass concentration is the highest at the center of the dust source and gradually decreases as the diffusion distance increases.In the case of dual dust sources,the dust mass concentration is the sum of the dust mass concentrations of different dust-generating area dust sources and each virtual source,moreover,large particles are prone to settle.关键词
露天煤矿/双尘源/产尘机理/粉尘扩散/粉尘治理/粉尘污染Key words
open-pit coal mine/double dust sources/dust generation mechanism/dust diffusion/dust treatment/dust pollution分类
矿山工程引用本文复制引用
陶学伟,谢国良,韩铁良,蒋仲安,杨向东..露天矿双尘源粉尘分布特征数值模拟[J].煤矿安全,2025,56(11):28-37,10.基金项目
国家自然科学基金资助项目(51874016) （51874016）
