在完全机械化的采矿过程中,煤石粉尘混合物在工作环境中的悬浮特性
Fan Geng1, Jiajun An2, Yingchao Wang3
1School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou, 221116, China. gengfan0104@163.com.
Environmental science and pollution research international
|September 4, 2023
概括
这项研究使用数值方法研究了采矿中的煤石英粉扩散. 研究结果显示PM10尘埃的特性和尺寸分布,为预防病和煤炭工人等肺部疾病提供了指导.
科学领域:
- 职业健康 职业健康 职业健康
- 环境科学 环境科学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 采矿活动会产生灰尘,带来肺部疾病的风险,如煤炭工人肺炎 (CWP) 和病.
- 石英尘埃是与这些严重呼吸道疾病有关的主要成分.
- 了解混合灰尘的行为对于有效的工作场所安全至关重要.
研究的目的:
- 为了研究煤石灰尘混合物的扩散特性.
- 分析颗粒大小和成分对尘埃悬浮物的影响.
- 为减轻地下煤矿中混合灰尘暴露提供理论指导.
主要方法:
- 采用多种数值技术:计算流体动力学和离散元素方法 (CFD-DEM),硬球模型和直接蒙特卡洛模拟 (DSMC).
- 已验证的数值方法,以确保模拟尘埃扩散过程的准确性.
- 基于经过验证的模型,分析了聚分散混合尘的悬浮特性.
主要成果:
- PM10尘埃表现出快速反应,广泛的扩散范围和易受反流的影响.
- 颗粒大小分布显示了从矿井的顶部到底部的逐渐增加.
- 在低空速时,煤灰约占呼吸区混合物的50%.
结论:
- 该研究为分析混合尘埃动态提供了经过验证的数值框架.
- 详细了解PM10的行为和粒子大小分层.
- 结果为地下采矿环境中全面的防尘策略提供了必要的理论支持.
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