在多金属地下矿山中LHD污泥处理过程中,对多源PM生成和扩散率优化的数值分析
Abdullah Rasheed Qureshi1, Sergei Sabanov2, Shahid Ali3
1Department of Mining Engineering, School of Mining and Geosciences, Nazarbayev University, Astana, Kazakhstan. abdullah.qureshi@nu.edu.kz.
概括
地下矿山中的颗粒物 (PM) 在载荷运输倾倒 (LHD) 操作期间对健康构成风险. 这项研究揭示了PM暴露水平因倾销方法而异,为改善通风和安全提供了见解.
科学领域:
- 环境科学 环境科学
- 职业健康 职业健康 职业健康
- 采矿工程 采矿工程 采矿工程
背景情况:
- 地下矿山中的颗粒物 (PM) 污染对健康和环境构成重大风险.
- 载荷运输倾倒 (LHD) 操作是产生和扩散微粒的主要来源.
- 有限的研究存在于PM来源和在多金属矿山中LHD污泥处理期间的传播.
研究的目的:
- 调查在地下多金属矿山中LHD操作期间的PM生成和扩散.
- 在三种不同的LHD操作条件下评估PM暴露.
- 确定最佳的通风策略,以减轻矿工的PM暴露.
主要方法:
- 使用Ansys-Fluent进行实地实验和数值模拟.
- 在三种LHD操作条件下分析PM传播:面装载,临时倾倒场倾倒和地下矿山卡车 (UMT) 倾倒.
- 在不同的体积空气流下,对粒子扩散速率的回归分析.
主要成果:
- 确定了复杂的空气流模式,包括反流和旋区域.
- 在临时倾倒场内倾倒 (条件2) 导致LHD运营商的PM度最高.
- 条件3 (对UMT的倾销) 导致UMT运营商的PM暴露率高于LHD运营商.
结论:
- 在LHD操作期间,PM暴露水平取决于条件.
- 可以确定最佳体积空气流量,以减轻矿工的PM暴露.
- 这些发现支持优化采矿时间表和制定有针对性的PM减轻策略.
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