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再循环流对深空矿井喷尘分散模式的影响

Zheng Chen^1,2,3, Cuifeng Du^1,2,3, Jiuzhu Wang^1,2,3

¹College of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China.

|September 4, 2023

概括

在深层露天矿井的循环使得尘埃聚集在上风的山坡上. 了解到再循环中心点 (D_recir) 的距离有助于预测和控制尘埃扩散模式,以提高空气质量.

科学领域:

环境科学环境科学
采矿工程采矿工程采矿工程
大气科学大气科学

背景情况:

在深层露天矿井中的循环流严重降低了大气环境.
再循环影响尘埃云分散模式的机制尚不清楚.
喷气作业造成的尘埃污染是深层露天矿山的一个主要问题.

研究的目的:

为了研究爆炸尘埃云在深空矿井中的分散模式.
为了阐明循环流对尘埃分散的影响.
分析自然风速,风向和爆炸位置对尘埃扩散的影响.

主要方法:

进行了一项实验,以验证上风坡上的循环流和尘埃聚合.
使用现场测量数据进行了数值模拟分析.
研究了不同自然风速 (v),自然风向 (α) 和爆炸位置 (d) 对尘埃扩散的影响.

主要成果:

自然风速,方向和爆炸位置影响到循环回收中心点 (D_recir) 的距离.
较小的D_recir值导致在上风斜坡上积聚灰尘,造成广泛的污染.
较大的D_recir值导致尘埃向下风扩散,减少矿井中的污染.

结论:

为了预测尘埃扩散,建立了一个方程 (D_recir = -120.61v2 + 237.27v + 0.82d - 0.07α2 - 6.75α + 151.08).
这些发现为预测深层露天矿山爆炸尘埃扩散模式提供了基础.
这项研究为在这样的环境中制定有效的防尘策略提供了洞察力.

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