Wave pattern effect on the lifting of near-ground dust driven by shock waves after tunnel blasting
Wave pattern effect on the lifting of near-ground dust driven by shock waves after tunnel blasting
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DOI：
10.1016/j.powtec.2023.118935
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发表时间：
2023-08
影响因子：
5.2
通讯作者：
Jing Hu;Angui Li;Hai-hang Cui;Shuaishuai Zhang;Li Chen;Jinnan Guo
中科院分区：
文献类型：
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作者：
Jing Hu;Angui Li;Hai-hang Cui;Shuaishuai Zhang;Li Chen;Jinnan Guo
隧道爆破扬尘的关键力学问题是冲击波与颗粒相的相互作用。基于可压缩流动数值模拟，建立了气固两相流模型，模拟了两种典型波型下的粉尘扬升特性。结果表明，两种波型在扬尘过程中都经历了“滚动”+“扬尘”的过程。不同之处在于，球面波情况下粉尘层先受压后抬升，而平面波情况下粉尘立即斜向上抬升。在后一种情况下，粉尘提升高度和速度更高。本文通过对一系列粉尘物性参数和冲击波压力参数下冲击波扬尘及波型效应的研究，为通风除尘设计提供理论指导。
The key mechanical problem of dust lifting due to tunnel blasting is the interaction between shock waves and particle phases. Based on compressible flow numerical simulations, a gas–solid two-phase flow model was established to simulate the dust lifting characteristics under two typical wave patterns. The results show that both wave patterns undergo “rolling” + “lifting” during the dust lifting process. The difference is that the dust layer is first pressed and then lifted in the case of spherical waves, while the dust is immediately lifted diagonally upward in the case of plane waves. In the latter case, the dust lifting height and speed are higher. In this paper, theoretical guidance for ventilation and dust removal designs was provided based on the study of dust lifting by shock waves and wave pattern effect under a series of dust physical property parameters and shock wave pressure parameters.