Airborne dust pollution due to mechanised scaling in underground metalliferous mine cross-cut drive under buoyancy-driven airflow

IF 1.8 Q3 MINING & MINERAL PROCESSING

Mining Technology-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2022-12-28 DOI:10.1080/25726668.2022.2159301

B. Paluchamy, D. P. Mishra

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Abstract

ABSTRACT Nowadays, mechanised scaling is extensively used in fully mechanised underground metalliferous mines (FMUMM) for removing potentially dangerous loose rocks from the mine roof and side walls. This study measures and analyses the generation and dispersion of airborne dust due to mechanised scaling operation by scaler in cross-cut (X-cut) drive of an underground mine using real-time aerosol spectrometers. The airborne dust is analysed in terms of the concentration of various size particles in total airborne dust (TAD). The analyses of different dust sizes, viz. ≤20 μm, ≤15 μm, ≤10 μm, ≤5 μm and ≤1 μm revealed that the per cent proportion of ≤1 μm and ≤10 μm varies from 2.6 to 22.4% and 60.5 to 88.3%, respectively, in the cross-cut. Moreover, the concentration proportions of alveolic and thoracic dusts in TAD during the 20-min retention time are assessed. This study can aid in developing safe re-entry periods and efficient dust control appliances.

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浮力驱动气流作用下地下金属矿山横切巷道机械结垢对空气粉尘的污染

摘要:目前，综采地下金属矿山(FMUMM)广泛采用机械化结垢技术，以清除矿山顶板和侧壁上存在潜在危险的松散岩石。本研究利用实时气溶胶光谱仪测量和分析了某地下矿山横切驱动中，因刮刮机机械化刮刮作业而产生的空气粉尘的产生和扩散。根据空气粉尘中不同粒径颗粒的浓度对空气粉尘进行了分析。对不同粉尘粒径(≤20 μm、≤15 μm、≤10 μm、≤5 μm和≤1 μm)的分析表明，≤1 μm和≤10 μm在断面中的占比分别为2.6% ~ 22.4%和60.5% ~ 88.3%。此外，我们还评估了在20分钟的滞留时间内，TAD中肺泡和胸部粉尘的浓度比例。这项研究有助于开发安全的再入期和有效的粉尘控制设备。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mining Technology-Transactions of the Institutions of Mining and Metallurgy MINING & MINERAL PROCESSING-

CiteScore

2.20

自引率

9.10%

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