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Evaluation of the wet head continuous miner to reduce respirable dust

机译：评估湿头连续采矿机以减少可吸入粉尘

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The National Institute for Occupational Safety and Health (NIOSH) conducted field tests to evaluate the effectiveness of a wet head continuous mining machine for reducing dust exposure for continuous miner operators. Wet head technology delivers water via sprays to the continuous miner's cutter head as opposed to traditional standard sprays located on the boom and body of the mining machine. The sprays, positioned directly behind each bit on the cutterhead, deliver water at the point of attack, serving to cool the bits during mining to reduce the potential for frictional ignitions. The sprays also flood the coal with water to potentially suppress dust generation. Dust surveys were conducted at several mines to evaluate the wet head's effectiveness to control respirable dust exposure at the continuous miner operator location and in the immediate return. Results show that the wet head miner generally improved air quality at both sampling locations to varying degrees in some, but not all, mines when compared to a continuous miner with a standard spray system.
机译：美国国家职业安全与健康研究所（NIOSH）进行了现场测试，以评估湿式连续采矿机减少连续采矿者操作员粉尘暴露的有效性。湿头技术通过喷水将水输送到连续采矿机的刀头，这与采矿机的动臂和主体上的传统标准喷水相反。喷雾器位于刀盘上每个钻头的正后方，可在侵蚀点输送水，从而在采矿过程中冷却钻头，以减少产生摩擦着火的可能性。喷雾还会使煤充满水，从而潜在地抑制粉尘的产生。在几座矿山进行了粉尘调查，以评估湿头在连续的采矿工人位置和立即返回时控制可吸入粉尘暴露的有效性。结果表明，与带有标准喷雾系统的连续采煤机相比，湿式采煤机通常在某些（但不是全部）矿井中的两个采样位置均改善了空气质量。

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