Effect of operational parameters of spraying on dust suppression rate in roadways

Air-borne coal dust is a serious threat to both coal mine personnel and equipment. There is a variety of air dust reduction activities (liquid spraying, air filtering, oil/water/grill/paper trapping of dust, centrifugal dust collection or use of dust-catching chambers), but they are not always effective, especially in solving specific tasks (short-time dust removal). A possible solution to this end can be the pulse ventilation, which is used to remove methane from mine air, in combination with liquid spraying. This article describes the lab-scale tests of dust suppression by spraying. Coal mines use liquid spraying, and this approach is therefore tested on a laboratory scale. The deposition time of water aerosol is determined. For estimating efficiency of dust suppression and to control water aerosol concentrations, the time functions of average concentrations of dust/water and water aerosols are obtained and described by formulas.

Kurnosov I. Y. Effect of operational parameters of spraying on dust suppression rate in roadways. MIAB. Mining Inf. Anal. Bull. 2023;(3):150-162. [In Russ]. DOI: 10.25018/0236_1493_2023_3_0_150.

I.Y. Kurnosov, Graduate Student, Assistant, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: kurnosovilya@yandex.ru, ORCID ID: 0000-0002-7618-6839.

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