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Suppression of longwall respirable dust using conventional water sprays inoculated with surfactants and polymers
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  • Description:
    "The U.S. Bureau of Mines is evaluating water spray additives for the purpose of improving respirable dust control during coal mining operations with particular emphasis on the longwall shearer. Recent field tests of combined surfactant-polymer reagents at two production longwall operations have shown favorable respirable dust reductions compared with water sprays containing no additive. Gravimetric dust samples obtained downwind of the shearer while following or preceding the machine showed corrected dust reductions in the range of about 40 - 60 percent for some of the reagent formulations as compared to water alone. Experimental evidence indicates that dust captured by reagent-treated sprays at the shearer can be re-emitted in the headgate area if stageloader-crusher sprays and other dust controls are inadequate." - NIOSHTIC-2

    NIOSH no. 20039377

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