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Evaluate fundamental approaches to longwall dust control. Subprogram I - mining practices.
Kelly-J; Ruggieri-SK; Babbitt-CA; Wirch-S; Rajan-S
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0318097, 1990 May; :1-138
Mine operators have long known that by changing certain mining practices they can reduce personnel dust exposures. The objective of this subprogram was to identify mining practices that inherently reduce personnel exposures. This was achieved through several tasks: (1) modeling mining cycles to quantify reductions through altered practices; one key result showed the benefits of homotropal ventilation to reduce intake contamination; (2) an underground evaluation of homotropal ventilation, which revealed that intake contamination from the stageloader and crusher can be reduced by 60 to 70 pct; (3) a feasibility study of asymmetrical drums, showing that over 60 pct less cutting can be performed upstream of shearer operators during tail to head cutting; (4) laboratory studies of the headgate cutout, showing that exposures during the cutout can be reduced by over 90 pct using special water spray and ventilation curtain techniques; and (5) underground studies of downwind dust from cutting and shield movement, showing how to best position personnel to reduce exposures from these sources. The subprogram effort culminated in extensive technology transfer through two expert system computer programs, dustpro and drumpro.
Coal Mines; Longwall Mining; Dusts; Coal Miners; Coal Mining; Cutting Machines; Expert Systems; Sampling; Ventilation; Working Conditions; Dust control
CP; Final Contract Report
NTIS Accession No.
OFR 31I-90; Contract-J0318097
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0318097
Foster-Miller, Inc., Waltham, MA