Booster fan applications for sections in longwall and room-and pillar mining.
Pritchard-CJ; Martikainen-A; Wala-A; Frey-G; Goodman-G
Proceedings of the 14th United States/North American Mine Ventilation Symposium, June 17-20, 2012, Salt Lake City, Utah. Calizaya F, Nelson M, eds. Salt Lake City, UT: University of Utah, 2012 Jun; :449-458
Booster fan use in coal mines is prohibited in the United States (US) due to regulations, recirculation issues, and other concerns. Further research into booster fan use as a method to improve coal mine ventilation was suggested by the Final Report of the Technical Study Panel on the Utilization of Belt Air and the Composition and Fire Retardant Properties of Belt Materials in Underground Coal Mining, undertaken in response to the MINER Act of 2006. Accordingly, NIOSH researchers examined booster fan use by modeling short and extended development headings, supplemented with field tests in a small research coal mine and a large trona mine. Example coal mine ventilation systems were modeled for various booster fan locations and the effects of booster fans on face and total mine ventilation. An extended longwall development network was modeled for the effects of single and multiple booster fans on system efficiency, leakage, recirculation, and flow reversal. In field testing, a booster fan was installed in the Bruceton Experimental Mine, Bruceton, PA, in outby and inby locations with leakage effects and airflow reversal examined. A booster fan was also installed in a longwall trona mine, and its effect on the mining district ventilation circuit was modeled and monitored. Results showed that when located, sized, and operated correctly, booster fans may be an effective tool to increase airflow in underground coal mines after a thorough examination of each mine's individual issues. Studies of short and extended coal mine development systems in conjunction with small and large in-mine tests show that booster fans can be used to increase face airflow, that outby booster locations minimize recirculation, and that multiple booster fan installations may be used to balance leakage and recirculation effects. Improved technology in ventilation network modeling, monitoring, and control of ventilation systems will reduce the potential risk in underground coal mine booster fan applications.
Mining-industry; Longwall-mining; Coal-mining; Ventilation; Ventilation-equipment; Underground-mining; Air-flow; Models; Monitoring-systems; Room-and-pillar-mining
Proceedings of the 14th United States/North American Mine Ventilation Symposium, June 17-20, 2012, Salt Lake City, Utah