Mining Publication: Technology News 499 - Using Propeller Fans to Improve Ventilation in Large-Entry Stone Mines
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Original creation date: December 2002
Research on propeller fans in underground drift stone mines has shown that significant ventilation improvements can be achieved. In large-entry mines that do not have any high resistance-sections (shafts> 100 ft long or shaft diameters <12 ft, propeller fans can greatly increase the total system airflow. Propeller fans can be used as either main mine fans or as freestanding auxiliary (jet) fans. NIOSH researchers have documented the performance of two recently installed propeller fans in a working limestone mine. Together the fans exhausted 750,000 cfm at a rated hp of 200. The use of the propeller fans more than doubled the air quantity while operating at 50 hp less than the original main mine fan system. In addition, the new fans, when used with effective air-coursing methods such as stoppings, reduced or eliminated recirculation near the face areas. This is because propeller fans are more efficient at lower pressures and can produce large air quantities at lower horsepower requirements than axial vane fans.
Authors: NIOSH
Technology News - December 2002
NIOSHTIC2 Number: 20022166
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Technology News 499, 2002 Dec :1-2
See Also
- A Computer Software Program that Estimates Air Quantity Requirements in Large Opening Stone Mines
- Effects of Weak Bands on Pillar Stability in Stone Mines: Field Observations and Numerical Model Assessment
- Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
- Experimental and Modeling Investigation of the Effect of Ventilation on Smoke Rollback in a Mine Entry
- Fan Selection For Large-Opening Mines: Vane-Axial Or Propeller Fans - Which To Choose?
- Pillar and Roof Span Design Guidelines for Underground Stone Mines
- Pillar Stability Issues Based on a Survey of Pillar Performance in Underground Limestone Mines
- Pillar Strength and Design Methodology for Stone Mines
- Raising the Bar of Ventilation for Large-Opening Stone Mines
- Reverse Performance Characteristics of Main Mine Fans
- Content source: National Institute for Occupational Safety and Health, Mining Program