CFD Modeling of Cloud Cover for Pollutants Dispersion in Deep Open-Pit Mines Under Arctic Air Inversion

Details

• Personal Author:
  Bandopadhyay S ; Raj KV
• Description:
  Air inversion is a meteorological phenomenon generally occurs during winter times. Release of pollutants below the inversion height in an open-pit mine during periods of weak winds and consequently weak vertical mixing may result in very high concentrations of primary and secondary pollutants, causing serious consequences for health and safety of miners. Mine operations cease if the concentration of NOx or CO exceeds the threshold limit value (TLV) of the pollutants. Artificial ventilation is required to dilute the pollutants to an extent that mine workers can safely resume work. Studies of the turbulence parameters suggest that effective ventilation of the pit and removal of pollutants can be accomplished if a large enough mixing length in the open pit can be created. Turbulent mixing by eddies of different length scales under an inversion layer is product of wind shear, thermal gradient and buoyancy. The main result of turbulence is mixing of the atmospheric profile and transport of momentum. Computational fluid dynamics (CFD) Simulation results of a novel mitigation approach using cloud cover will be presented in this paper. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Meteorology Occupational Health Safety Ventilation
• Keywords:
  Airflow Air Pollutants Open Pit Mining Seasonal Factors
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Proceedings
• Place as Subject:
  Alaska ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-8
• NIOSHTIC Number:
  nn:20069038
• Citation:
  2017 SME Annual Meeting, February 19-22, 2017, Denver, Colorado, preprint 17-020. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2017 Feb; :1-8
• Federal Fiscal Year:
  2017
• Performing Organization:
  University of Alaska Fairbanks
• Peer Reviewed:
  False
• Start Date:
  20090901
• Source Full Name:
  2017 SME Annual Meeting, February 19-22, 2017, Denver, Colorado, preprint 17-020
• End Date:
  20140831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:232387674211aac772ddf7a48571440bc21fb66ee223580ae73a8ff32c592aae2fc0d8ccb36aa551379e1e9d1422a9afd10435bf0a035395e7984f3bc0865900
• Download URL:
  https://stacks.cdc.gov/view/cdc/207588/cdc_207588_DS1.pdf
• File Type:
  [PDF - 2.49 MB ]