Methane Emissions and Airflow Patterns Along Longwall Faces and Through Bleeder Ventilation Systems

Details

• Personal Author:
  Dougherty, Heather N. ; Krog, Robert B. ; Schatzel, Steven J.
• Description:
  The National Institute for Occupational Safety and Health (NIOSH) conducted an investigation of longwall face and bleeder ventilation systems using tracer gas experiments and computer network ventilation. The condition of gateroad entries, along with the caved material's permeability and porosity changes as the longwall face advances, determine the resistance of the airflow pathways within the longwall's worked-out area of the bleeder system. A series of field evaluations were conducted on a four-panel longwall district. Tracer gas was released at the mouth of the longwall section or on the longwall face and sampled at various locations in the gateroads inby the shield line. Measurements of arrival times and concentrations defined airflow/gas movements for the active/completed panels and the bleeder system, providing real field data to delineate these pathways. Results showed a sustained ability of the bleeder system to ventilate the longwall tailgate corner as the panels retreated. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Explosions Mining Occupational Health Safety Ventilation
• Keywords:
  Air-flow Air-monitoring Author Keywords: Longwall Coal Mining Bleederless Systems Bleeder Systems Coal-gas Coal-mining Equipment-design Explosions Gas-indicators Longwall-mining Methane Methane-control Methanes Mining-industry National Institute For Occupational Safety And Health NIOSH Sampling SF6 Tracer Gas Underground-mining Ventilation-equipment Ventilation-systems Ventilation Modelling

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• Series:
  Mining Publications
• ISSN:
  1754-890X
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  328-349
• Volume:
  5
• Issue:
  4
• NIOSHTIC Number:
  nn:20045701
• Citation:
  Int J Min Miner Eng 2014 Oct-Dec; 5(4):328-349
• Contact Point Address:
  Robert B. Krog, NIOSH, Office of Mine Safety and Health Research, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA
• Email:
  robertkrog8@gmail.com
• CAS Registry Number:
  Methane (CAS RN 74-82-8)
• Federal Fiscal Year:
  2015
• Peer Reviewed:
  True
• Source Full Name:
  International Journal of Mining and Mineral Engineering
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ae1832e9276387478574b4d8cc412595952677e6150be241f9e718bab078d23648ec22a7639559bb3399c57702f0c3b7fc6bca4eae311ff3fd62c8a67b006e4c
• Download URL:
  https://stacks.cdc.gov/view/cdc/228108/cdc_228108_DS1.pdf
• File Type:
  [PDF - 3.23 MB ]