Report of Investigations 8864: Electrical Properties and Attenuation Distance of Upepr Pennsylvanian Coal Measure Rock from Southwestern Pennsylvania

Details

• Journal Article:
  NTIS: PB84/199017
• Personal Author:
  Dehler, Andrew L. ; Lindroth, David P. ; Wingquist, Carl F.
• Description:
  The Bureau of Mines is engaged in research on ground probing radars for detection of geologic hazards in advance of mining. Penetration distances and interpretation models depend on the dielectric- properties and wave propagation characteristics for coal measure stratified media. Relative dielectric constants and dissipation factors were measured under ambient conditions for Pittsburgh seam coal measure rock over the frequency range of 20 to 100 mhz by the susceptance-variation method. The rock types measured were representative sedimentary rock located above the Pittsburgh coal seam. Extreme values for the computed attenuation distance ranged from 1.7 M at 100 mhz for siltstone to 230 m at 20 mhz for a particular limestone. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Safety
• Source:
  NTIS: PB84/199017; :1-27
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TCRC - Twin Cities Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  32 pdf pages
• NIOSHTIC Number:
  nn:10003422
• Federal Fiscal Year:
  1984
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9176406695928297a8e3beb7d26da34e0c054a4609a9b79e947696eeffd12c17ef5befc6c56b2d25cb9400b54a2897fa4edd3d03b277990b7413b62e0ab5fd9a
• Download URL:
  https://stacks.cdc.gov/view/cdc/10446/cdc_10446_DS1.pdf
• File Type:
  [PDF - 8.73 MB ]