Report of Investigations 9479: Effect of Ultralow Frequency Signaling on Blasting Array Current

Details

• Journal Article:
  Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9479
• Personal Author:
  Griffin, Russell E. ; Hjelmstad, Kenneth E.
• Description:
  The U.S. Bureau of Mines (USBM) has developed an electromagnetic (EM) fire warning alarm system for underground mines. The system generates a magnetic field for through-the-earth signal transmission to microreceivers carried by individual miners. EM fields can induce electric currents in metallic conductors; if an EM transmitting antenna and an electric blasting cap array are too close, the field could induce a current in the blasting array and cause zn unintentional initiation of the electric detonators. The USBM conducted tests that define the safe and unsafe regions for using electric detonators near the transmitting antenna of the warning alarm system. [Description provided by NIOSH]
• Subjects:
  Explosions Mining Occupational Health Radiation Safety
• Keywords:
  Electromagnetic-radiation; Antenna-arrays; Human-factors-engineering; Safety-engineering; Ignition; Explosions; Blasting; Caps-explosives; Detonators; Electric-ignition; Mine-fires; Underground-mining; Warning-systems
• Source:
  Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9479, 1993 Jan; :1-11
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  Minnesota ; OSHA Region 5
• 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:
  13 pdf pages
• NIOSHTIC Number:
  nn:10004318
• NTIS Accession Number:
  PB94-112414
• Federal Fiscal Year:
  1993
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:17726aff748fff9a5a38df6cbf39fd46090ca0e180b7160b1613a0d260db720531bb263478a24d0b0fbdda24cbfb3d0da0ad92cc75dd61706f5ff1185f9fbc2f
• Download URL:
  https://stacks.cdc.gov/view/cdc/10106/cdc_10106_DS1.pdf
• File Type:
  [PDF - 317.22 KB ]