Report of Investigations 8085: Impact and Thermal Sensitivity of Commercial Detonators

Details

• Personal Author:
  Becker, Karl R. ; Cooper, John C. ; Watson, Richard W.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  A variety of commercial detonators (fuse type and electric instantaneous and delay types) were subjected to impact and thermal stimuli to determine initiation stimulus levels and the dominant parameters in resistance to initiation. In the impact trials, the detonators were impacted along their length to find the most sensitive region; threshold initiation limits obtained for these regions ranged from 3.47 to 20.82 Joules (2.6 to 15.4 Ft-lb). The friction sensitivity of the explosive component was an important parameter in determining sensitivity; various construction features of nonexplosive components played a role as well. In the thermal sensitivity trials, the detonators were heated from ambient to 100 deg c at an average rate of about 1.0 Deg c/min. and thereafter at 0.5 Deg c/min until they exploded; the explosion temperatures observed ranged from 121 deg to 188 deg c. These temperatures correlated quite well with the reaction temperatures of certain characteristic explosive components used by different manufacturers. The data also indicated an effect of confinement on explosion temperatures of detonators. [Description provided by NIOSH]
• Subjects:
  Explosions Mining Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  22 pdf pages
• Contributor:
  Brandis, John ; Guastini, Elva
• NIOSHTIC Number:
  nn:10001654
• NTIS Accession Number:
  PB-249879
• Citation:
  NTIS: PB 249 879; :1-17
• Federal Fiscal Year:
  1975
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 249 879
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a940616a8e94a3c84e32818185b61a998387a13415ab0f27d64f77330b89b5b57e4785f0fd57b54dc457c16f8c120e0a621acd969e63d304d2a37ef3612da3ff
• Download URL:
  https://stacks.cdc.gov/view/cdc/201721/cdc_201721_DS1.pdf
• File Type:
  [PDF - 925.70 KB ]