Report of Investigations 9332: Evaluation of Ultrasonic Measurement Systems for Bolt Load Determinations

Details

• Journal Article:
  MISSING
• Personal Author:
  Tadolini, Stephen C.
• Description:
  The U.S. Bureau of Mines has developed ultrasonic measurement instrumentation capable of measuring strains and elongations on tensioned and untensioned mine roof bolting systems. This report evaluates the pulsed-phase-lock-loop and pulse-echo systems. The pulse-echo systems measure time of flight of a signal through the bolt. The ultrasonic instrument converts the measurement into elongations or stress. The most recent Bureau instrument development converts travel-time measurements directly into elongation, load, stress, and torque by simple data manipulation from the keyboard. Bolt preparation and instrument calibration are described in detail. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Source:
  MISSING :9 pages
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  United States
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  15 pdf pages
• NIOSHTIC Number:
  nn:10008433
• Federal Fiscal Year:
  1990
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:57e790c3e37331205edb89e0559bddaefa1162b61d4eea6fe35cc099ef6e71fbdbf0529ee645e724ba9992ac38124e716e266ff36bad30ab06328fb23c00d5b6
• Download URL:
  https://stacks.cdc.gov/view/cdc/10476/cdc_10476_DS1.pdf
• File Type:
  [PDF - 5.38 MB ]