Report of Investigations 9388: Time Effects on a Resin-Grouted Bolt Anchorage Characteristics

Details

• Journal Article:
  MISSING
• Personal Author:
  Stateham, Raymond M. ; Wuest, William J.
• Description:
  The technical analysis of parameters that can influence roof and rib reinforcement is important to the operation of safe and profitable underground mines. One such parameter, studies in this U.S. Bureau of Mines investigation, is the effect of time on untensioned, resin-grouted bolt anchorage characteristics. Seventy-three 4-ft-long bolts with three different grout column lengths were installed in a stable coal mine roof. The bolts were then subjected to standardized pull tests at various intervals throughout a 37-month period. For each test, load-deformation data were reduced to determine axial stiffness and yield point. The magnitudes of these two anchorage characteristics at the time of installation were compared with results from subsequent pull tests to determine if anchorage capacity deteriorated. Bolts with 18-in grout columns were studied over 9 months, and no measurable loss occurred. Bolts with 48- and 24-in grout columns were studied over 37 months and also exhibited no measurable loss. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Mining industry; Roof bolts; Underground mining; Safety research; Safety engineering; Environmental control equipment; Environmental engineering; Coal mines; Equipment reliability; Equipment testing; Anchoring
• Source:
  MISSING 1991; :1-11
• 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:
  17 pdf pages
• NIOSHTIC Number:
  nn:10010991
• Federal Fiscal Year:
  1991
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:97256e5e451e8a5c2885ea498d4fda245700578d66d839b5bde4844f4a6aa5ce39c7e89b2df1c4c3e09563da267cabc242204bf827be449c40c6df386e0b422f
• Download URL:
  https://stacks.cdc.gov/view/cdc/10264/cdc_10264_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]