Portable Bore-Hole Shear Strength Tester for Coal

Details

• Personal Author:
  Ferguson EG ; Handy RL ; Klockow DE
• Description:
  The objective of this research was to devise and test an apparatus to rapidly evaluate the cohesive and frictional strength of coal in situ, in order to increase the safety and percentage of coal recovery from underground coal mines. Since it is extremely difficult to obtain large samples of coal for laboratory testing, the borehole shear tester promises to be of significant value to mining engineers and researchers in determining the physical properties of coal and related strata. Such physical properties are essential to the use of finite-element analyses or other techniques of mine design. During the first year, a device was designed utilizing the borehole shear test principle from soil shear strength testing. The opposing corrugated plates were forced outward to exert a controlled contact pressure against the sides of a previously bored hole, and then the plates were slowly pulled along the axis of the hole to cause shearing of coal in contact with the plates. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Genre:
  Conference Publications ; Final Contract Report
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRC - Denver Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-82
• NIOSHTIC Number:
  nn:10000922
• NTIS Accession Number:
  PB-221352
• Citation:
  NTIS: PB/221-352 Available for Reference At Bureau Libraries; :1-82
• Federal Fiscal Year:
  1973
• Performing Organization:
  Iowa State University
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB/221-352; Available for Reference At Bureau Libraries
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0ba15e1060f3b7aa9cf1a07cac93e724d79ec3fb04b752692e881856f41293596cf1c16dee7f7b975923d48ed4bd6a6916da2d73b6aa3e6dda7a890c410f03db
• Download URL:
  https://stacks.cdc.gov/view/cdc/235224/cdc_235224_DS1.pdf
• File Type:
  [PDF - 20.51 MB ]