Tunnel Boring Technology. Disk Cutter Experiments in Sedimentary and Metamorphic Rocks

Details

• Personal Author:
  Bruce WE ; Larson, David A. ; Morrell, Roger J.
• Description:
  Disk-cutter experiments were performed on five rock types ranging in compressive strength from 9,000 psi to 27,000 psi. A specially constructed testing machine called a linear-cutter apparatus (lca) was designed to load and traverse a free-rolling disk cutter across a sawed rock surface. The lca was instrumented to measure the vertical and horizontal forces acting on the cutter during the run. The ability of disk cutters to fragment rock was determined for both 60-degree and 90-degree cutting-edge angles, and relationships and regression equations were developed to predict cutter performance based on rock physical properties and applied forces. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• 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:
  1-32
• NIOSHTIC Number:
  nn:10001725
• NTIS Accession Number:
  PB-193982
• Citation:
  NTIS: PB 193 982; :1-32
• Federal Fiscal Year:
  1970
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 193 982
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:461aca6d4c7b62a3b17dbb24a2818a4e79a23bec20ced518b8e1359889732107830cef2e3a2a58dc9a0869daae970e9d8398ff3e52ab1a1123b271aee7498823
• Download URL:
  https://stacks.cdc.gov/view/cdc/237333/cdc_237333_DS1.pdf
• File Type:
  [PDF - 12.84 MB ]