A comparison of borer, ripper, and conventional mining products in Illinois no. 6 seam coal.

Details

• Personal Author:
  Engelmann, William H. ; Fumanti RR ; Schmidt, Robert L.
• Description:
  The methane control and the respirable dust groups at the Twin Cities Mining Research Center (TCMRC) cooperated recently in obtaining production samples of approximately 1 ton each, from the loading conveyors of a ripper, a borer, and a loading machine in conventional development headings. These samples were sized, in four stages, from plus 4 in to minus 10 um. The conventional product had the least fines of the three production methods. The borer product had more fines than did the ripper product, but it also had a greater amount of large pieces. All three products, as sampled, had essentially the same amount of minus 10-um particles. Photomicrographs and surface-area comparisons were made. Gas- adsorption, surface-area determinations on particles under 37 um give essentially the same value. Surface-area calculations, assuming spherical particles and no porosity, give a smaller area to the conventional product. [Description provided by NIOSH]
• Content Notes:
  in NTRL, no pdf
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• Place as Subject:
  Illinois ; OSHA Region 5
• 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:
  1-18
• NIOSHTIC Number:
  nn:10001737
• NTIS Accession Number:
  PB213952
• Citation:
  NTIS: PB 213 952; :1-18
• Federal Fiscal Year:
  1972
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 213 952
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/236639/cdc_236639_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]