Report of Investigations 9270: Evaluation of Water-Jet-Assisted Cutting Capability of Longwall Shearers

Details

• Journal Article:
  MISSING
• Personal Author:
  Kovscek, Paul D. ; Taylor, Charles D. ; Thimons, Edward D.
• Description:
  The U.S. Bureau of Mines evaluated water-jet-assisted longwall shearers in full-scale laboratory tests and underground. Both test programs showed that use of high-pressure water did little to reduce the shearer motor energy required to maintain a given cutting rate. However, three other major benefits were achieved with the use of water-jet-assisted cutting. At 1,800 psi, respirable dust levels were reduced about 80 pct compared with the dust levels of the conventional water spray system operating at 340 psi. Operating at higher pressures required for water-jet assist also resulted in an increase in the average size of coal cut, which translates into a decrease in product fines. Finally, although no controlled measurements of bit wear as a function of water pressure were made, mine personnel reported that the shearer bits lasted longer when water-jet-assisted cutting was used. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Source:
  MISSING :14 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:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  20 pdf pages
• NIOSHTIC Number:
  nn:10007250
• Federal Fiscal Year:
  1989
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7348570657c3720dab361bbcfdf46c2519554c06ad5925dd1ef47ffbf0f786cd50a556bf3603e3eeb5c72097a10e96b3075f6366121a28eb785fa88749f91506
• Download URL:
  https://stacks.cdc.gov/view/cdc/10477/cdc_10477_DS1.pdf
• File Type:
  [PDF - 6.40 MB ]