Welcome to CDC Stacks | Evaluation of Water-Jet-Assisted Cutting Capability on Longwall Shearers - 10477 | National Institute for Occupational Safety and Health
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
Evaluation of Water-Jet-Assisted Cutting Capability on Longwall Shearers
  • Published Date:
    1/1/1989
Filetype[PDF - 6.40 MB]


This document cannot be previewed automatically as it exceeds 5 MB
Please click the thumbnail image to view the document.
Evaluation of Water-Jet-Assisted Cutting Capability on Longwall Shearers
Details:
  • 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 a pressure of 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.

  • Supporting Files:
    No Additional Files
No Related Documents.
You May Also Like: