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.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Longwall shearer performance using water-jet-assisted cutting

Filetype[PDF-7.84 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
  • English
    • Details You May Also Like

    Details:

    • Personal Author:
      Kovscek, P. D. (Paul D.)
    • Corporate Authors:
      United States. Bureau of Mines.
    • Description:
      "The Bureau of Mines equipped a longwall shearer with a water-jet- assisted mechanical cutting system to determine the effect of the high-pressure sprays on machine performance, airborne dust levels generated, and size of particles formed. Testing was conducted on a simulated coal block (coalcrete) while cutting at a water pressure of 190 psi and at water-jet-assisted pressures ranging from 1,000 to 6,000 psi. The shearer motor energy used by the shearer while cutting coalcrete was determined for each cutting condition. Results indicate that the motor energy required by the shearer for each ton of material cut did not vary significantly as the water pressure was increased. Results of dust measurements recorded near the cutting drum indicate that at water pressures above 3,000 psi, dust reductions up to 85 pct were achieved compared with cutting with conventional sprays. Analysis of the particle size distribution during cutting showed that increasing the water pressure resulted in increased median particle size. In light of these results, various mechanisms for water-jet-assisted cutting are discussed." - NIOSHTIC-2

      NIOSHTIC no. 10005327

    • Subjects:
    • Series:
      Report of investigations (United States. Bureau of Mines) ; 9046
    • Document Type:
      Report
    • Collection(s):
    • Main Document Checksum:
    • Download URL:
    • File Type:

    Supporting Files

    • No Additional Files

    More +

    You May Also Like

    Checkout today's featured content at stacks.cdc.gov