Welcome to CDC stacks | Effect Of A Surface Borehole On Longwall Gob Degasification (Pocahontas No. 3 Coalbed) - 9213 | 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
Effect Of A Surface Borehole On Longwall Gob Degasification (Pocahontas No. 3 Coalbed)
  • Published Date:
    1/1/1972
Filetype[PDF-2.44 MB]


Details:
  • Description:
    The use of a partially slotted 6.5-inch-inside-diameter vertical pipe to remove methane from a longwall gob area at a depth of 2,260 feet in the Pocahontas No. 3 coalbed ms investigated. The value of gas removed by such a pipe under free-flow conditions was found to equal the cost of the installation in this case. Approximately 25 percent of the available methane passed through the pipe without the use of an exhauster; an additional 10 percent was removed when an exhauster was employed. The diversion of methane through a vertical slotted pipe to the surface permitted the use of increased mining rates and decreased the ventilation air requirements.

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