Reducing Methane in Coal Mine Gob Areas With Vertical Boreholes.
NTIS: PB/272-768 Available for Reference At Bureau Libraries :146 pages
This report on methods of reducing and controlling methane in coal mine gob areas indicates that vertical degas holes are beneficial to the mines of northern West Virginia working the Pittsburgh seam coal. The federal Bureau of Mines funded project involved the drilling and testing of 8 vertical holes based on a review of 13 previously in existence. Areas of observation included gas production history flow entry profile, underground methane reductions, strata separations, and casing loads. Observations led to the drilling of successful holes drilled short of the mine. Eleven gas production responses to applied vacuum tests were conducted at nine degas holes. Significant production responses were recorded over longwall gobs.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/272-768 Available for Reference At Bureau Libraries
Continental Oil Company