Results 271 - 280 of 282

• Methane Control by Isolation of a Major Coal Panel - Pittsburgh Coalbed
  1/1/1973 - Reports of Investigations
  As one of its projects for degasification of major panels of coal prior to mining within them, the Bureau of Mines conducted methane emission studies during development of a set of three headings 1,800 feet in a major coal panel (2,700 by 3,500 feet) wh...
• Methane Control in Eastern U.S. Coal Mines : Proceedings of the Symposium of the Bureau of Mines/Industry Technology Transfer Seminar, Morgantown, W. Va., May 30-31, 1973
  1/1/1973 - Information Circulars
  Research workers from the Bureau of Mines and industry met with other government and industry representatives at the Mont Chateau Lodge, Morgantown, West Virginia, on May 30-31, 1973, to discuss the current status of methane control in eastern U.S. coal...
• Demonstration of Safety Plugging of Oil Wells Penetrating Appalachian Coal Mines
  7/1/1972 - Technical Progress Reports
  An oil well penetrating the Pittsburgh bituminous coalbed in northern West Virginia was plugged and safely mined through 3 months later. Effectiveness of the plugging in preventing reservoir gas from entering the mine through the well hole was verified ...
• Methane Emission from U.S. Coal Mines, A Survey
  1/1/1972 - Information Circulars
  This survey was conducted to determine the magnitude of the methane emission and control problem in U.S. bituminous coal mines. The resultant data indicate that the emission rate for any given coalbed depends primarily on the coal production rate and on...
• Methane Migration Characteristics of the Pocahontas No. 3 Coalbed
  1/1/1972 - Reports of Investigations
  Methane-flow and pressure data taken from a mine in the Pocahontas No. 3 Coalbed are compared with flow rates from lump coal obtained in laboratory experiments. From this, it is concluded that the main source of gas is the intact coalbed rather than a "...
• The Methane Migration and Storage Characteristics of the Pittsburgh, Pocahontas No. 3, and Oklahoma Hartshorne Coalbeds
  1/1/1972 - Reports of Investigations
  Methane flows and pressures were measured in mines in the Pittsburgh, Hartshorne, and Pocahontas No. 3 Coalbeds. From the data, the permeability of each of these coalbeds was computed.
• Methane Emission Rate Studies in a Central Pennsylvania Mine
  1/1/1971 - Reports of Investigations
  The purpose of this study was to determine the characteristics of methane emissions during coal extraction by a longwall mining system. The study was conducted over 22 consecutive shifts. The average methane emission rate from the Lower Kittanning coalb...
• Methane Emission Rate Studies in a Northern West Virginia Mine
  8/1/1970 - Technical Progress Reports
  Methane emission rates were studied in a Pittsburgh coalbed mine in northern West Virginia. Air volumes and methane percentages were recorded, and time studies of the miner were made during five consecutive operating days, during which a complete cycle...
• Removing Methane (Degasification) from the Pittsburgh Coalbed in Northern West Virginia
  1/1/1962 - Reports of Investigations
  A joint investigation by the Bureau of Mines and the Christopher Coal Co. at the Humphrey No. 7 mine, operating in the Pittsburgh coalbed in northern West Virginia, was undertaken to gain more insight concerning the hazardous emission of methane gas in ...
• Best Practices for Dust Control in Coal Mining
  1/1/2010 - Information Circulars, Safety guidelines, tips, and checklists
  This handbook was developed to identify available engineering controls that can help the industry reduce worker exposure to respirable coal and silica dust.