Modify Selection
- Products and materials:
- Methane
Home Links
Results 111 - 120 of 149
-
1/1/1979 - Reports of InvestigationsBecause of the high number of accidental methane gas ignitions in metal and nonmetal mines, the Bureau of Mines searched for a simple guideline that would allow mine personnel to evaluate the methane hazard in a given mine.
-
1/1/1978 - Reports of InvestigationsThe methane gas emitted from coal samples collected from the conveyor belts dumping into silos was measured. Approximately 50 pct of the total gas desorbed into a sealed can within 1 week was released during the first 24 hours. No simple correlation bet...
-
1/1/1978 - Reports of InvestigationsThe Bureau of Mines examined the wellbore of a vertical gas drainage well in the Mary Lee coalbed to determine the results of specific completion procedures in coal. A jet-slotting tool was used to cut four vertical slots through the casing about 1 ft b...
-
1/1/1978 - Reports of InvestigationsDiscusses research to determine the effectiveness of long holes in degasifying an area of the upper split of the lower Sunnyside coalbed at Kaiser SteelCompany Sunnyside No. 1 mine. These holes were drilled from the two outside entries of a section that...
-
1/1/1978 - Reports of InvestigationsThe Bureau of Mines investigated factors that influence the formation of methane and other hydrocarbon gases in coal, which is an integral part of the coalification process.
-
1/1/1978 - Reports of InvestigationsThe Bureau of Mines investigated the presence and extent of methane accumulations in mine roof cavities using a full-scale mine model. Methane was released at a constant rate into the roof of a cavity built onto a 700-ft wind tunnel.
-
1/1/1977 - Reports of InvestigationsThe Bureau of Mines estimated the methane content of a coal, which depends primarily upon rank and pressure, from the adsorption equation V = kPn, where k and n are constants related to rank.
-
1/1/1977 - Reports of InvestigationsThe Bureau of Mines made laboratory absorption measurements on oil shale samples, which showed that the amount of methane absorbed is proportional to pressure and oil yield, and can be much larger than would be predicted based solely on porosity. Oil sh...
-
1/1/1977 - Reports of InvestigationsThe Upper Freeport coalbed was studied in Fayette County, Pennsylvania. This coalbed lies about 650 feet below the Pittsburgh coalbed and contains the largest remaining reserves of any coalbed in the county.
-
1/1/1977 - Information CircularsThis Bureau of Mines report tabulates methane emissions from U.S. Bituminous coal mines with daily emission rates of at least 100,000 cfd according to states, counties, and coalbeds. Most of the methane emitted is from mines in the Appalachian States. T...
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program