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Results 41 - 45 of 45
6/1/1995 - Peer reviewed journal articlesThe U.S. Bureau of Mines (USBM) has developed an inflatable feed-tube seal (IFTS) for high-expansion foam generators. The IFTS is a lightweight, portable, rectangular inflatable bag that can be used by firefighters to rapidly seal large openings, such a...
1/1/1993 - Reports of InvestigationsDuring the normal course of underground coal mining, it sometimes becomes necessary to seal off abandoned areas to eliminate the need to ventilate them. Seals also are used to isolate fire zones or areas susceptible to spontaneous combustion. The object...
1/1/1991 - Reports of InvestigationsThe U.S. Bureau of Mines conducted explosion tests on various full- scale cementitious bulkheads used in abandoned mine areas to evaluate the ability of the bulkheads to withstand gas explosion overpressures of 20 psig. Tests were performed on 120-ft2 s...
1/1/1986 - Information CircularsThe Bureau of Mines used sulfur hexafluoride (sf6) tracer gas to evaluate the effectiveness of gob ventilation and/or sealing practices at three coal mines, each having different problems associated with their mined-out areas.
7/1/1972 - Technical Progress ReportsAn 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 ...