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- Hazard prevention and control:
- Ventilation
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Results 71 - 80 of 83
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1/1/1992 - Reports of InvestigationsFour coreholes were drilled at a longwall mine in the Lower Kittanning coalbed to obtain coal and rock samples from overlying strata to determine their gas content during the mining cycle. Test results indicate that 91% of the gas came from coalbeds.
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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.
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12/1/1982 - Reports of InvestigationsSulfur hexafluoride (SF6) is an odorless, colorless, nontoxic gas that has found acceptance as a tracer gas in research on ventilation patterns, measurement of air leak rates, respirable dust reductions due to bagging hood modifications, and the study o...
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1/1/1980 - Reports of InvestigationsThe face ventilation measurement method developed by the Bureau of Mines involves releasing a small volume of tracer gas (SF6) on the off-curtain side of the working face at the start of the mining cycle.
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9/1/1977 - Contract reports, Open File ReportsAn existing computer program for mine ventilation network is modified so that it can simulate ventilation conditions under the influence of mine fires. The resulting new program is designed for the practical ventilation engineer and should be applicable...
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1/1/1974 - Reports of InvestigationsThe Bureau of Mines found sulfur hexafluoride (SF6), released from a lecture bottle, to be an ideal gaseous tracer for studying mine ventilation systems. In a Pennsylvania limestone mine, this technique was useful in evaluating the effectiveness of auxi...
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1/1/1973 - Reports of InvestigationsThe applicability of the "direct method" for determining the methane content of virgin coalbeds was tested. Preliminary results indicate that the direct method, when applied to exploration cores, can be successfully used to estimate coalbed gas content ...
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3/1/1969 - Technical Progress ReportsAn experimental degasification program using a vertical borehole and vacuum pump to drain gas from the gob area of a longwall panel was successful at Bethlehem Mines Corporation, Cambria Division, No. 33 coal mine. Sixty-one million cubic feet of methan...
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1/1/1960 - NIOSH/USBM numbered publicationsThis bulletin is written to explain in layman language the basic laws and fundamentals of mine airflow and their application to the solution of common ventilating problems. The attempt is to reduce the complex and difficult ventilating formulas to simpl...
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8/1/1995 - Unpublished documents and reportsMFIRE is a computer simulation program that performs normal ventilation network planning calculations, and dynamic transient state simulation of ventilation networks under a variety of conditions. This user manual describes the development of MFIRE, the...
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Content source: National Institute for Occupational Safety and Health, Mining Program