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The National Mining Association and the Mine safety and Health Administration requested that the National Institute for Occupational Safety and Health (NIOSH) conduct full-scale evaluations of a recently developed carbon fiber-reinforced polymer (CFRP) reinforcement technique for upgrading existing mine ventilation seals to withstand an explosion pressure of 50 psi or greater. The evaluation was conducted in the NIOSH Pittsburgh Research Laboratory's Lake Lynn Experimental Mine (LLEM). The purpose of the evaluation was to determine the blast resistance of the CFRP reinforcement technique,...

At the request of the Mine safety and Health Administration (MSHA) and the West Virginia Office of Miners' Health, Safety, and Training, the NIOSH's Pittsburgh Research Laboratory evaluated the effects of explosions on specific mine ventilation seals at its Lake Lynn Experimental Mine to assist the agencies in their investigations of the explosion at the Sago Mine in West Virginia, which occurred on January 2, 2006. Six full-scale explosion tests were conducted to help answer questions regarding possible scenarios for the Sago explosion. NIOSH's findings and recommendations are documented...

nThe National Institute for Occupational Safety and Health (NIOSH)'s Pittsburgh Research Laboratory conducted a full-scale test of a composite polyurethane-aggregate seal in a hydrostatic chamber at the Lake Lynn Experimental Mine. The report details the test results of the composite polyurethane-aggregate seal and provides an analysis of those results in terms of the seal's structural behavior.

The National Institute for Occupational Safety and Health (NIOSH) with assistance from MSHA, conducted an extensive review of bulkhead permits submitted to MSHA's technical Support office in Bruceton, PA. This NIOSH Information Circular was developed for operations that need to construct an underground impoundment system, as well as for those that currently operate one. The information contained in this report is geared toward the permitting aspect. However information on monitoring and emergency response planning and training could be useful to operations that currently have underground...