Perfluoromethylcyclohexane (PMCH) was released in a Midwestern underground longwall mine in the United States using a PMCH permeation plug release vessel (PPRV). The operators of this mine graciously allowed full access to an active longwall panel at two points in time to perform the test. This paper presents a study designed to determine the feasibility of using a PPRV in an underground mine environment for tracer gas studies. The results of this study showed that the PPRV is a feasible tracer delivery system for releasing PMCH at mine scale. Some of the advantages afforded by the PPRV over traditional release techniques are also highlighted.
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