Development, testing and proposed application of multiple passive source tracers for underground mine ventilation systems

摘要

The application of passive tracer gas sources in underground mines is particularly useful for long-term tracer studies as well as for studies conducted in permissible areas of underground coal mines. The use of passive perfluoromethylcyclohexane (PMCH) sources has been previously demonstrated in underground mines, but this new work details the testing of multiple, distinct tracer compounds compatible with passive sources. A description of their potential application in mine ventilation systems is also provided. Three tracer compounds are detailed: (1) PMCH, (2) perfluoroethylcyclohexane (PECH) and perfluoromethylcyclopentane (PMCP). The release rates of these tracers were examined over a 180-day period at multiple temperatures. The advantages and disadvantages of these sources are presented, along with potential applications in characterizing ventilation circuits, flow through gob and leakage.