Using sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines.
Thimons-ED; Bielicki-RJ; Kissell-FN
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7916, 1974 Jan; :1-22
The Bureau of Mines found sulfur hexafluoride (sf6), released from a lecture bottle, to be an ideal gaseous tracer for studying mine ventilation systems. Air samples were collected in glass syringes and analyzed by electron-capture gas chromatography. In these studies, the lower limit of detection was about 1 part per billion by volume (ppb) of sf6 per part of air. Experiments conducted in a Pennsylvania limestone mine showed this technique useful in evaluating the effectiveness of auxiliary fans, measuring low flow velocities, probing the air circulating near a working face region where ventilation appeared to be poor, and estimating volumetric flow rates in airways of large cross-sectional area and having low flow velocities. This technique was also used in a western vein- type metal mine to measure the amount of return air being recirculated into the intake air due to leakage through old stoped areas.
Mine-gases; Mining-industry; Methanes; Methane-drainage; Methane-control; Explosive-gases; Explosive-atmospheres; Underground-mining; Coal-mining; Control-technology; Engineering-controls
IH; Report of Investigations
NTIS Accession No.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7916