An approach to air quality control for diesel mucking in underground mines.
Ann Am Conf Gov Ind Hyg 1984 Jan; 8:107-117
The Bureau of Mines, in its pursuit of methods to improve the quality of the underground workplace, has funded studies on the behavior of diesel exhaust components in deadened drifts. Real-time and time-integrated measurements of CO2, CO, NO, and NO2 and gravimetric measurements of particulates analyzed for hydrogen, carbon, and the nitrogen fraction were performed in several mines and under controlled conditions in a test drift. The relationship among the contaminants was examined in light of the fact that the CO2 concentrations found are only the result of the amount of fuel burned and the exhaust dilution of background CO2 is subtracted out. Although the engine operates over several modes for a given production activity, the ratio of each of the other exhaust-contaminant concentrations to the CO2 concentration was found to be relatively constant for a given engine in a given activity. The fact that the relationship is constant can be exploited in that CO2 levels alone can be used to give a measure of the level of diesel exhaust air quality. Furthermore, time-weighted averages of the other contaminants and co2, or direct tailpipe measurements with the engine suitably loaded, can be made and the ratios compared with previous data.
Mining-industry; Underground-mining; Exhaust-gases; Diesel-exhausts; Diesel-emissions; Particulate-dust; Particulates; Aerosols; Aerosol-particles
124-38-9; 630-08-0; 10102-44-0; 10024-97-2
OP; Conference/Symposia Proceedings
Annals of the American Conference of Governmental Industrial Hygienists