Page 180 - Advanced Mine Ventilation

160 Advanced Mine Ventilation

Table 11.3 Current Diesel Particulate Matter (DPM) Standards

DPM Level
3
Country (mg/m ) Analytical Technique
Canada (metal mines) 0.75 Combustible respirable dust.
Germany 0.2 Total carbon by NIOSH 5040 method.
Sample collected gravimetrically.
USA (metal mines) 0.16 Total carbon by NIOSH 5040 method.
Sample collected gravimetrically.
USA (coal mines) Limits DPM Gravimetric measurement.
emission
a. Light duty outby engines <5 g/h
b. Heavy duty outby engines <2.5 g/h
c. Heavy duty permissible <2.5 g/h
engines
US States
a. West Virginia 0.12 Integrated system and ventilation.
b. Pennsylvania 0.12 Integrated system and ventilation.

In other countries where they do not have a DPM standard yet, they specify a min-
imum quantity of ventilation air to dilute the diesel exhaust. Table 11.4 shows some of
them.
It is, however, assumed that these ventilation quantities will not only dilute the
gases in diesel exhaust to safe levels but will also dilute the DPM to a safe level. Better
methods to control DPM will be discussed next.

Table 11.4 Ventilation Air for Diesel Engines

Ventilation Requirement
Country (CFM/BHP)
Australia 80e96
Canada (coal mines) 75e150
South Africa 95
United Kingdom (old) 140

BHP, per brake horsepower; CFM, cubic feet per minute.