Page 149 - Advanced Mine Ventilation

Generation of Respirable Coal Dust 129

Respirable (RDI)

of AxB/100%
Yield

Total Dust 24.2 28.5 18.6 23.5 27.1 22.4 20.8 23.2 24.6 30.5 26.6 21.2 6.4 17.8 28.0 18.1 17.8 15.8

at (B)
Undersize 1 / 2 [

Percent b 10/Density 36.0 38.0 22.0 39.0 39.0 39.0 46.0 51.0 43.0 42.0 44.0 30.0 9.5 29.0 43.0 73.0 42.0 45.0

Respirable 1 / 2 mm

Maximum a 10/Density Size 8.00 7.95 8.10 8.75 8.70 8.64 8.70 8.64 8.52 8.70 8.25 8.52 8.45 8.70 8.70 8.64 8.40 8.25 definition. by

Types (Mass Mean 67.3 75.0 84.5 60.3 69.5 57.5 45.2 45.5 57.3 72.5 60.5 70.5 67.3 61.3 65.0 24.8 42.3 35.2 8. Chapter

Coal (A) diameter ¼ 10/(density)1/2m in graph

Different of L37 Particles Percent) III 67.5 75.0 84.5 59.5 71.0 57.0 45.0 45.5 57.5 72.0 60.0 70.0 67.5 61.0 65.5 24.0 42.5 35.5 distribution

for II 67.0 74.5 84.0 61.0 69.0 57.5 45.5 45.5 57.0 73.5 61.0 71.0 67.5 61.5 65.0 25.5 42.0 35.0 Stoke’s mass
Dust Yield I 67.5 75.5 85.0 60.5 69.5 58.0 45.0 45.5 57.5 72.0 60.5 70.5 67.0 61.5 64.5 25.0 42.5 35.0 as here
Respirable Number expressed corresponding

of Sample 1 2 3 4 5 6 7 8 9 10 11 12 14 15 17 18 19 20 is size the to
Yield respirable referring

9.3 Experiment by
Table Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 a Maximum b Obtained