Occupation

No of mines

 

No of samples

Range (mg/m3)

Mean (mg/m3)

 

 

 

 

 

 

Continuous miner operator

21

 

178

0.02-21.44

4.08

Continuous miner helper

19

 

131

0.44-18.90

3.47

Cutting machine operator

15

 

98

0.71-15.42

3.69

Cutting machine helper

8

 

37

0.77-14.70

4.45

Coal drill operator

9

 

59

0.42-12.94

3.55

Loading machine operator

18

 

97

0.25-39.56

3.75

Table 3: Mine operator samples.