Optical Estimation on Pollution Level of Respirable Dust Based on Infrared Transmitting Behavior in Coalmine Fully Mechanized Working Face

Table 1

Distribution of the coal particle concentration and diameter.

Distance/m	Dust concentration/(kg/m^3)	Diameter distribution by Rosin-Rammler
		4.0		0.0125	1.0103	0.9718
		4.4		0.0261	0.8960	0.9733
6.2		0.0294	0.8173	0.9744
8.0		0.0101	1.0873	0.9871
10.2		0.0201	0.9932	0.9905
16.4		0.0230	0.9565	0.9876
21.8		0.0198	1.0012	0.9877
22.2		0.0156	1.1846	0.9838
27.6		0.0146	1.4109	0.9753
35.8		0.0185	1.2583	0.9764
40.6		0.0322	1.0115	0.9730
53.2		0.0217	1.1752	0.9878
62.0		0.0246	1.1307	0.9865
67.6		0.0480	0.9245	0.9490
71.6		0.0506	0.9608	0.9509
84.8		0.0434	1.0070	0.9632
88.6		0.0212	1.4730	0.9781
94.6		0.0259	1.3287	0.9794
100.0		0.0095	1.6982	0.9865