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

Table 6

The comparison of field data and retrieved data.

Height/m	Equivalent dust concentration/(g/m^3)
	Field data	Retrieved data	Relative error
0.5	0.583638	0.619065	0.060700756
1.5	0.626850	0.677079	0.080129348
2.5	0.410757	0.443890	0.080663723