A New Method for Predicting Coal and Gas Outbursts

Table 2

Parameters including gas adsorption constant and proximate analysis of the C9 coal seam.

Coal seam	Sampling site	Proximate analysis (%)			True density, TRD	Apparent density, ARD	Porosity, F (%)	Gas adsorption constant
		M ad	Ad	Vdaf				a	b
C9	Transportation roadway in the 121901 working face at the 1800 m level	0.43	8.74	22.31	1.37	1.20	12.41	20.5147	0.8480

Note: adsorption experiments were conducted at t_S = 30°C.