Fractal Pore and Its Impact on Gas Adsorption Capacity of Outburst Coal: Geological Significance to Coalbed Gas Occurrence and Outburst

Table 2

Pore structure parameters of the coal samples measured by HP-MIP and LP-N₂GA.

Sample	Porosity (%)	Pore volume (cm^3/g)				Specific surface area (m^2/g)				Total PV (cm^3/g)	Total SSA (m^2/g)
		Macropores HP-MIP	Mesopores HP-MIP	Transition pores LP-N2GA BJH	Micropores LP-N2GA BJH	Macropores HP-MIP	Mesopores HP-MIP	Transition pores LP-N2GA BET	Micropores LP-N2GA BET
ZC-S5	3.06	0.0017	0.0013	0.0008	0.0002	0.002	0.023	0.130	0.266	0.0041	0.421
ZC-S8	2.24	0.0012	0.0006	0.0005	0.0001	0.001	0.012	0.074	0.052	0.0024	0.139
ZC-Q9	3.92	0.0040	0.0020	0.0010	0.0004	0.006	0.034	0.164	0.435	0.0074	0.640
ZC-S12	3.98	0.0039	0.0022	0.0012	0.0005	0.004	0.037	0.182	0.389	0.0078	0.612
TC-1	5.31	0.0092	0.0060	0.0023	0.0014	0.010	0.088	0.381	1.578	0.0188	2.057
TC-2	7.29	0.0140	0.0170	0.0036	0.0014	0.011	0.249	0.602	1.837	0.0360	2.699
TC-3	4.69	0.0174	0.0040	0.0028	0.0013	0.015	0.061	0.444	1.868	0.0255	2.388
TC-4	6.79	0.0089	0.0071	0.0027	0.0022	0.007	0.137	0.444	2.706	0.0208	3.294