Simulation Analysis on Water’s Micro Seepage Laws under Different Pressure Gradients Using Computed Tomography Method

Table 4

Coal’s permeability and non-Darcy coefficients after fitting.

Coal region	Effective porosity	Correlation coefficient	Fitted value of A	Fitted value of B	Permeability (k/10^−4mD)	Non-Darcy coefficient (β/m^−1)
P1	18.15%	0.99967	3.64826	0.94244	2.30	942
P2	15.26%	0.9995	3.44116	0.80657	2.44	807
P3	14.57%	0.99912	3.40512	0.65068	2.46	651
P4	20.43%	0.99926	3.35691	0.44063	2.50	441