Gas Seepage Model and Experiment Based on Bedding Effect of Fractured Coal Body

Table 5

Calculated permeability value and actual permeability value at the same effective stress.

Effective stress	Calculated permeability value in the loading process				Actual permeability value in the unloading process
	P1	P2	V1	V2	P1	P2	V1	V2
11.75	0.00249	0.00302	0.00436	0.00500	0.00156	0.00182	0.00432	0.00494
10.42	0.00409	0.00494	0.00523	0.00599	0.00192	0.00243	0.00514	0.00591
9.08	0.00675	0.00809	0.00626	0.00718	0.00262	0.00314	0.00565	0.00651
7.75	0.01109	0.01321	0.00750	0.00861	0.00363	0.00428	0.00635	0.00732
6.42	0.01824	0.02157	0.00898	0.01032	0.00463	0.00528	0.00737	0.00841
5.08	0.03011	0.03534	0.01076	0.01238	0.00511	0.00612	0.00866	0.00991