The Relationship between Current Ground Stress and Permeability of Coal in Superimposed Zones of Multistage Tectonic Movement

Table 1

The average GSI value and permeability of partial CBM wells in different structural superposition zones.

Zones	Well number	The average GSI value	Permeability (10^-3 μm^2)
I2	S-010	35	0.026
I2	S-011	38	0.056
I3	S-058	33	0.015
I1	S-117	28	0.008
I4	S-124	33	0.013
II4	S-005	68	0.160
II3	S-018	70	0.110
II4	S-019	69	0.120
II2	S-064	69	0.121
II1	S-085	66	0.321
III3	S-015	38	0.052
III3	S-020	39	0.083
III2	S-044	36	0.028
III2	S-062	35	0.021
III1	S-090	38	0.062
IV4	S-008	74	0.030
IV4	S-013	69	0.120
IV1	S-034	64	0.471
IV1	S-035	60	0.760
IV3	S-040	72	0.052
V2	S-050	36	0.033
V2	S-051	38	0.060
V1	S-060	41	0.150
V1	S-072	39	0.082
V1	S-073	35	0.020
VI2	S-029	63	0.494
VI2	S-030	63	0.544
VI4	S-036	57	0.980
VI3	S-041	62	0.619
VI4	S-042	72	0.064