A Novel True Triaxial Apparatus for Testing Shear Seepage in Gas-Solid Coupling Coal

Table 1

Loading parameters.

Number	Preset (MPa)	Preset (MPa)	Preset (MPa)	(MPa)
1	4	4	4	0.5
2	6	6	4
3	8	8	4
4	4	4	4	1.0
5	6	6	4
6	8	8	4
7	4	4	4
8	6	6	4	1.5
9	8	8	4