Experimental Investigation of the Effects of the Gangue Particle Size on the Evolution Rules of Key Seepage Parameters

Table 1

Test scheme.

Test order	Particle size of gangues (mm)	Axial load (MPa)	Hydraulic pressure (MPa)
i-1	0~5	4, 6, 8, 10, 16, 20	2, 3, 4, 5, 6, 7, 8
i-2	5~10	4, 6, 8, 10, 16, 20	2, 3, 4, 5, 6, 7, 8
i-3	10~15	4, 6, 8, 10, 16, 20	2, 3, 4, 5, 6, 7, 8
i-4	15~20	4, 6, 8, 10, 16, 20	2, 3, 4, 5, 6, 7, 8