Seepage Property of Crushed Mudstone Rock in Collapse Column

Table 1

Experimental program.

Specimen group	Specimen no.	Particle size (mm)	Porosity	Hydraulic pressure (MPa)
1	1a	5.0∼7.5	0.19	0.7
	1b	7.5∼10.0	0.19	0.7
	1c	10.0∼12.5	0.19	0.7
	1d	12.5∼15.0	0.19	0.7
2	2a	10.0∼12.5	0.15	0.7
	2b	10.0∼12.5	0.19	0.7
	2c	10.0∼12.5	0.23	0.7
	2d	10.0∼12.5	0.27	0.7
3	3a	7.5∼10.0	0.19	0.3
	3b	7.5∼10.0	0.19	0.7
	3c	7.5∼10.0	0.19	1.1
	3d	7.5∼10.0	0.19	1.5