Evolution Mechanism of Water-Conducting Channel of Collapse Column in Karst Mining Area of Southwest China

Table 2

The percolation mechanical parameters of joints.

Rock strata	h/m	jkn/GPa	jks/GPa	jfric/°	jperm/Pa-1.s-1	ares/m	azero/m
Limestone	138	8.06	6.39	10	246	0.003	0.02
Kern stone	4	7.46	6.18	11	198	0.003	0.02
Limestone	20	8.06	6.39	10	246	0.003	0.02
Siltstone	6	4.58	2.73	8	128	0.003	0.02
Silty mudstone	13	8.06	6.39	11	100	0.003	0.02
Fine sandstone	7	4.58	2.73	10	143	0.003	0.02
Silty mudstone	9	8.06	6.39	11	100	0.003	0.02
Fine sandstone	30	4.58	2.73	10	143	0.003	0.02
Silty mudstone	5	8.06	6.39	11	100	0.003	0.02
Fine sandstone	6	4.58	2.73	10	143	0.003	0.02
Coal seam	2	4.09	2.50	10	85	0.0003	0.003
Argillaceous siltstone	5	4.58	2.73	15	95	0.003	0.02
Collapse column	186	3.46	2.20	14	330	0.010	0.08