Discussion on Advanced Seepage Reduction Characteristics of Working Face under Seepage-Damage Coupling

Table 1

Parameter table of rock stratum and rock mechanical properties.

Rock number	Lithology	Thickness (m)	Modulus of elasticity (MPa)	Compressive strength (MPa)	Gravity density (104 N/m)	Internal friction angle (°)	Poisson’s ratio	Cohesive force (MPa)
14	Overlying strata	200	4728.6	12.58	2.50	40.5	0.19	3.10
6	Middle conglomerate (aquifer)	30	6000	14.60	2.50	42	0.19	3.27
5	Mudstone	25	4300	12.38	2.52	39	0.18	3.32
4	Medium coarse sandstone (aquifer)	55	3900	12.11	2.53	40.5	0.18	3.49
2	Mudstone	10	4300	12.38	2.52	39	0.18	3.32
1	Coal seam	8	1000	4.08	1.35	38	0.28	2.13
0	Siltstone	30	4800	13.45	2.85	41.5	0.24	4.88