Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China

Table 2

Physical and mechanical parameters of overlying strata.

No.	Lithology	Thickness (m)	Elastic modulus (GPa)	Compressive strength (MPa)	Tensile strength (MPa)	Volume force (kN·m^−3)
1	Loess layer	23.56	0	—	—	18
2	Laterite layer	36.80	0	—	—	18
3	Laterite conglomerate	30.62	1.56	10.21	—	21
4	Siltstone	14.00	1.65	15.96	1.65	25
5	Sandstone	5.37	1.94	21.23	1.82	26
6	Siltstone	8.90	11.23	40.5	3.72	27
7	Sandstone	20.60	18.14	80.5	7.1	27
8	Mudstone	1.60	14.22	56.8	4.3	27
9	Sandstone	13.46	13.2	50.3	3.91	27
10	Siltstone	6.05	12.2	43.21	3.92	27
11	Sandstone	15.48	16.2	69.8	5.97	27
12	Mudstone	1.10	9.58	38.9	3.25	27
13	No. II1 coal seam	5.5	1.93	13.9	0.73	15
14	Siltstone	11.71	9.26	37.5	3.16	27
15	Limestone	0.55	6.72	28.91	2.36	26