Self-Designed Hydrophilicity-Related Geomaterials and Their Testing Utility in Simulation of Overlying Strata Instability

Table 4

Overlying strata structure of working face.

Number	Rock stratum	Thickness (m)	Volume Weight (g/cm^3)	Compressive strength (MPa)	Tensile strength (MPa)	Elastic modulus (GPa)	Poisson’s ratio	Water absorption rate
11	Coarse sandstone	73.7	2.3–2.52	117.5	14.90	21.30	0.27	2
10	Coarse sandstone	48	2.3–2.52	146.2	7.70	15.50	0.23	2
9	Medium-grained sandstone	6	2.4–2.48	53.7	1.70	7.94	0.22	12
8	Sandy mudstone	7.4	2.27–2.44	30.3	1.25	3.34	0.21	6
7	Sandy mudstone	38.9	2.27–2.44	121.3	5	5.4	0.25	6
6	Mudstone	8.7	2.18–2.34	38.8	1.2	1.2	0.15	0.7
5	Coarse sandstone	7.3	2.3–2.52	24.3	1	5.5	0.22	2
4	Mudstone	6.9	2.18–2.34	21.5	0.9	3.34	0.2	0.7
3	Sandy mudstone	9.6	2.27–2.44	49	3.6	9.5	0.19	6
2	Coarse sandstone	4	2.3–2.52	25.6	1	3.94	0.23	2
1	Coal	16	1.4–1.66	10.2	0.64	1.49	0.31	10