Dynamic Evolution Law of Overburden Rock in Shallow-Buried Super-High Fully Mechanized Working Face and Determination of Support Strength

Table 2

Prototype and model rock strength and material ratio.

No.	Rock name	Actual thickness (m)	Model thickness (cm)	Volume force (kN/m^3)	Tensile strength (MPa)	Modulus of elasticity (GPa)	Matching number
50	Wind-blown sand	20.85	13.90	17.00	2.38	4.00	673
49	Sandy mudstone	1.65	1.10	24.10	3.60	18.00	673
48	Siltstone	6.05	4.03	23.80	4.45	35.00	637
47	Sandy mudstone	4.50	3.00	24.10	3.60	18.00	573
46	Siltstone	9.76	6.51	23.80	4.45	35.00	637
45	Post stone	2.44	1.63	23.90	7.20	32.00	455
44	Siltstone	2.19	1.46	23.80	4.45	35.00	637
43	Medium sandstone	1.50	1.00	24.80	6.13	38.00	637
42	Sandy mudstone	4.27	2.85	24.10	3.60	18.00	637
41	Siltstone	4.25	2.83	23.80	4.45	35.00	637
40	Medium sandstone	3.85	2.57	24.80	6.13	38.00	437
39	Siltstone	1.90	1.27	23.80	4.45	35.00	637
38	Post stone	1.10	0.73	23.90	7.20	32.00	573
37	Sandy mudstone	5.20	3.47	24.10	3.60	18.00	573
36	Siltstone	11.50	7.67	23.80	4.45	35.00	637
35	Post stone	2.80	1.87	23.0	7.20	32.00	455
34	Siltstone	9.50	6.33	24.80	6.13	38.00	437
33	Medium sandstone	8.14	5.43	23.80	4.45	35.00	337
32	Post stone	3.50	2.33	24.80	6.13	38.00	455
31	Siltstone	1.16	0.77	23.80	4.45	35.00	455
30	Post stone	3.50	2.33	23.90	7.20	32.00	455
29	Siltstone	4.77	3.18	23.80	4.45	35.00	455
28	Post stone	1.40	0.93	23.90	7.20	32.00	455
27	Siltstone	5.82	3.88	23.80	4.45	35.00	637
26	Post stone	2.16	1.44	23.90	7.20	32.00	455
25	Medium sandstone	2.23	1.49	24.80	6.13	38.00	437