Study on the Strata Movement Rule of the Ultrathick and Weak Cementation Overburden in Deep Mining by Similar Material Simulation: A Case Study in China

Table 4

Comparison table of material mechanical properties.

Strata	Prototype				Model
	h (m)	H (m)	(kN/m^3)	(MPa)	h (m)	H (m)	c	(MPa)
Coarse sandstone	14		24	24.7	35	15	0.63	0.0386
Sandy mudstone 4	22		25.12	32.93	55	15	0.6	0.0492
Anding formation sandstone	40		22.72	27.42	100	15	0.66	0.0453
Anding-Zhiluo formation sandstone	50		24.05	30.15	125	15	0.62	0.047
Zhiluo formation sandstone	120		24.57	32.43	300	15	0.61	0.0495
Sandy mudstone 3	23		24.64	30.29	57.5	15	0.61	0.0461
Medium sandstone 1	10		22.72	31.43	25	15	0.66	0.0519
Sandy mudstone 2	33		24.81	38.33	82.5	15	0.6	0.0579
Coal	6		12.67	11.44	15	15	1.18	0.0339
Sandy mudstone 1	32		24.09	41.45	80	15	0.62	0.0645