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 5

Proportion of the similar simulated material.

Strata	Proportion	Cement	Saw dust	Water (%)
	(Sand : micas : cement)	(Gypsum : CaCO3)
Coarse sandstone	80 : 17 : 3	3 : 7	0	10
Sandy mudstone 4	80 : 18 : 2	5 : 5	0	10
Anding formation sandstone 4	73 : 23 : 4	3 : 7	0	10
Anding-Zhiluo formation sandstone	80 : 18 : 2	5 : 5	0	10
Zhiluo formation sandstone	80 : 18 : 2	5 : 5	0	10
Sandy mudstone 3	73 : 23 : 4	3 : 7	0	10
Medium sandstone 1	80 : 18 : 2	7 : 3	0	10
Sandy mudstone 2	80 : 17 : 3	5 : 5	0	10
Coal	80 : 17 : 3	3 : 7	0	10
Sandy mudstone 1	73 : 23 : 4	5 : 5	0	10