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 3

Weak cementation strata and some parameters.

No.	Strata	Thickness (m)	Density (kg/m^3)
11	Topsoil	86	1984
10	Sandy mudstone 5	27	2118
9	Zhidan group sandstone	300	2118
8	Coarse sandstone	14	2350
7	Sandy mudstone 4	22	2467
6	Anding formation sandstone	40	2274
5	Anding-Zhiluo formation sandstone	50	2376
4	Zhiluo formation sandstone	120	2418
3	Sandy mudstone 3	23	2405
2	Medium sandstone 1	10	2490
1	Sandy mudstone 2	33	2453