Evolution Characteristics of Overburden Instability and Failure under Deep Complex Mining Conditions

Table 9

Numerical simulation rock mechanics parameter table.

Classification	Thickness (m)	(GPa)	(kg/m^3)	(MPa)	(MPa)	(°)	(GPa)
Siltstone	8	6.54	2550	7.5	3.6	40	3.31
Coal seam	5	0.42	1300	2.4	2	18	0.13
Mudstone	25	2.45	3530	3.5	2.4	29	1.19
Gravel rock	30	2.48	2560	3.6	3	30	1.25
Sandy mudstone	6	2.53	2540	4.5	3.2	36	1.26
Fine sandstone	5	6.22	2520	7.2	3.7	38	3.48
Middle sandstone	10	7.56	2590	8.7	3.9	46	3.67