“Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study

Table 3

Physical and mechanical parameter table of numerical model materials.

Lithology	Density (kg·m^−3)	Compressive strength (MPa)	Tensile strength (MPa)	Elastic modulus (GPa)	Internal cohesion (MPa)	Internal friction angle (°)	Poisson ratio
Medium grained sandstone	2300	21.76	0.61	11.73	1.62	32	0.25
Gritstone	2360	28.39	0.83	21.35	1.83	36	0.21
Siltstone	2860	27.62	0.71	19.04	1.24	37	0.23
Mudstone	2620	17.36	0.56	9.60	0.86	34	0.24
Fine-sandstone	2510	23.30	0.96	14.37	1.36	47	0.21
Carbon mudstone	2650	17.36	0.56	8.03	0.47	27.25	0.24
Coal	1310	11.65	0.47	8.71	0.50	26.36	0.23
Siltstone	2860	27.62	0.71	19.04	1.42	37	0.23