Simulation Analysis of Influencing Factors of Subsidence Based on Mining under Huge Loose Strata: A Case Study of Heze Mining Area, China

Table 1

Numerical simulation of material mechanics parameters.

Serial number	Stratum	Bulk modulus (MPa)	Shear modulus (MPa)	Cohesion (MPa)	Internal friction angle (°)	Tensile strength (MPa)	Density (kg·m^-3)
1	Covered soil	16.7	5.4	0.12	17	0	1875
2	Clay	22	16.5	0.15	18	0	1960
3	Sandy clay	26.5	17	0.16	18	0	1975
4	Fine sand	33.5	17.5	0.14	18	0	1985
5	Gravel	35	19	0.14	19	0	1945
6	Transitional font	27.5	165	0.17	22	0.86	2150
7	Mudstone	33	1350	2.30	34	1.63	2600
8	Fine sandstone	3750	1350	6.50	39	2.45	2300
9	Immediate roof	2850	1450	2.85	31	2.40	2550
10	Coal seam	1900	1200	2.15	32	2.25	1450
11	Floor	4250	2600	3.30	37	3.55	2600