Sensitivity Analysis and Numerical Simulation Study on Main Controlling Factors of Surface Movement and Deformation in Strip Filling Mining under Thick Unconsolidated Layers

Table 1

Numerical simulation of mechanical parameters of materials.

Name of rock stratum	Bulk modulus (GPa)	Shear modulus (GPa)	Cohesion (MPa)	Internal friction angle (°)	Uniaxial tensile strength (MPa)	Bulk density (kg/m^3)
Covering soil 3	0.03	0.08	0.12	18	0.02	1870
Covering soil 2	0.04	0.09	0.13	19	0.01	1870
Covering soil 1	0.02	0.11	0.15	17	0.02	1870
Clay 2	0.02	0.09	0.55	18	0.01	1980
Clay 1	0.04	0.14	0.58	19	0.02	1980
Sand 2	0.05	0.07	0.27	15	0.03	1970
Sand 1	0.03	0.05	0.17	18	0.01	1970
Gravel 2	0.04	0.07	0.19	17	0.02	1900
Gravel 1	0.05	0.06	0.17	18	0.01	1900
Coarse sandstone 3	6.55	5.85	6.58	33	6.45	2200
Medium sandstone 2	5.90	5.30	5.52	33	5.79	2500
Coarse sandstone 2	5.55	3.85	6.18	31	6.45	2200
Medium sandstone 1	5.50	5.50	6.52	32	6.19	2500
Coarse sandstone 1	5.55	4.85	7.18	33	6.45	2200
Mudstone	5.10	2.55	3.20	30	3.55	2350
Coal	1.85	1.30	2.15	29	2.40	1500
Sandstone 2	5.60	4.20	9.53	34	9.35	2600
Sandstone 1	5.80	4.30	9.85	35	9.95	2600
2.0 MPa filling body	1.41	0.50	0.55	28	0.12	2200
2.5 MPa filling body	2.50	0.90	1.05	28	0.17	2200
3.0 MPa filling body	3.52	1.25	1.37	28	0.25	2200
3.5 MPa filling body	4.55	1.67	1.75	28	0.32	2200
4.0 MPa filling body	5.60	2.10	2.20	28	0.41	2200