Numerical Simulation of Surface Movement and Deformation Caused by Underground Mining with Complex Stratigraphic Boundary

Table 1

Summary of rock mass mechanical parameters.

Rock stratum	Bulk density (kN/m^3)	Cohesion (MPa)	Internal friction angle (°)	Elastic modulus (GPa)	Poisson’s ratio
Quaternary soil	1.9	0.56	29.3	0.021	0.32
Neogene rock mass	2.7	0.60	33.0	6.0	0.21
K1 ore body roof	2.7	3.28	32.8	12.0	0.26
K1 ore body floor	2.8	6.73	41.5	16.8	0.26
Floor of K2 ore body	2.7	6.95	41.5	15.3	0.26
Ore body	2.9	9.28	44.2	26.6	0.26
Filling body	2.0	0.50	32.0	0.60	0.25