Numerical Simulation of the Stress Field in Repeated Mining of Coal Seams Based on In Situ Stress Measurement

Table 6

Mechanical parameters of the rock mass in the caving zone.

Lithology	K (GPa)	G (GPa)	γ (kg·m^−3)	C (MPa)	φ (°)	σtm (MPa)
22# roof	14.08	10.56	1800	0.001	35	0
42# roof	9.56	7.17	1900	0.001	40	0