A Solution to the Time-Dependent Stress Distribution in Suborbicular Backfilled Stope Interaction with Creeping Rock

Table 1

Input parameters of the numerical model and analytical model.

Parameters	Analytical results	Numerical results	Unit
Rock material-elastic modulus Er	8.4	8.4	GPa
Rock material-Poisson ratio r	0.29	0.29	1
Mine backfill-elastic modulus Eb	0, 30, 300, 900	0, 30, 300, 900	MPa
Mine backfill-Poisson’s ratio b	0.33	0.33	1
Lateral earth pressure p	10	10	MPa
Lateral earth pressure ratio λ	1	1	1
Radius of circular hole a	3	3	m
Radius of point P1 position r	3.02608	3.02608	m

Note.denotes that it is important to consider the relationship of the difference between the coordinates of the unit stress and the node displacement in the numerical model when comparing with the numerical simulation. Therefore, the r value here should be the coordinates of the center point of the unit in the numerical model since it is at these coordinates that the calculated data can be compared with the theoretical solution.