Nonlinear Creep Model of Deep Gangue Backfilling Material and Time-Dependent Characteristics of Roof Deformation in Backfilling Mining

Table 1

Parameters of fractional Poynting-Thomson model.

(MPa)	(MPa)	(MPa)	(MPa·min)
5.0	3.1	0.56	44.67	0.21	0.99
10.0	3.97	0.74	98.96	0.19	0.99
15.0	4.86	1.13	68.21	0.11	0.99
20.0	5.75	1.25	100.00	0.11	0.99