Study on the Allowable Exposure Time of Temporary Goaf in the Open Stope and Backfill Mining Method with Large Structure Parameters

Table 5

Calculation results of creep parameters of the filling body.

Specimens	Creep stress σ (MPa)	EB (GPa)	EK (GPa)	ηK (GPa.d)	ηB (GPa.d)
Yc6-7	1.00	0.63	1.57	0.068	29.57
Yc6-8	1.34	0.64	3.06	0.14	56.83
Yc6-9	1.67	0.62	7.79	0.39	72.42
Yc6-10	2.00	0.57	11.23	0.60	89.50