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

Table 7

Recommended creep parameters of the filling body.

Specimens	Stress level (% R)	EB (GPa)	EK (GPa)	ηK (GPa.d)	ηB (GPa.d)
Yc6-7	30	0.50	1.26	0.054	23.66
Yc6-8	40	0.51	2.45	0.11	45.46
Yc6-9	50	0.50	6.23	0.31	57.94
Yc6-10	60	0.46	8.98	0.48	71.60