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

Table 3

Uniaxial creep statistics of the filling body specimens.

Specimens	Stress level(% R)	Creep stress(MPa)	Predetermined load(kN)	Initial strain(%)	Final strain(%)	Creep strain(%)	Creep time(h)
Yc6-7	30	1.00	2.285	0.16	0.191	0.031	200
Yc6-8	40	1.34	0.071	0.21	0.252	0.042	200
Yc6-9	50	1.67	3.799	0.27	0.321	0.051	200
Yc6-10	60	2.00	4.530	0.35	0.545	0.195	196