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

Table 2

Analysis of influential factors of rock creep deformation on the stress distribution of backfill.

Factors	Stope depth (m)	Lateral pressure coefficient η	Horizontal stress ratio λ	Creep time of rock mass t (days)	Young’s modulus of backfill Eb (MPa)	Delay time of backfill td (days)
Stope depth	500	2	1	30	300	1
	1000	2	1	30	300	1
	1500	2	1	30	300	1
Lateral pressure coefficient η	1000	0.5	1	30	300	1
	1000	1	1	30	300	1
	1000	2	1	30	300	1
Horizontal stress ratio λ	1000	2	0.5	30	300	1
	1000	2	1	30	300	1
	1000	2	2	30	300	1
Creep time of surrounding rock mass t	1000	2	1	30	300	1
	1000	2	1	60	300	1
	1000	2	1	90	300	1
Young’s modulus of backfill Eb	1000	2	1	30	30	1
	1000	2	1	30	300	1
	1000	2	1	30	900	1
Delay time of backfill td	1000	2	1	30	300	0
	1000	2	1	30	300	1
	1000	2	1	30	300	14

Note. Elastic modulus for rock is found to be 8.4 GPa and Poisson’s ratio of rock and backfill is 0.29 and 0.33, respectively.