Effect of Compressive Behaviours of Tail Salt Filling Materials on Roof Deformation in Potash Mine

Table 3

Filling-mining mass ratios under various initial loading stresses.

Initial loading stress (MPa)	0.5	1.0	1.5	2.0	2.5	3.0
Bulk capacity (kN·m^−3)	22.67	23.37	23.99	24.81	25.59	26.32
Filling-mining ratio after compaction	1.09	1.12	1.15	1.19	1.23	1.26
Strain after compaction under 8.5 MPa	0.18	0.17	0.16	0.13	0.12	0.11