Table 1 Test scheme for cyclic loading and unloading of combination samples.

From: Experimental study on loading combination of filling body and surrounding rock

Combination type

Lithology

Height ratio

Lower cycle load(kN)

Loading and unloading rate(kN/s)

Maximum additional load per cycle (kN)

SM-FL

SM, FL

2:3, 1:1, 3:2

6

0.05

1

FL-M

FL, M

2:3, 1:1, 3:2

6

0.05

1

SM-FL-M

SM, FL, M

1:2:2, 3:4:3, 2:2:1

6

0.05

1

SM-FL + C-M

SM, FL, C, M

1:1:1:2, 3:2:2:2, 2:1:1:1

6

0.05

1