Backfill rolling test blocks and working condition combinations
| Test site | Backfill material | Lift thickness (cm) × layers | Rolling passes | Controlled moisture content: % | |
|---|---|---|---|---|---|
| I | A | Aeolian sand | 30 × 1 | 2, 4, 6, 8, 10 | Not watered |
| I | B | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | wopt + 5 |
| I | B | Sandstone–gypsum | 15 × 1 | 2, 4, 6, 8, 10 | wopt + 5 |
| I | C | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | wopt + 5 |
| I | C | Sandstone–gatch | 15 × 1 | 2, 4, 6, 8, 10 | wopt + 5 |
| I | D | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | wopt + 5 |
| I | D | Sandstone | 15 × 1 | 2, 4, 6, 8, 10 | wopt + 5 |
| II | A | Aeolian sand | 50 × 1 | 4, 6, 8, 10, 12 | Not watered |
| II | B | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | wopt + 5 |
| II | B | Sandstone–gypsum | 30 × 1 | 4, 6, 8, 10, 12 | wopt + 5 |
| II | C | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | wopt + 5 |
| II | C | Sandstone–gatch | 30 × 1 | 4, 6, 8, 10, 12 | wopt + 5 |
| II | D | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | wopt + 5 |
| II | D | Sandstone | 30 × 1 | 4, 6, 8, 10, 12 | wopt + 5 |
| Test site | Backfill material | Lift thickness (cm) × layers | Rolling passes | Controlled moisture content: % | |
|---|---|---|---|---|---|
| I | A | Aeolian sand | 30 × 1 | 2, 4, 6, 8, 10 | Not watered |
| I | B | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | |
| I | B | Sandstone–gypsum | 15 × 1 | 2, 4, 6, 8, 10 | |
| I | C | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | |
| I | C | Sandstone–gatch | 15 × 1 | 2, 4, 6, 8, 10 | |
| I | D | Aeolian sand | 30 × 3 | 2, 4, 6, 8, 10 | |
| I | D | Sandstone | 15 × 1 | 2, 4, 6, 8, 10 | |
| II | A | Aeolian sand | 50 × 1 | 4, 6, 8, 10, 12 | Not watered |
| II | B | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | |
| II | B | Sandstone–gypsum | 30 × 1 | 4, 6, 8, 10, 12 | |
| II | C | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | |
| II | C | Sandstone–gatch | 30 × 1 | 4, 6, 8, 10, 12 | |
| II | D | Aeolian sand | 50 × 3 | 4, 6, 8, 10, 12 | |
| II | D | Sandstone | 30 × 1 | 4, 6, 8, 10, 12 | |
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