Table 1 The continuous grading of coal gangue.
From: Uniaxial compressive strength of cemented coal gangue backfill based on response surface methodology
Fine gangue | Medium gangue | Large gangue | ||
|---|---|---|---|---|
(− 4.75 mm) | (+ 4.5~− 9.5 mm) | (+ 9.5~− 13.2 mm) | (+ 13.2~− 16 mm) | (+ 16~− 19 mm) |
30.00% | 31.50% | 21.00% | 10.50% | 7.00% |
35.00% | 29.25% | 19.50% | 9.75% | 6.50% |
40.00% | 27.00% | 18.00% | 9.00% | 6.00% |
45.00% | 24.75% | 16.50% | 8.25% | 5.50% |
50.00% | 22.50% | 15.00% | 7.50% | 5.00% |
