Research Article
Experimental Study on Low-Strength Similar-Material Proportioning and Properties for Coal Mining
| Compressive strength/kPa | Elasticity modulus/kPa | Level | Sand-binder ratio (A) | Fly ash : gypsum (B) | Level | Sand-binder ratio (A) | Fly ash : gypsum (B) |
| 1 | 72.386 | 40.560 | 1 | 2568.502 | 929.036 | 2 | 62.297 | 48.374 | 2 | 2287.891 | 1578.123 | 3 | 51.913 | 61.240 | 3 | 2028.174 | 2604.192 | 4 | 43.475 | 79.897 | 4 | 1799.980 | 3573.197 | Range | 28.911 | 39.337 | Range | 768.522 | 2644.161 |
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