Research Article
Study on Damage Model and Damage Evolution Characteristics of Backfill with Prefabricated Fracture under Seepage-Stress Coupling
Table 1
Chemical composition of the main raw materials of backfill specimen.
| Major element | Coal gangue (%) | Cement (%) | Fly ash (%) |
| SiO2 | 56.1 | 22.95 | 52.35 | Al2O3 | 18.6 | 5.32 | 32.60 | Fe2O3 | 4.6 | 3.90 | 2.51 | CaO | 2.34 | 62.58 | 8.13 | MgO | 1.31 | 2.06 | 0.95 | SO3 | 0.12 | 2.33 | 0.51 | LOI | 10.23 | 2.58 | 11.62 |
|
|