Research Article
Study on the Allowable Exposure Time of Temporary Goaf in the Open Stope and Backfill Mining Method with Large Structure Parameters
Table 1
Conventional experiment results of the specimens.
| Specimens | Instantaneous uniaxial compression strength, R (MPa) | Axial ultimate strain, ε (%) | Remarks |
| Iron ore | 163.59 | 0.52 | Quartz specularite | Filling body | 3.34 | 0.58 | Cement-sand ratio of 1 ∶ 6 |
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