Research Article
Optimal Proportion of Similar Materials and Rockburst Tendency of White Sandstone
Table 6
Analysis of the extreme difference in tensile strength of various factors covered by the study.
| Factor level | (A) Quartz sand (%) | (B) Iron powder (%) | (C) Plaster : cement | (D) Sand size (mm) |
| I1 | 2.51 | 2.51 | 2.42 | 2.53 | I2 | 2.50 | 2.60 | 2.47 | 2.50 | I3 | 2.36 | 2.42 | 2.47 | 2.45 | I4 | 2.31 | 2.15 | 2.31 | 2.20 | Range | 0.21 | 0.45 | 0.16 | 0.33 |
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