Research Article
Influencing Factors’ Analysis of Disturbance Degree of Key Stratum Based on the Response Surface Method
Table 5
Variance results of the regression model.
| Scheme number | Origins | Sum of squares | Freedom | Mean square | F valued | valued |
| 1 (soft) | Model | 2.12 | 9 | 0.2357 | 17.72 | 0.0005 | Mining height | 0.363 | 1 | 0.363 | 27.29 | 0.0012 | Buried depth | 0.1311 | 1 | 0.1311 | 9.85 | 0.0164 | Interlayer spacing | 0.9941 | 1 | 0.9941 | 74.73 | 0.0001 | Residual error | 0.0931 | 7 | 0.0133 | | | Summation | 2.21 | 16 | | | |
| 2 (medium) | Model | 0.8113 | 9 | 0.0901 | 17.7 | 0.0005 | Mining height | 0.1386 | 1 | 0.1386 | 27.22 | 0.0012 | Buried depth | 0.0501 | 1 | 0.0501 | 9.84 | 0.0165 | Interlayer spacing | 0.3802 | 1 | 0.3802 | 74.67 | 0.0001 | Residual error | 0.0356 | 7 | 0.0051 | | | Summation | 0.8469 | 16 | | | |
| 3 (hard) | Model | 0.0684 | 9 | 0.0076 | 17.54 | 0.0005 | Mining height | 0.0038 | 1 | 0.0038 | 8.65 | 0.0217 | Buried depth | 0.0019 | 1 | 0.0018 | 4.15 | 0.0809 | Interlayer spacing | 0.0088 | 1 | 0.0088 | 20.3 | 0.0028 | Residual error | 0.003 | 7 | 0.0004 | | | Summation | 0.0715 | 16 | | | |
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