Research Article
A Study of Safety Coefficient Determination and Support Parameter Optimization Based on Vulnerability Preevaluation
Table 20
The weights of the evaluation indexes.
| Layer-1 | Weight | Layer-2 | Weight | Layer-3 | Weight |
| Characteristics of the surrounding rock | 0.31 | Surrounding rock integrity | 0.35 | | | Strength of the surrounding rock | 0.35 | Roof | 0.35 | Rib | 0.4 | Floor | 0.25 | Roof rock types | 0.1 | | | Gateway type | 0.1 | Dip angle of the surrounding rock | 0.1 | Stress condition | 0.4 | Section parameter | 0.1 | Section type | 0.5 | Section size | 0.5 | Construction disturbance | 0.35 | Degree | 0.5 | Time | 0.5 | Geological structure | 0.3 | | | Buried depth | 0.1 | Major horizontal principal stress | 0.15 | Value | 0.4 | Angle | 0.6 | Geological environment | 0.1 | Underground water | 0.5 | | | Underground temperature | 0.5 | Service condition | 0.19 | Inspection and maintenance | 0.2 | | | Service time | 0.8 |
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