Research Article
Assessment of Risk Tendency of Coal Bursting Pressure in Deep Outburst Seam
Table 8
Classification of mining stress concentration.
| Evaluation index | Classification | Standard | Scale |
| Stress concentration factor in mining | I | Reasonable mining sequence | 1 | No pillar of coal near the working face | All cavitation effects | Reasonable mining sequence | II | There are a few pillars of coal near the working face | 3 | The caving method is generally effective or the filling method is adopted | Unreasonable mining sequence | III | There are many coal pillars near the working face | 5 | Coal pillar support method |
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