Research Article
Coal Mine Safety Evaluation Based on Machine Learning: A BP Neural Network Model
Table 2
Scoring standard for coal mine safety evaluation.
| | Safety grade | Safety classification | Evaluation score | Characterization state |
| | 1 | Intrinsic safety I | [90,100) | Safe coal mine (ideal) | | 2 | Intrinsic safety II | [80,90) | Basic safety (good) | | 3 | Intrinsic safety III | [70,80) | Coal mine with poor safety, early warning status (general) | | 4 | Intrinsic safety IV | [60,70) | Unsafe coal mine, medium alarm status (poor) | | 5 | Failure to achieve intrinsic safety | [0,60) | Unsafe coal mine, heavy alarm state (bad) |
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