Research Article
Service Risk Evaluation of the General Contract for Coal Mine Production and Operation: Case Study at Shendong Jinjie Coal Mine in China
Table 3
Risk probability classification standard.
| Level | Description | Probability |
| 1 | Improbable | Once every ten years or more | 2 | Remote | Once every five years-ten years | 3 | Rare | Once every five years | 4 | Probable | Once a year | 5 | Frequent | Multiple times a year |
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