This paper sets up reliability function of repairable series system by analyzing thestructure of preduction system in mechanized face,ANDit reaches the conclusion by practical cal-cucation.

• 通过对高档普采工作面生产系统结构分析，构造简化马尔可夫图及可修复串联系统可靠性指标函数，并通过实例计算，得出分析结论。