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目的：探讨煤矿工伤事故发生的时间分布规律，以便采取相应预防对策。方法：选择平顶山矿务局有代表性的三个矿，对１０年间（１９８７．１．１～１９９６．１２．３１）的全部工伤职工作回顾性调查，以年份、季节、月份、班次和２４ｈ制时间为指标，分析其规律。结果：工伤事故在１９８７～１９９４年发生呈下降趋势，１９９５～１９９６年又有回升；一年中以秋季多发，月份大部分集中在７～１０月份；班次以中班工伤事故多发，且２４ｈ中９～１０点为事故发生高峰。结论：一年间秋季或７～１０月份、中班（尤其是９～１０点）工伤事故多发。
Objective: To explore the time distribution pattern of industrial accidents in coal mine in order to take appropriate preventive measures. Methods: We selected three representative mines of Pingdingshan Mining Bureau and conducted a retrospective survey of all occupational injuries in the 10 years (1987.1.1 ~ 1996.12.31). Year, season, month, shift and 24h System time as an indicator, analyze its laws. Results: The accident rate of occupational injuries decreased from 1987 to 1994 and rose again from 1995 to 1996. In autumn, most of the accidents occurred in July and October. 9 to 10 points for the accident peak. Conclusion: In the autumn of one year or from July to October, the work-related accidents in the middle class (especially from 9 to 10) were frequent.