The otherness of fatality rate in every calculated unit interior and between the units applying different mining technologies are analyzed, a dualistic analysis calculation model is established to calculate fatality rate per million man hour and per million tons adopting different mining methods like mechanized and non mechanized mining methods or the like.
通过分析各统计单元内部、单元间的不同采煤工艺死亡率的差异性,建立二元分解计算模型,计算机械化采煤与非机械化采煤等不同工艺的百万工时死亡率和百万吨死亡率。