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本文引入无量纲爆炸因子αij的概念，利用量纲分析方法，导出煤矿井下包括固体（如煤尘）和气体（CH4、H2等）共同影响下混合物爆炸范围的确定公式。
In this paper, the concept of dimensionless explosion factor αij is introduced, and the formula for determining the explosion range of the mixture under coal mine (including coal dust) and gas (CH4, H2, etc.