利用指标气体对治理效果进行分析，确保火区成功启封，保障了矿井的生产安全。

Indication gases were used for the analysis of the control effect, this can ensure the fire area to be successfully opened as well as the safe production in coal mines.

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矿井火区可燃性混合气体爆炸危险性的判断，目前常用单纯的瓦斯爆炸三角形判别法。

Methane explosion triangle method, which is commonly applied to judge the explosion risk of mixed inflammable gases in the mine fire district, considers only the main component gas.

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