作者设计了粉尘爆炸压力测定装置。实验说明适当控制烟煤含水量可以降低爆炸强度,延长爆炸延续时间,并证实不同煤种均存在一个界限浓度,有些煤种十分明显,而有些煤种范围较宽。对大同烟煤不同粒度煤粉实验表明,应选择合适粒度范围,既减小爆炸的危险,又燃烧得比较完全。 The author designed a dust explosion pressure measuring device. Experiments show that proper control of water content of bituminous coal can reduce the intensity of explosion and prolong the duration of the explosion. It is also confirmed that there is a limit concentration for different coal species, some coal types are obvious, while some coal types have a wider range. Experiments on Datong bituminous coal with different particle sizes show that the proper range of particle size should be chosen, which not only reduces the risk of explosion but also burns completely.