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为研究煤尘变质程度对其爆炸危险性的影响,将煤尘划分为无危险性、危险性较弱、危险性一般、危险性较强4个等级,建立爆炸危险等级的模糊结构元综合决策模型。选取40种煤样进行煤质分析试验和超压、温度、火焰传播特性、粒径分散度测试试验,以此构建煤尘爆炸危险等级决策指标体系。将三角结构元引入所建模糊综合决策模型,通过对模糊指标值函数与模糊极大函数的加权海明距离排序,实现不同煤质的煤尘爆炸危险等级决策。结果表明:未变质煤尘的爆炸危险等级总体较高,高变质煤尘的爆炸危险等级普遍较低。爆炸危险等级随变质程度的增大呈下降趋势。
In order to study the influence of the degree of coal dust detonation on its explosion risk, the coal dust was divided into four levels: non-hazardous, low-risk, dangerous and dangerous. The comprehensive decision-making of fuzzy structure element was established model. Select 40 kinds of coal samples for coal quality analysis and overpressure, temperature, flame propagation characteristics, particle size dispersion test, in order to build a coal dust explosion hazard level decision index system. The triangular structural element is introduced into the fuzzy comprehensive decision making model, and the coal mine dust explosion hazard level decision of different coal quality is achieved through the weighted Heming distance of the fuzzy index value function and the fuzzy maximum function. The results show that the explosion hazard level of unmodified coal dust is generally high, and the explosion risk level of high metamorphic coal dust is generally low. Explosion hazard level with the degree of deterioration of a declining trend.