CAJ | 학술논문

　　为了研究不同质量的点火具自身爆炸特性以及对粉尘爆炸下限浓度的影响，采用20 L球爆炸测试装置对不同质量的点火具进行了试验，与理论计算结果进行了对比；并对过200目筛、中位径为32μm的煤粉进行了爆炸下限浓度研究。结果表明：试验结果和理论计算结果基本一致，爆炸压力随点火具质量的增加而呈现线性上升；随着点火具质量的增加，煤粉的爆炸压力逐渐增加，爆炸下限浓度逐渐降低，当点火具质量由0．24 g增加至2．40 g时，煤粉的爆炸下限浓度由40～50 g/m3下降到30～40 g/m3，引爆煤粉的危险性进一步增大。
　　위료연구불동질량적점화구자신폭작특성이급대분진폭작하한농도적영향，채용20 L구폭작측시장치대불동질량적점화구진행료시험，여이론계산결과진행료대비；병대과200목사、중위경위32μm적매분진행료폭작하한농도연구。결과표명：시험결과화이론계산결과기본일치，폭작압력수점화구질량적증가이정현선성상승；수착점화구질량적증가，매분적폭작압력축점증가，폭작하한농도축점강저，당점화구질량유0．24 g증가지2．40 g시，매분적폭작하한농도유40～50 g/m3하강도30～40 g/m3，인폭매분적위험성진일보증대。
In order to study intrinsic explosibilty of igniters in different quantity and the influence on minimum explo -sive concentration of coal dust , 20 L sphere explosion test units were employed , and then the experiment results were com-pared with the theoretical calculations .Moreover, coal powders of less than 200 mesh, whose median diameters were 32μm, were used as dust samples for minimum explosive concentration evaluation .The experimental results show agreement with the theoretical calculations .The explosion pressure has a linear increase with the increasing of ignition quality .With the ignition quality increasing , the explosion pressure of coal dust increases and the minimum explosive concentration de -creases conversely.When the ignition quantity increased from 0.24g to 2.40g, the minimum explosive concentration re-duces from 40-50 g/m3 to 30-40 g/m3 , which indicated that the risk of such dust was further increased .