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Experimental data revealing explosion characteristics of methane, air, and coal mixtures

机译:揭示甲烷,空气和煤炭混合物的爆炸特性的实验数据

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Whenever air and gases mix with pulverised coal, explosions are possible. Such explosions constitute a primary category of safety concerns during coal bed methane mining. This study investigated the explosion parameters and characteristics of methane-air-coal dust mixtures by using an XKWB-1 sealed explosion system. Maximum explosion pressure (P-max), maximum explosion pressure rise rate (dP/dt)(max), and explosion index (K) were recorded and calculated. Findings showed that relative to the maximum explosion pressure of an air-methane gas mix Pmax-G, that of a gas-dust mixture Pmax-GD was elevated when a 7.0 vol% methane-air mixture coexisted with 500.0 g m(-3) of coal dust in the explosion. Pmax-GD decreased as C-G increased and increased as V-ad increased for a methane-air-coal dust mixture. Both Pmax-GD and (dP/dt)(max-GD) increased first, but were diminished with an increase in C-D. The C-opt values of five coal samples of HC, KZD, DFS, TC, and YMZ were 400.0, 500.0, 500.0, 500.0, and 600.0 g m(-3), respectively. Based on the coal dust explosion pathways, the effects of coal dust volatility on the explosion characteristics were analysed. Finally, with respect to 7.0 vol% methane, the data showed that the explosion index of a gas K-g was consistently lower than the explosion index of a gas-dust mixture K-m; that is, K-g < K-m.
机译:每当空气和气体与煤粉混合时,爆炸都是可能的。这种爆炸构成了煤层采矿过程中的安全问题的主要类别。本研究通过使用XKWB-1密封爆炸系统调查了甲烷 - 空气粉尘混合物的爆炸参数和特征。记录和计算最大爆炸压力(P-MAX),最大爆炸压力上升速率(DP / DT)(MAX)和爆炸指数(K)。结果表明,相对于空气 - 甲烷气体混合物的最大爆炸压力pmax-g,当用500.0克(-3)的7.0Vol%甲烷 - 空气混合物时,升高了气体混合物Pmax-Gd的升高煤尘在爆炸中。随着甲烷 - 空气粉尘混合物的V-AD增加,PMAX-GD随着C-G的增加而增加,随着V-AD增加而增加。 PMAX-GD和(DP / DT)(MAX-GD)首先增加,但随着C-D的增加而降低。 HC,KZD,DFS,TC和YMZ的五个煤样的C- opt值分别为400.0,500.0,500.0,500.0和600.0g m(-3)。基于煤尘爆炸途径,分析了煤尘挥发性对爆炸特性的影响。最后,关于7.0体积%的甲烷,数据显示,气体K-G的爆炸指数始终低于储气混合物K-M的爆炸指数;也就是说,k-g

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    《RSC Advances》 |2019年第42期|共11页
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  • 正文语种 eng
  • 中图分类 化学;
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