| 煤粒筛分现象与粒度分布特性的试验研究 |
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| 引用本文： | 刘清泉,刘嫄嫄,杜凯,郑思文,朱子斌. 煤粒筛分现象与粒度分布特性的试验研究[J]. 中国安全科学学报, 2022, 0(2): 130-138 |
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| 作者姓名： | 刘清泉 刘嫄嫄 杜凯 郑思文 朱子斌 |
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| 作者单位： | 中国矿业大学安全工程学院;中国矿业大学煤矿瓦斯治理国家工程研究中心;枣庄矿业（集团）有限责任公司通防部 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助(2021YCPY0110,2018QNA01)。 |
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| 摘 要： | 在求解煤的物性参数时,为探究煤粒平均粒径对参数求解的影响,以5种不同粒级的煤粒为研究对象,系统研究筛分现象和粒度分布;以煤粒瓦斯扩散系数求解为例,分析算术平均值、体积加权平均体积粒径对计算结果的影响.研究结果表明:煤颗粒在筛分过程中会出现特殊分选现象,目标粒级粒度分布仅占真实粒度分布的33.37％～49.32％;算术平...
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| 关 键 词： | 煤粒筛分 粒度分布 平均粒径 扩散系数 解吸 |
Experimental study on sieving phenomenon and particle size distribution characteristics of coal particles |
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| LIU Qingquan,LIU Yuanyuan,DU Kai,ZHENG Siwen,ZHU Zibin. Experimental study on sieving phenomenon and particle size distribution characteristics of coal particles[J]. China Safety Science Journal, 2022, 0(2): 130-138 |
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| Authors: | LIU Qingquan LIU Yuanyuan DU Kai ZHENG Siwen ZHU Zibin |
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| Affiliation: | (School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;National Engineering Research Center for Coal Gas Control,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Communication and Defense Department,Zaozhuang Mining(Group)Co.,Ltd.,Zaozhuang Shandong 277000,China) |
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| Abstract: | In order to investigate influence of mean particle sizes on the calculation of coal's physical property parameters,screening phenomenon and particle size distribution of coal particles at five fractions were studied.Then,with solution of coal gas diffusion coefficient as an example,effects of arithmetic mean and volume-weighted mean volume particle size on calculation results were analyzed.The results show that special separation phenomenon occurs during screening process of coal particles,and distribution of target fractions only accounts for 33.37%—49.32%of real size distribution.And arithmetic mean makes all sieved particle sizes within the target fraction,which causes a large error in calculating the diffusion coefficient.Compared it with the volume-weighted average volume size which considers characteristics of particle size distribution,the difference of diffusion coefficient between the two solutions is up to 43.42%. |
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| Keywords: | coal particle sieving particle size distribution mean particle size diffusion coefficient desorption |
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