PARTICLE-SIZE DISTRIBUTIONS IN UNDERGROUND COAL-MINES
PARTICLE-SIZE DISTRIBUTIONS IN UNDERGROUND COAL-MINES
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DOI：
10.1080/15298668791384508
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发表时间：
1987-02-01
期刊：
影响因子：
--
通讯作者：
WHEELER, RW
中科院分区：
文献类型：
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作者：
BURKHART, JE;MCCAWLEY, MA;WHEELER, RW
本文报道了NIOSH为确定煤矿井下颗粒粒度分布而进行的采样程序的结果。该方案利用了新开发的能够与个人采样泵一起操作的级联冲击器。在三个州的10个连续开采段的选定区域采集了粒度分布样本。用质量频率分布绘制的结果表明，在远离连续矿机作业的区域可能存在双峰分布。初级规模模式约为17亩。M和约5亩的二级规模模式。在研究的10个矿井中，M的测量值一致。
This paper reports the results of a sampling program undertaken by NIOSH to determine the particle size distributions in underground coal mines. The program made use of newly developed cascade impactors capable of being operated with personal sampling pumps. Particle size distribution samples were collected at selected areas in 10 continuous mining sections in three states. Results plotted as mass frequency distributions indicate that a bimodal distribution may exist in areas away from the operations of the continuous miner. A primary size mode of about 17 .mu.m and a secondary size mode of about 5 .mu.m were measured consistently throughout the 10 mines studied.