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采用吊盘法现场收集巷道不同距离处底板、顶板及两帮的沉积煤样,在实验室用显微镜法对各采样点的粉尘分散度进行了测定,结果表明:在2202风巷,顶板处各粒径粉尘的分散度随着远离工作面有升有降,总体趋势是<2μm粉尘的数量远高于其他粒径的粉尘,>10μm粉尘所占比例最低;2202瓦斯巷<2μm粉尘所占比例较高,<5μm粉尘所占比例均在90%以上;22采区回风巷各测点粉尘分散度变化不大,分散度不高;2203掘进巷粉尘分散度不高,<5μm粉尘所占比例80%左右;1312下运掘巷各测点粉尘分散度总体变化不大,分散度较高。
The hanging plate method was used to collect the coal samples of floor, roof and two gangues at different distances in the roadway. The dust dispersion degree at each sampling point was measured by microscope in the laboratory. The results showed that in 2202 airways and roof The dispersion of particle size dust increases or decreases as the distance from the working face increases. The overall trend is that <2μm dust is much higher than other particle sizes,> 10μm dust is the lowest, and 2202 Gas Lane <2μm dust proportion The proportion of <5μm dust is more than 90%; the dust dispersion degree of each measuring point in return air lane of No.22 area is not changed much and the degree of dispersion is not high; the dust dispersion degree of 2203 roadway is not high, The proportion is about 80%; the dust dispersion degree at all measuring points in the roadway under 1312 has little change and the dispersion degree is higher.