许春松、吴萍(贵州省冶金防护研究所职业病研究室)报道:对该矿矽肺发病特点等方面进行了回顾性调查分析。结果表明,1.该矿1958年以来井下粉尘年平均浓度为1.4～6.4mg/m~3;游离SiO_2含量为14.5～30.6％;分散度,2μm以下占45.5～48.9％,2～5μm占45.4～48.9％,5μm以上占4.1～7.0％。2.354例矽肺病人,其中解放前井下工占65.3％,1950～1957年接尘者占29.9％;1958～1962年接尘者占4.8％,1962年以来的井下 Xu Chunsong, Wu Ping (Guizhou Institute of Metallurgical Protection occupational disease laboratory) reported: the characteristics of silicosis of the mine and other aspects of a retrospective investigation and analysis. The results show that the annual average dust concentration of underground mine is 1.4 ~ 6.4mg / m ~ 3 since 1958; the content of free SiO_2 is 14.5 ~ 30.6%; the dispersion is 45.5 ~ 48.9% under 2μm, 45.4 ~ 45% ~ 48.9%, 5 ~ m above accounted for 4.1 ~ 7.0%. 2.354 cases of silicosis patients, including 65.3% before the liberation of the underground workers, from 1950 to 1957, dust accounted for 29.9%; 1958 ~ 1962, dust accounted for 4.8% since 1962 downhole