Am Ind Hyg Assoc J. 1975 Aug;36(8):604-9. doi: 10.1080/0002889758507299.
The 1969 Federal Coal Mine Health and Safety Act established environmental dust standards for underground coal mines. The Act requires that the average concentration of respirable dust in the active workings of a mine be maintained at or below 3.0 mg/m3; and, that effective December 30, 1972, the 3.0 mg/m3 standard be reduced to 2.0 mg/m3. This paper discusses the current status of dust levels in our underground coal mines, the effect of the 2.0 mg/m3 standard on underground dust levels, and associates the current levels with specific operations and occupations. The comparison is made between current levels and those existing prior to December 30, 1972.
1969年的《联邦煤矿健康与安全法》制定了地下煤矿的环境粉尘标准。该法案要求煤矿作业区的可吸入粉尘平均浓度保持在3.0毫克/立方米或以下；并且，自1972年12月30日起，3.0毫克/立方米的标准降至2.0毫克/立方米。本文讨论了我国地下煤矿粉尘水平的现状、2.0毫克/立方米标准对地下粉尘水平的影响，并将当前水平与特定作业和职业联系起来。同时将当前水平与1972年12月30日之前的水平进行了比较。
