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影响尘肺发生发展的外因是在生产条件下,空气中粉尘浓度和粉尘中二氧化矽的含量。粉尘的种类相同时,粉尘浓度就成了尘肺发生发展的主要因素。为了阐明这个问题,加强贯彻执行“预防为主”的方针,在浙江东风莹石矿,对该矿粉尘浓度与尘肺两者之间的关系,进行了十年的动态观察,现将观察结果报导如下:
The external factors that affect the development of pneumoconiosis are the dust concentration in the air and the content of silica in the dust under production conditions. When the type of dust is the same, dust concentration has become the main factor in the development of pneumoconiosis. In order to elucidate this issue and to strengthen the implementation of the principle of “prevention first”, a dynamic observation of the relationship between the mine dust concentration and pneumoconiosis was carried out at Zhejiang Dongfeng Ying Qu Mine, and now the observation results are reported as follows: