钨矿矽肺发生发展规律探讨

Trailing the Occurrence and Development of Silicosis in Tungsten Mines

本文就钨矿1960年1月1日至1974年12月31日在册职工32927人中矽肺10449例的发生发展规律进行了研究。结果表明各钨矿粉尘浓度均值已由50年代的18.20mg/M^3降至80年代的2.03mg/m^3,矽肺发病率从60—69年的17—18‰下降至85—89年的4.5‰。矽肺进级时间(可疑矽肺到Ⅰ期),从50—60年代的2—2.9年延长到70—80年代的8.2—9.6年;矽肺Ⅰ期到Ⅲ期的时间也从50—60年代的4.0—6.0年延长到70—80年代的17.7—23.2年。结果证实接尘浓度与矽肺进级呈明显负相关。

Among 32927 tungsten miners employed from 1960 to 1974,10449 developedsilicosis.The courses of their silicosis development were traced.The average at-m ospheric dust concentration dropped from 18.20 mg/ M^3 in 1950s to2.03mg / M^3 in the 80's.The incidence of silicosis decreased from 17-18% in1960s to 4.5% in 1985-1989.Development of silicosis from those with suspi-cious signs to stage Ⅱ longthened from 2-2.9 years in 1950s-60s to 8.2-9.6years in 1970s-80s,and from stage Ⅰ to stage Ⅲ prolonged from 4.0-6.0years to 17.7-23.2 years during the same period.These results indicated thatthe incidence and development of silicosis in negatively related to dust concen-tration exposed to minere.