京西煤矿粉尘中二氧化硅赋存状态与展布的研究

STUDY ON THE EXISTENCE OF SiO_2 AND DISTRIBUTION OF DUSTS IN JINGXI COAL MINE DISTRICT

矿区粉尘中危害人体健康的核心物质是 SiO_2。SiO_2有两种赋存状态,即游离态SiO_2和结合态 SiO_2,这两种赋存状态的 SiO_2对人体的危害程度不同。本文对京西王平村、大台和门头沟煤矿的研究中得知,三个煤矿的粉尘中均含有游离态 SiO_2和结合态 SiO_2,但二者含量不同。本研究为粉尘的治理提供了科学依据。

Coal and rock dusts produced by tunnelling and hauling operation pollute the working environment,and the workers working in this environment suffer from sihcoses.Therefore it is necessary to get better understanding of the pollutant-SiO_(2) in dust that harms worker's health.SiO+_(2) has two kinds of existences:free state and binding state,In each state,SiO_(2) has different harrm level to man's health. We selected three mines in Jingxi coal district,namely,Wangpingcun,Datai and Mentou- gou anthracite mines.Wangpingcun coal was formed in the Permo-carboniferous period, Datai and Mentougou coal in the Jurassic period.46 samples were collected and analysed. The results are as follows: 1.SiO_(2) in coal and rock dusts in all three mines is in free and binding states,It is found that the Datai mine ranks the first and the Mentougou mine the second in terms of free SiO_(2) content. 2.Free state SiO_(2) in three mines is crystalline,binding state SiO_(2) is in koalinite,illite,etc. 3.Free state SiO_(2) and binding state SiO_(2) in different level,different slot,and different locations of the mines is in different distribution.