矽砂尘是对人体危害较大的高含矽量粉尘,搞好防尘工作是保证乡镇矽砂矿健康发展的需要。根据乡镇矽砂矿的特点和我们调查的体会,采取下列防尘措施可以达到花钱少、防尘效果显著的目的,供有关人员参考。乡镇矽砂矿主要有取坯、破碎、炒砂三个接尘工种,各工种的具体防尘措施如下:一、取坯:取坯一般为露天开采,作业场所的粉尘浓度与气候密切相关。阴雨天或久雨初晴时,土石潮湿,几乎不产生粉尘。但久晴不雨时,粉尘浓度较高,最高时游离SiO_2的含量能达到68毫克立方米,超过国家标准34倍。此时,在工作面坚持先洒水、后作业的措施,可明显降低环境粉尘浓度。二、破碎:现在一般采用两次机械破碎。其最好的防尘措施是采用湿式流水作业。据我们调查的 Silica sand dust is a high risk of human body high silicon content of dust, do a good job of dust prevention is to ensure the healthy development of township silicon ore needs. According to the characteristics of township and silica sand survey and our experience, the following dust-proof measures can be achieved with less money, the effect of significant anti-dust for the reference of the relevant personnel. Township silicon sand mine mainly from the billet, broken, frosted three dust-type workers, the specific dust-proof measures for the various types of work are as follows: First, take the blanks: take the blanks generally open-pit mining, workplace dust concentration and climate are closely related. When the rainy days or early rain are clear, the soil is wet and produces little dust. However, when the rain is sunny and the dust concentration is high, the maximum content of free SiO 2 can reach 68 mg cubic meters, 34 times more than the national standard. At this point, in the face adhere to the first sprinkler, after the operation of the measures can significantly reduce the concentration of environmental dust. Second, broken: Now generally use two mechanical crushing. Its best dust-proof measure is to use wet running water. According to our investigation