五建公司包括井建、土建、安装、机械等专业单位,现有接尘工人1468人,占生产工人的29.4％。主要工种是:(1)接触水泥的有混凝土工、灰工及喷浆工(井下)等;(2)接触粘土、砂土的有推土、挖土、装载、铲运等机手及运土司机;(3)、接触电焊烟尘的有手把电弧焊工;(4)铸造为配砂、造型、清砂、熔化工;(5)井建为风钻、爆炮、支柱、装岩、运输工等。通过现场卫生学调查,了解不同类型粉尘作业的生产工艺及主要工种,并对其生产环境历年来的粉尘浓度(滤膜重量法)、分散度(醋酸酊醋法)、游离二氧化矽含量(焦磷酸重量法)测定的资料, Five construction companies, including well construction, civil engineering, installation, machinery and other specialized units, the existing dust-absorbing workers 1468 people, accounting for 29.4% of production workers. The main types of work are: (1) concrete workers, gray workers and shotcrete workers (underground) who come into contact with cement; (2) machine tools such as earth moving, excavation, loading and shovel contacting with clay and sand Soil driver; (3) Contact with welding fumes have hand arc welder; (4) Casting with sand, modeling, sand cleaning, melting chemical; (5) Well built as a pneumatic drill, cannon, pillar, rock loading, transportation Work and so on. Through the on-site hygiene survey, we know the production process and main types of work of different types of dust, and analyzed the dust concentration (membrane weight method), dispersion (acetic acid tincture and vinegar method), free silicon dioxide content Pyrophosphate gravimetric method) to determine the data,