Effect-Assessment For Occupational Hazard Control In Construction Project Of A Coal Mine

ObjectiveIn order to implement the relevant of national laws, regulations, rules and standards of occupational health,to control or eradicate occupational diseases in the fountainhead, to prevent and cure the occupational disease and protect the laborers' health, we develop the effect-assessment for occupational hazard control in construction project.From that,we clear the occupational hazard factors of this project, analyze its harm degree and effection on the labor's health, evaluate the facility for control occupational hazard and its effect. Moreover,we throw out suggestions about measures for control occupational disease on those unsatisfactory systems or units.Also it can offer scientific evidence for completion acceptance of health administration about facility for control occutional hazard and offer the evidence for day-to-day management about prevention and cure the occupational disease of the development organization.Method1. Occupational health site investigation:by the occupational health investigation, we could understand the process of production engineering and situation about test run, determine the occupational hazard factors existing in the productive process and working environment. In the while,we could understand how they carry out the hygienic engineering measures for occupational disease control and prevention and how to set up the occupational regulatory authority. 2. Detection and test:in full production rates, we make the spot detection and laboratory test about occupational hazard factors existing in the workplace,such as dust, chemical toxicant and physical factors, also,analysis and evaluate the concentration or strength about those occupational hazard factors.Result1. Dust:The content of free silicon dioxide of four operating locations' dust are all below 10%.We test PC-TWA of 5 operators those who expose coal dust in working process, among that,4 operators' exposure level is qualified, the other one is unqualified.We test PC-STEL of six fixed-point operation of respirable dust, all of them meet the GBZ.We detect PC-STEL of 25 fixed-point operation dust, including 23 operation points of coal-dust,18 is eligible, the other 5 is unqualified, percent of pass is 78.3%; 2 operation points of welding fume, and all are qualified.We determinate the distribution of particulate of 5 operation points. The dispersity is different, and the harm to human body and the dedusting method which be taken is also different. The greater the dispersity, the greater the harm to human body.The respirable dust (<5μm) in this detection of the five operating points is at between 42.6%～51.8%,which can be reached deep respiratory tract and pulmonary alveolus, and these dust harmfulness is bigger.2.Chemical hazardous agents:We totally detected concentration of 1 manganese and its compounds,6 CO,6 H2S,2 SO2,2 benzene,2 toluene and 2 xylene in the air of workplace, all of them met the GBZ.3.Noise:Noise intensity of 13 types of work in production in this evaluation was tested, and 99 noise data were measured. Expect for the noise level of the operator of jigger hand picked refuse was overproof,the others were lower than the GBZ.4. Illuminance:We detected 4 illuminance-exposed working surface,3 of them were lower than the GBZ.5. Power frequency electric field:We totally detected 12 Power frequency electric field-exposed working surface, all of them met the GBZ. 6. Microclimate:The temperature and relative humidity tested in control room were suitable. the air conditioning were installed in each control room. Displacement ventilation indoor relies mainly on the air conditioning system. Moreover,all air velocity were not measured.ConclusionThrough the occupational health investigation, the detection of occupational hazard factors in the air of workplace, quantitative calculation and qualitative analysis, it can be thought that the effect of occupational hazard control in construction project has implemented the relevant of national laws, regulations and standards of occupational health. But it need to further strengthen and perfect measures of dust prevention, sound insulation and soundproofing. Also it need to be increased illuminane of some workplaces.