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目的确定北京市凤山矿生产过程中的职业病危害因素及其危害程度,并确定职业病防护设施和职业卫生管理措施的效果。方法采用职业卫生检测法、职业卫生现场调查法、职业健康检查、职业病危害作业分级等方法进行职业病危害现状评价。结果工作场所中石灰石粉尘的8 h时间加权平均浓度为:呼尘0.09~0.39 mg/m3,总尘0.16~1.01 mg/m3,满足国家职业卫生接触限值要求。碎运破碎机工人8 h等效声级为93.6 dB(A),噪声超标;其他工种的8 h等效声级满足噪声国家职业接触限值的要求。结论职业病危害因素主要为石灰石粉尘、稳态噪声,粉尘作业为0级(相对无害作业);稳态噪声危害程度分级为Ⅰ级(轻度危害)和Ⅱ级(中度危害),稳态噪声的危害程度较高;粉尘的职业病防护措施效果较明显,噪声的职业病防护措施应重点关注个体防护用品的使用及劳动者实际接触噪声的时间等。
Objective To determine the occupational hazards and the degree of harm in the production process of Fengshan Mine in Beijing and to determine the effects of occupational disease prevention facilities and occupational health management measures. Methods The occupational disease hazard status was evaluated by occupational health examination, occupational health field investigation, occupational health examination and occupational disease hazard classification. Results The 8 h time-weighted average concentration of limestone dust in the workplace was 0.09-0.39 mg / m3 and 0.16-1.01 mg / m3 of total dust, meeting the requirements of national occupational hygiene exposure limits. The 8 h equivalent sound level of crusher workers is 93.6 dB (A), the noise is excessive; the 8 h equivalent sound level of other types of work meets the requirements of occupational exposure limits of noisy countries. Conclusion The main risk factors of occupational diseases are lime dust, steady-state noises and dust work at level 0 (relatively harmless operation); the degree of steady-state noise damage is graded as grade I (mild harm) and grade II (moderate harm), steady state The harm of noise is relatively high. The occupational disease prevention measures of dust are more effective. The occupational disease prevention measures of noise should pay more attention to the use of personal protective equipment and the actual time of workers touching the noise.