[Investigation on standard application of industrial dust hazard classification].

To investigate the application and effectiveness evaluation of the standard of GBZ/T 229.1-2010 in practice, and to explore the applicability, aiming to provide technical evidence for the revision of GBZ/T 229.1-2010. There were 2 questionnaire surveys carried out in the study, including general survey and specific survey. Databases were established and data were input with Excel 2010 and Epidata version 3.1 software. SPSS version 19.0 software was used for data cleaning and statistical analysis. The general survey received 100 questionnaires, with 43 from facilities and 57 from professional expertise. There were 59 questionnaires from occupational health technical service organizations held by government, and 11 from colleges and universities. The leading three jobs using GBZ/T 229.1-2010 were the occupational hazards evaluation for constructive project (69.0%) , lecturing/training (55.0%) , occupational hazards monitoring (50.0%) , respectively. The high frequency used contents of GBZ/T 229.1-2010 were the fourth part "classification" (67.0%) , the fifth part "the principles of classification management" (59.0%) , annex A "the correct use instructions" (52.0%) , respectively. In the results of feasibility, scores of the fourth part "classification" , the fifth part "the principles of classification management" , annex A "the correct use instructions" were 3.07, 3.03, 3.23, respectively. The parts needed to be modified as priories were the fourth part "classification" (22.0%) , the fifth part "the principles of classification management" (13.0%) , annex A "the correct use instructions" (12.0%) . The specific survey received 15 questionnaires, with 12 from the employers and 3 from occupational health technical service organizations. The awareness rate of GBZ/T 229.1-2010 among occupational health professionals was 83.3%. Classification results in the employers were used for guidance on improvement measures (66.7%) , health surveillance and monitoring (58.3%) , certification for occupational health and safety management system (33.3%) , occupational disease diagnosis (33.3%) , and personal protective equipment issued (33.3%) , etc. In the results of feasibility, scores of the content of free SiO(2), occupational exposure ratio, physical labor intensity level, classification of industrial dust, principles of classification management, annex A "the correct use instructions" were 5.00, 4.33, 5.00, 5.00, 3.67, 3.67, respectively. GBZ/T 229.1-2010 indicates that the standard is feasible and practical. But there are still some problems, such as classification of different kinds of industrial dusts at workplace, and the interaction of occupational exposure to industrial dusts and other hazards at workplace, etc.