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Calculation of risk for workers in dust working site
The fibrogeneous dust is considered as a specific harmful substance in the mine working site. Such kind of dust cumulates in lungs and this fact usually results in lungs dusting, so - called pneumoconiosis. Thus, dustiness risk poses a probability of lungs damage by pneumoconiosis. For the calculation of dustiness risk it is needed to know the following data: the value of average dustiness kC in the working site per a definite time period, the dispersivity of dust D (it determines a portion of dust particles with a diameter under 5 µm, so - called respirable particles) and the percentage content of quartz Qr in the respirable grain size fraction.The contribution presents the calculation of dustiness risk R according to the equation (1), where R is in percentage, a is the analytically specific harmfulness and KDc is the total cumulative dust dose received by worker in time of its dust exposure.The total cumulative dust dose is calculated on the basis of the equation (4), where kc is the average dust concentration in the assessed time period, ttime of exposure, V average amount of air inspired by exposed worker per time unit ( standardized on the value of 1,2 m3h-1),10-6-recalculation from mg to kg for KDc.If the values of Qr, D and kc during the worker exposure on a definite workplace are constant, the dustiness risk R is calculated according to the equation (1) and (5) respectively. In the case of n time intervals in that the values Qr, D and kc are known the dustiness risk R is calculated according to the equation (7). The total personal risk of worker is given by the equation (8).Conclusively, the influence of parameters change namely Qr, D and kc on the value of dustiness risk per equal time period is reported.
Calculation of risk for workers in dust working site
The fibrogeneous dust is considered as a specific harmful substance in the mine working site. Such kind of dust cumulates in lungs and this fact usually results in lungs dusting, so - called pneumoconiosis. Thus, dustiness risk poses a probability of lungs damage by pneumoconiosis. For the calculation of dustiness risk it is needed to know the following data: the value of average dustiness kC in the working site per a definite time period, the dispersivity of dust D (it determines a portion of dust particles with a diameter under 5 µm, so - called respirable particles) and the percentage content of quartz Qr in the respirable grain size fraction.The contribution presents the calculation of dustiness risk R according to the equation (1), where R is in percentage, a is the analytically specific harmfulness and KDc is the total cumulative dust dose received by worker in time of its dust exposure.The total cumulative dust dose is calculated on the basis of the equation (4), where kc is the average dust concentration in the assessed time period, ttime of exposure, V average amount of air inspired by exposed worker per time unit ( standardized on the value of 1,2 m3h-1),10-6-recalculation from mg to kg for KDc.If the values of Qr, D and kc during the worker exposure on a definite workplace are constant, the dustiness risk R is calculated according to the equation (1) and (5) respectively. In the case of n time intervals in that the values Qr, D and kc are known the dustiness risk R is calculated according to the equation (7). The total personal risk of worker is given by the equation (8).Conclusively, the influence of parameters change namely Qr, D and kc on the value of dustiness risk per equal time period is reported.
Calculation of risk for workers in dust working site
Geldová Erika (author) / Bobro Milan (author) / Slanèo Pavel (author)
2004
Article (Journal)
Electronic Resource
Unknown
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