Research of influence of working conditions on the general incidence of foundrymen

Working conditions of workers in foundries and their influence on morbidity with temporary disability are considered. The results of the distribution of diseases in the foundry shops with different character of production for individual nosological forms. It is noted that the increased levels of noise and vibration, high dust concentration in the air of the working area, significant values of air temperature, the intensity of infrared radiation increase the number of cases of morbidity with temporary disability, such as acute respiratory infections, diseases of the musculoskeletal system, respiratory diseases, infections and skin diseases, etc.

Numerical Simulation of the Dust Suppression with Forced Ventilation Shunt Mode in Fully Mechanized Workface

Based on fluid mechanics, the theory of gas-solid flow and jet theory etc. Dust migration regularity in fully mechanized workface was studied and simulated under far-pressing-near-suction ventilation with FLUENT Simulation technology. When the ratio of blowing to suction (μ) is larger than 1, the range of high dust concentration reduces and the maximum dust concentration decreases. The sketch of flow field of the different μ, the short of traditional far-pressing-near-suction ventilation and the superiority in practical of dust removal mode with the forced ventilation shunt were summarized and analyzed. The dust migration regularity in different shunt parameters (K) in this mode was simulated. Increasing shunted air quantities (Q) is beneficial to the control of dust diffusion in the roadway. But dust concentration near pressure air side will increase if the value of the shunted air quantities is over a critical value.