Hazard Evaluation And Comprehensive Dust Prevention Facilities Optimization Measure Of The Respiratory Dust In Fully-mechanized Caving Face

Dust lung is a bigger threat to miners'health for years,which caused by floating respiratory dust in work place.The fully-mechanized caving face is the key area of the emergence of respiratory dust and the miners'dust lung. Usually ,when it products normally while the dust prevention facilities operate at full load , the dust concentrations are higher than the specified concentration. Therefor, it is necessary to monitor the whole class works'individual respiratory dust concentrations and analyze the harm level of exposure to dust for working out the comprehensive prevention dust measures.It tests some dust characters . monitor each worker's respiratory dust concentration and analyze the harm level of respiratory dust in coal mines of Shaanxi province. It can be concluded that harm level of dust and respiratory dust concentration is higher in full-mechanized caving face.Operators and prop-setters are at a higher level of exposure to dust and harm.Taking the fully-mechanized caving face as the research object. The geometry models were established by Design Modeler. The mesh was created by Meshing.Using ANSYS as plats simulate the wind speed and respiratory dust distribution in fully-mechanized caving face. Simulation results were same to the each workers' respiratory dust concentration .The simulation validated the measured data and provided thinking of dust prevention facilities optimization.By analysing the simulation results and measured date, It can be concluded the keys are optimization shearer drum production dust facilities and purifying condition optimize of production dust sonrce.The dust prevention facilities optimization measure in fully-mechanized caving face was came up by analysing the harm level of exposure to dust and the underground coal condition.