Numerical simulation of dry and efficient dust controlfor working face under fast excavation environment
Dust control of fast excavation face,as a key and difficult problem of dust control,seriously threatens miners'oc-cupational health and mine safety production.Therefore,this paper establishes an equal-scaled physical model for the driving face of the 1# return air main roadway in the west of Gaojiapu Coal Mine.Based on Fluent,the change laws of the airflow field and dust field of the roadway under different conditions of traditional single pressure dust control,mine dry dust collec-tor and long pressure and short extraction combined dust control are simulated,respectively.The results show as follows:Af-ter the use of long pressure short extraction and the installation of dry dust collector,the air speed of the roadway is signifi-cantly increased from 1.8 m/s to 4.5 m/s,and a larger vortex field is formed under the negative pressure of the extraction fan.The field measurement results show that after the combined use of dry dust collector with long pressure and short extrac-tion ventilation,the coal dust at each sampling point of the driving face of the 1 # return air main roadway in the west of Gao-jiapu Coal Mine is lowered by 150 mg/m3,which significantly reduces the dust concentration of the working face,improves the working environment,and protects the health and safety of operators.
dry dust controlnumerical simulationdust controlexcavation working face
万方数据
维普
