Research on adjustment and optimization of ventilation system with multiple levels and multi-shafts
In response to the potential problems of more complex ventilation systems,longer ventilation lines,and greater resistance in the ventilation system may face for the target mine's development extension in new level and new mining area preparation of recovery,it is planned to use new NO.2 return air shaft in the coal mine to undertake the ventilation task of the new mining area.Through calculation and network analysis,the air volume,air pressure,and equal area holes of the main ventilation fan and ventilation parameters under working conditions are obtained,and combining with the individual characteristic curves of the main ventilation fan,the FBCDZ №.36/2×800 model is selected as the main ventilation fan.By comprehensively comparing and analyzing the advantages and disadvantages of plan 1 and plan 2,the optimization plan for adjusting the ventilation mode of"4 in 2 loops"in Plan 2 is determined.The results show that the main ventilation fans in the coal mine had surplus air volume,reasonable distribution,reduced ventilation negative pressure,significantly reduced the length of the maximum ventilation resistance route,and the great implementation effect of ventilation system adjustment.
multi-shafts coal minesmine ventilationoptimization of ventilation systemreturn air shaft
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