Optimization of Combined Ventilation System of Multiple Air Shafts in a Mine
With the putting into use of new air shaft called Huanao,the number of return air shafts in Changcun Coal Mine has reached 4,forming a complex combined ventilation system of six in and four out air shafts,and the mine ventilation energy consumption will be an important issue to be considered.Combined with the analysis of ventilation network,the study of energy saving and emission reduction in Changcun Coal Mine is carried out.The analysis shows that the ventilation power adjustment measures of Wangcun air shaft have the greatest influence on the ventilation power consumption of the whole mine.Therefore,strengthening the management of the damper,reducinge air leakage(Plan I)and replacing the 2302 working face with the 2701 working face(Plan II)are proposed.Through comparative analysis of the influence of the two schemes on the ventilation system,it is found that the energy-saving effect of the second scheme is more obvious,which can save 3 191 500 yuan of electricity,and produce good economic benefits through the main fan fre-quency conversion adjustment,which has important practical guiding significance and application prospects for ensuring the sustainable development of mine production.
undergroundminecomplex ventilation systemfan frequency control
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