Optimization And Environmental Control Technology Of Ventilation System For Metal Mines Based On Ventsim

With the continuous exploitation of mining resources in China,the shallow mineral resources have gradually dried up.Research data show that more than 1/3 of China’s mines have been transferred to deep or complex deposits.With the increase of mine mining depth,not only the mine mining technology is higher requirements,but also the underground environmental problems are becoming more and more prominent,and the bad downhole environment has become a bottleneck restricting the further development of many metal mines in China.Statistics show that dust and gun smoke are the two main sources of pollution in most metal mines.In this paper,taking a metal mine in Anhui as the research object,the corresponding solutions are put forward in view of the problems such as the ventilation system disorder,the low efficiency of the fan device,the insufficient air intake in the deep mining area,the retention of the cannon smoke in the single operation face,the breaking system and the serious dust pollution in the deep mining area.In view of the problem of the downhole ventilation system and the insufficient air intake in the deep mining area,the ventilation network and the air volume regulation theory are used,the ventilation network,the layout of the ventilation structure and the installation of the machine station are redesigned,and three sets are put forward.Ventilation optimization scheme is used to simulate the optimization effect of various schemes with Ventsim.At the same time,the comparison and analysis are carried out from two angles of technology and economy,ensure that the plan is technically feasible and economically reasonable.In view of the environmental problems existing in the underground,the local ventilation is effectively solved by using the local ventilation and purification technology.In order to solve the problem of smoke retention,the ultrasonic atomization and dust suppression technology is used to realize in situ dust suppression.According to the ventilation and environment problems existing in a metal mine in Lu’an,a complete optimization scheme is put forward.Later detection data show that the effective air volume rate,wind quality qualification rate,comprehensive index of ventilation system,and the average efficiency of the station are raised from 41.2%,84.6%,78.7% and 29.6% to 90.2%,100%,91.9%,85.7%,respectively.The distribution of the air volume in the middle section of the underground is reasonable,and the air flow is formed in each area.The working environment of each working face in the underground has been greatly improved,and the effect of the environmental transformation,the optimization of ventilation and the energy saving of the system is very remarkable.To sum up,this project not only effectively solved the ventilation and environmental problems facing the mine,but also provided experience and reference for the subsequent ventilation system and the underground environment transformation of the same kind of mine.