Optimization And Management Of Metal Mine Ventilation System

With steadily increasing demand for mineral resources nearly a decade, which led to therapid development of the mining industry. With the mining has been expanding and depthincreasing, the complexity of geological conditions, difficulty of improving mechanization, itmakes underground mining conditions and production methods also have major changes, andled to more problems to its ventilation system, which affecting the mining production andminers safety. To this end, further research to resolve issues and problems of mine ventilationsystem, is important to improve underground working environment.Though studying a lot of literature and on-site research, summed up the characteristics ofthe new era of metal mines in the survey, in the investigation, on the basis of more than10metal mine ventilation measurement data, application of metal mine evaluation indexes ofmine ventilation system are analyzed in detail and the comprehensive evaluation，summarizedthe metal mines exist commonalities and differences in issues such as the fan does not matchwith the ventilation network, poor airflow regulation, complex ventilation network, poorventilation management and other reasons, resulting in poor ventilation, poor workingenvironment and so on.To solve these problems，this paper in terms of theoretical analysis such as mine dynamicoptimization, ventilation network optimization, ventilation facilities optimization, ventilationsystems management, through theoretical analysis combined with field test carried outresearch work，solved the problem of metal mine ventilation system optimization, achievedbetter results. The main research contents and research results are as follows:(1) The evenfans worked more stable than the odd fans when they are in same model, and diffentfrequency in same model can worked in stable state. Application of frequency and remotecontrol technology, can improve the use and management of the fan, then enhance theflexibility of its work;(2) The air control capacity at special position adjustment andflexibility is better than conventional structures;(3) the main fan-chamber-type auxiliary fancombined control methods can improve inadequate air flow panels multistage ventilationsystem due to the problems caused by insufficiency econdary stations.The application showedthat the airflow to panel is increased from less than10m3/s to about20m3/s; and found that thetype of auxiliary chamber fan can replace smaller stations of multi-level stations, but can notreplace large stations temporary by the impact of the wind and cost efficiency of wind turbines;(4) The3DVS systems can be realized simulation and visualization management onthe ventilation system, guiding the adjustment and optimization of fans, simulation andevaluation to the impact of ventilation by natural air pressure and dynamic changes of thenetwork in different seasons or period, for analysising and managing the ventilation systems,which helped to maintain and extend the validity of the ventilation system.This paper take a a lead-zinc mine ventilation system thesis as example, summed up theoptimization process and principles of the metal mine ventilation system, and advanced threeoptimization schemes, applicated3DVS system simulation and evaluation, through thecomprehensive analysising of various programs, determined the optimal scheme. After theimplementation of the program, each of the lead-zinc operations by the middle of the totalintake air volume is increased from40.35m3/s to60.18m3/s, comprehensive index increasedfrom44.6%to73.9%, which greatly improved the underground ventilation.