The March Copper Mine Ventilation System Optimization Research

Huo Geqi copper mine is a large polymetallic mine,Its main product is copper concentrate. The mine is excavated by a main shaft, a auxiliary shaft and slope ramp.The mine ventilation system is central into wind the two wings of return air wings diagonal drawer-type ventilation system. Now the production of the mine has expanded from the original200x104t/a to400x104t/a. With the deep development project implementation, the present ventilation syatem exists some problems in ventilation network, facilities and effect, which have already seriously constrainted the normal safety production. Therefore, establishing such ventilation with the characteristics of safety, reliability, technical feasibility, economic rationality and management convenience by optimizing design and research of the mine ventilation system, which have a pratical signifance to safety production.Conducting the research of the mine ventilation system by applying the mature technology based on full investigation, testing and analysis of the original ventilation system. According to the mine actual production condition, reasonable and feasible modification scheme was put forward, then network caculation was made for each scheme. Through the establishment of the ventilation system optimization index system, and then the gray relation grade, using respectively fuzzy hierarchy combination optimum model and hierarchical analysis method of optimal combination closely value mathematical model to scheme selection, ultimately determine the optimal ventilation system reform plan. Through the establishment of the ventilation system optimization index system, and then the gray relation grade, using respectively fuzzy hierarchy combination optimum model and hierarchical analysis method of optimal combination closely value mathematical model to scheme selection, ultimately determine the optimal ventilation system reform plan.The ventilation system plan was optimized by the mathematical model established on the plan, which has obtained good effect on the mine ventilation condition and turned the original situation that ventilation system can’t meet the production requirements. In the process of plan optimization, multi-objective decision of osculating method can not only solve what problems fuzzy mathematics theory can solve, but also has the advantages of clear principle, concise method and high reliability; The optimization model of fuzzy hierarchy portfolio on grey correlation was built based on the grey theory, fuzzy synthetic evaluation and analytic hierarchy process can avoid the interference of human factors at maximum, making the optimization results more objective, scientific and reliable. Both of the model could provide scientific and reasonable decision method for mine technicist.