Research And Application Of Index System Optimizition Of Aging Mine Ventilation Based On Variance Inflation Factor

With continuous mine production, mine by the construction, operation and maternity as well as gradually yield to aging. Ventilation network and ventilation circuits are very complex, which leading to that aging period of mine ventilation system does not fully meet the production needs of mine.In order to ensure mine production safety and efficiency, the aging ventilation system must be optimized. However, the optimization projects vary from different required demands during the whole process. Building a simple and practical index system, determining the index weight, selecting a convenient and fast method of evaluation are the key to ventilation system optimization.This paper summaried out the characteristics of mine ventilation system in a whole life cycle based on mine lifecycle theory.The huatai coal mine which is a aging mine as a research object. This paper had finished following work: mine ventilation resistance determination and mine ventilation system computer status simulation, found the problem in mine ventilation system.Then proposed optimal programme from ventilation system internal and external optimization.Checking out relevant literature found that there are many indexes evaluation of mine ventilation system, which didn’t meet on the aging evaluation of mine ventilation system, so this paper created a new index system to meet them. This paper introduced the variance inflation factor(VIF) to find the relation of various indicators. At last, established an index system suitable for optimization of mine ventilation system, which includes 10 practical indicators: investment expenditures(R1), power cost(R2), mine pressure(R3), mine air volume(R4), effective mine air volume ratio(R5), the proportion of return airways resistance(R6), the proportion of the inlet section resistance(R7), the stability of operation of the fan(R8), mine resilience(R9), ventilation systems management difficulty(R10). Meanwhile combine Analytic Hierarchy Process(AHP) and Entropy Weight Method(EWM) for confirmation of the weight of each index system to finally set up a GRA-based safe and reliable optimization mode. This model had been applied to the Huatai coal mines, which selected the optimal program.The actual operating results of Huatai mine verified its scientificity, accuracy and availability.