Impact Study Of Digging Ventilation System To The Main Ventilation System In Mine

In the mining industry of our country,mine digging is one of the most important place in mine production.As an important part of main ventilation system,digging ventilation system influences main ventilation system a lot,which has a significant meaning to study it.Based on the basic principle of computational fluid mechanics and the integral,using the research methods of numerical simulation combined with the relevant mathematical theory,this paper puts forward the numerical and integral method to calculate resistance of the digging ventilation system,and compares the method to the conventional calculation means.By using the method to deduce physical quantity of the mine ventilation system related,the expression formula of total air volume of mine and main fan wind pressure are solved.Combining with an instance of Jincheng mine,the paper finally studys the influence of length of the digging tunnel to actual working condition point,makes quantitative description of this influence,and sums up the formula of the corresponding change.The study shows:The conventional method to calculate the total resistance of the digging ventilation system is not accurate,while using numerical and integral method is more precise;With the length of digging tunnel increasing,the actual working condition point of the mine moves toward direction of the main fan performance curve downward;Mine total volume increment is a quadratic function about dinging tunnel length,and with the length of digging tunnel increasing,the mine total air volume increment gradually increases;Main fan wind pressure increment is a quadratic function about dinging tunnel length,and with the length of digging tunnel increasing,the main fan wind pressure increment decreases.