Research And Application Of Ventilation System In Stratified Division Multiple Wind Tunnels In Liangshuijing Coal Mine

At the present stage of the cool water well coal mine,the multi level opening method of the inclined shaft and the zoned ventilation mode are adopted.At the same time,the 311 mine panel with 421 panel mining,one return slope service 311 and two level District No.two South Wing mining ventilation,air shaft service 421 panels and two level north wing ventilation.In mine ventilation system,there is interference between parallel operation of dual fans and 3-1 coal transportation inclined lane in diagonal network,and the direction of air flow and air volume are unstable.With the completion of the 311 and the 421 mining area of the mine and the two level to form an independent return air system,the mine production will extend to two level,and the ventilation system will become more complex.Therefore,it is very important to study the rationality of the ventilation system at the same time in the 422 disk area and the two level 431 disk area.According to the basic situation of Liangshuijing coal mine 422 mining area and 431 disc area at the same time,the feasibility analysis of the hierarchical multi shaft ventilation system theory.First of all,the factors that affect the ventilation stability of mine ventilation network are analyzed,and the optimization of the diagonal branches in the ventilation system is made,and the adjustment measures are determined.The CFIRE software is used to solve the optimization plan.Secondly,on the basis of stabilizing the branch air flow direction,we analyze the influence of the two fan joint operation point,the wind resistance of the common section and the wind resistance of the independent working network on the operation point of the fan,and determine the adjustment measures for the combined operation of the two fans.Finally,from the main underground places using air,the main fan of mine stability,plot hole,Finally,from the main underground places using air,the main fan of mine stability,plot hole,wind direction and stability and other aspects to do quantitative analysis on the ventilation system,422,431 panel mining ventilation scheme of layered partition type is effective and feasible,stability of ventilation system.The research results in this paper provide a theoretical and technical reference for similar mine ventilation system.