Optimization And Application Of Ventilation System Of Multistage Station In Mechanized Mine

Mine Ventilation is the basic guarantee of mine safety. With the scope of mining and the mines extending to deep increased, the mines using of multi-level stations ventilation are also increasing. Ventilation network of Multi-level stations ventilated mine is complicated, and the number of underground fans are larger, so the optimization of each fans becomes a problem. In addition, more and more mechanization mines of high degree, trackless transport mode brings trouble to the setting of tunnel-type fan machine stations. And it often leads that the multi-level stations ventilation system is imperfect, resulting in ventilation underpowered, insufficient ventilation, opposite direction airflow, airflow short circuit, etc., then directly affect the mine ventilation, and the mines’ production is not safety. The paper aimed at the problems of multi-level station ventilation system a mine in Inner Mongolia that the setting of fans stations at all levels is not reasonable, each machine stand fan does not match, Shimen auxiliary shaft in the middle part of the anti-wind, low tunnel-type blower stations efficiency of the transport tunnel settings, winter freezes of main shaft,and so on. Numerical simulation, theoretical analysis and application of the method of combining the practice carried out the design of multi-level stations ventilation systems, mine ventilation network optimization, cavern type fan ventilator station ejector airflow, multiparallel air curtain for increased airflow resistance spot experimental research. The main contents are as follows:1. By field testing, ventilation network data collection and analysis, mine ventilation network solution models, the author establishes an optimization model of multi-level stations ventilation system.2. Application of mine ventilation three-dimensional simulation system fan and fan selection stations set design. The characteristic parameters of various fan input into the computer, the application of mine ventilation three-dimensional simulation system software to simulate and optimize select the best combination of fan and blower stations set up.3. Application of multi-parallel air curtain function ejector airflow solve difficult to set stations within a transport tunnel fan questions. Application of multi-parallel air curtain technology to build cavern type fan ventilator station in transportation roadway, increasing the amount of wind in the middle of the roadway and control of transportation Merry reverse, improve the multi-level stations ventilation system.4. Application of multi-parallel air curtain for increased airflow resistance by blocking the function of the installation in the transportation roadway. Air curtain reduction in the amount of the main shaft wind and prevent main shaft in winter icing.Results of the study showed that: a mine ventilation three-dimensional simulation system can quickly complete fan and fan selection of stations set design accurately, providing a new way for multi-level stations ventilation system design; cavern type fan ventilator station can substitute roadway type blower station, effectively solve the set within a transport tunnel fans stations of technical problems; multi-parallel air curtain effect on airflow resistance increases significantly reduce main shaft into the wind, preventing main shaft in winter icing. Not only improved the multi-level stations ventilation system, effectively improve the underground working environment, but also to ensure the security and stability of the mine continued production.