Study On Mine Pressurized Ventilation In High Altitude Area Based On Air Curtain Regulation

The high altitude area in western China is rich in mineral resources and is an important saving base for mineral resources in China.However,the poor environment(low pressure and low oxygen content)in high altitude area seriously restricts the underground production of mine,and its influence on underground ventilation system is most obvious.In this context,in order to ensure the normal production of mining enterprises in high altitude areas and the safety of miners’ lives,it is necessary to take effective measures to deal with the problem of low pressure hypoxia.The main contents of this study are:(1)On the basis of consulting and studying the relevant research literature,the influence of high altitude area on air properties,human physiology and ventilation equipment is analyzed deeply,and the causes of difficult ventilation in high altitude environment are analyzed.(2)Based on the theory of mine air curtain,an underground local supercharging model based on air curtain regulation is constructed to alleviate the problem of low pressure and hypoxia in high altitude mine.(3)On the basis of AHP subjective index weight and entropy value method objective weight evaluation,a combined weighting TOPSIS evaluation model for high altitude mine ventilation evaluation is constructed to provide theoretical support for rational selection of high altitude mine ventilation scheme.(4)To solve the problems of low-pressure hypoxia and insufficient effective air volume in a high-altitude mine in the west,three optimization schemes for high-altitudemines are designed based on the local supercharging control of MZG 3850 m section of mine air curtain combined with the model of mine air curtain.