矿山井巷掘进工作面气流组织数值模拟分析研究

Research on Numerical Simulation Analysis of Air Flow Organization in Mining Roadway Heading Face

随着社会进步与科技的发展,作为事故多发的矿产工程安全举措方面得到了国内外研究学者的广泛关注。矿山生产中,掘进工作面又是事故多发的工作面,既是重要的作业场所,也是产尘作业面,产生污染物若不能及时排出井巷外,极易发生中毒及爆炸重大安全事故,严重威胁生命质量安全,因此加强掘进工作面的通风管理工作的意义重大。首先,本文通过国内外研究现状并结合实际作业环境、参考相关文献科学合理地确定了数值计算方法、巷道尺寸、巷道形状及风筒朝向。其次,采用控制变量的方法利用数值模拟软件对圆形巷道5种风筒朝向多角度、全方位进行了气流组织分析。最后,得出圆形巷道气流组织分比较好,气流流动及传动性强、阻力较小、风速降低缓慢,除尘排毒效率高、时间短,非常适合通气排尘且圆形巷道风筒朝向为向下45°时的通风换气效果最好。

With the progress of society and the development of science and technology,the safety measures of mineral engineering,which are prone to accidents,have been widely concerned by researchers at home and abroad.In mining production,the excavation face is an accident-prone working face,which is not only an important working place,but also a dust-producing working surface.If the pollutants produced cannot be discharged from the shaft and roadway in time,it is easy to have major safety accidents such as poisoning and explosion,which seriously threatens the quality and safety of life.Therefore,it is of great significance to strengthen the ventilation management of the excavation face.First of all,this paper scientifically and reasonably determines the numerical calculation method,roadway size,roadway shape and duct orientation by combining the current research situation at home and abroad and the actual working environment with reference to relevant literature.Secondly,the control variable method and numerical simulation software are used to analyze the airflow organization of 5 kinds of air ducts in the circular roadway.Finally,it is concluded that the circular tunnel has better air distribution,strong air flow and transmission,low resistance,slow wind speed reduction,high dust removal and detoxification efficiency,and short time,which is very suitable for ventilation and dust removal,and the circular tunnel has the best ventilation effect when the air duct is oriented down 45°.