独头掘进巷道排柴油机尾气通风参数的数值模拟优化研究

为了分析地下无轨独头掘进巷道内柴油机尾气的迁移规律,以衢州某地下工程大断面独头掘进巷道为对象。采用计算流体力学(computational fluid dynamics,CFD)方法模拟了压入式通风方式以及不同柴油机负荷率情况下,巷道内柴油尾气浓度随风筒出口距掘进面距离和安装高度的关系。获得的结论为:在两种柴油机负荷率下,压入式的风筒距工作面的距离为13~15 m,距地面3 m时,排柴油机尾气效果最好;固定风筒距地面高度3 m,随着风筒距工作面的距离增加,在独头掘进巷道内柴油机尾气平均质量浓度先减少后增加。

Numerical Simulation on Optimization of Exhaust Ventilation Parameters of Diesel Engine in Blind Roadway

In order to analyze the migration law of diesel engine exhaust gas in underground trackless single heading roadway, a large section single heading roadway of an underground project in Quzhou was taken as the object. Computational Fluid Dynamics (CFD) method is used to simulate the relationship of diesel exhaust concentration with the distance from air duct outlet to tunnel face and installation height under different diesel engine power. The conclusions obtained include:in the case of two load rates of diesel engine, the press-in type has the best effect of exhausting diesel exhaust at a distance of 13 m~15 m from the working surface and 3 m from the ground. The fixed duct is at a height of 3 m from the ground, and as the distance of the duct from the working face increases, the average mass concentration of diesel exhaust gas in the single-headed tunneling tunnel first decreases and then increases.