基于FLUENT的长抽短压强制通风技术数值模拟

Numerical Simulation of the Long Duct Exhaust and Short Duct Forced Ventilation Model Based on Software FLUENT

摘要: 矿山资源的枯竭，促使老矿山努力在周边或深部探寻新的接替资源，形成了对长掘进工作面局部强制通风技术的现实需求。本文使用前处理软件GAMBIT建立了长压短抽三维计算模型。本文采用计算流体力学的商业软件FLUENT，模拟了长掘进工作面长抽短压局部通风方式下的工作面风流组织，阐述了长抽短压通风方式的内部机制，分析了经典参数模型下的通风效果。研究表明：在长抽短压的局部通风方式下，射流作用域明显大于吸程作用域；根据经典的有效射程和有效吸程参数布置的风筒位置，不利于掘进工作面污风的快速排出；巷道中心位置上的速度大小波动较大，受入口射流和风流出口双重控制；压风量和抽风量的差值决定了整个掘进巷道内的污风排出时间和空气质量。研究成果可以为长掘进工作面局部强制通风技术参数优化提供理论依据和实践指导。 With resources depletion, part of the old mine efforts to explore the new succeed resources at the peripheral or deeper place. These situations bring about the practical needs of forced ventilation technology of the long distance heading face. Based on the pre-processing software GAMBIT, three-dimensional computational model of the long duct exhaust and short duct forced was set up. By using the commercial CFD software FLUENT, airflow organization of long heading face under the long duct exhaust and short duct forced local ventilation model was simulated. According to this, the paper has elaborated the internal mechanism of the long duct exhaust and short duct forced local ventilation model, and has analyzed the ventilation effect of the classical ventilation parameters model. Studies have shown that: in local forced ventilation mode of the long duct exhaust and short duct forced, the scope of jet was significantly greater than that of exhaust; Duct location layout according to the classical effective parameters range of forced and exhaust is not conducive to the heading face air pollution rapid discharge; The value of speed at the center of laneway was fluctuated and dual-controlled by forced and exhaust; The air volume difference of forced and exhaust determines pollution air discharge time and air quality within the entire laneway. The purpose of this study is to provide theoretical basis and practical guidance to further parameter optimization study on local forced ventilation technology of the long distance heading face.