均压通风技术治理采空区CO涌出数值模拟

针对榆家梁煤矿42221工作面采空区CO向工作面大量涌出的问题,利用数值模拟方法研究风机-风窗联合调压技术改变工作面风路上的压力分布,以降低工作面两端压差,减小漏风,防治采空区CO涌出。依据通风动力学理论,分析了均压通风的原理,并应用流体力学软件Fluent对实施均压前后漏风量分布、静压和采空区CO浓度变化进行了数值模拟。实验结果表明在采用均压措施后工作面两端压差明显降低,进而使得采空区漏风量和工作面CO浓度显著减小,有效解决了采空区CO等有害气体向工作面涌出的问题。

Numerical Simulation of Pressure Balancing Ventilation Technology in Treating Gob CO Emission

Aiming at the issue that mass of CO emission from the gob area to 42221 working face in the Yujialiang Coal Mine,by the means of numerical simulation,the measure of the fan and air window jointed working for changing the pressure distribution along the wind path was studied to reduce the differential pressure at the ends of the working face,decrease the air leakage,and prevent the CO emission.According to the theory of ventilation dynamics,the principle of pressure balancing ventilation was analyzed,and the fluid mechanics software Fluent was used to simulate the distribution of leakage air,static pressure and the changes of CO concentration in gob area before and after the implementation of pressure balancing.The results showed that the differential pressure at the ends of the working face reduced significantly,and then made the air leakage and the concentration of CO in the working face greatly decreased after using the pressure balancing ventilation.It effectively resolved the problem of CO and other harmful gas emission to the working face.