基于同位素追踪的煤矿通风粉尘含量变化模拟研究

Simulation Analysis of Dust Content Change in Coal Mine Ventilation based on Isotope Tracing

针对目前煤矿内呼吸性粉尘含量高且防尘效率低的问题,基于同位素追踪进行煤矿通风粉尘含量变化模拟分析。以淮南矿区的朱集矿Q工作面为研究区,建立二元线性混合粉尘分源计算模型,利用碳同位素追踪原理,定量分析研究区通风粉尘来源,并利用气固两相流数学模拟方法中的离散相模型结合研究区采场特点,采用随机轨道方法,模拟通粉尘浓度分布情况及风粉尘运动规律。结果表明入口风速越小,粉尘停留时间越长、含量越高、受到气相流场干扰越微弱。

Aiming at the current high content of respirable dust in coal mines and low dust control efficiency,a simulation analysis of changes in coal mine ventilation dust content is based on isotope tracking.Take the Q working face of Zhuji Mine in Huainan mining area as the research area,the study established a binary linear mixed dust separation source calculation model.It uses the carbon isotope tracking principle,quantitatively analyze the source of ventilation dust in the research area,and use the gas-solid two-phase flow mathematical simulation method to combine the characteristics of the stope in the study area with the discrete phase model.The random trajectory method is used to simulate the distribution of dust concentration and the law of wind dust movement.The results show that the lower the inlet wind speed,the longer the dust residence time,the higher the content,and the weaker the interference from the gas flow field.