无轨胶轮车是一种新型高效的辅助运输设备，目前已在国内外多个煤矿井下普遍使用。但由于其运行于井下封闭受限空间，空气流通不如地面通畅，所以产生的柴油尾气对健康产生的不利影响不容忽视。要彻底解决柴油尾气问题，决定性的前提就是要了解柴油尾气的分布扩散特性从而找到现实可用的解决柴油尾气相关问题的方法。为了实现这一目的，本文用数值模拟方法(FLUENT)来分析研究柴油尾气的分布扩散特性，对尾气中有害气体、颗粒物在巷道内的分布规律等进行预测，为矿井的风流控制提供帮助。 依据在西安科技大学实验室设计搭建的1:10比例的相似模拟巷道(巷道长、宽、高分别为11m、0.48m、0.41m)为模型，计算研究了巷道入口风速（控制在0 m/s -1.0 m/s之间）对定柴油车排气量巷道内DPM（Diesel Particulate Matter-柴油机尾气颗粒物）和CO浓度的分布，结果表明，当巷道通风速度增加时，柴油机尾气与巷道内空气流的相对速度增加，使得尾气与巷道壁面和顶层空气产生分层现象，加速了DPM和CO浓度在巷道X方向和截面竖直方向的衰减。通过模拟结果与实验结果进行对比分析，在巷道横截面和走向方向衰减规律一致，验证了模拟结果的可靠性。 以红柳林煤矿实际矿井水平副运输巷道为例（巷道长、宽、高分别为100m、5m、4m），模拟分析了巷道进风口速度分别为3m/s，6m/s，8m/s，柴油车尾气质量流量为0.15kg/s，尾气中DPM和CO所占质量百分数分别为0.003%、0.025%时，巷道内不同地点DPM及CO的分布。结果表明，从尾气源开始，随着距柴油车尾部距离的增加，DPM及CO浓度衰减，但衰减到一定程度浓度达到一个平衡稳定的浓度值。而对于巷道入口风速的增加，不同截面处的DPM及CO浓度随着入口风速的增大而减少，特别是越是靠近尾气源处可以看出，浓度衰减越快。 本文提供了一种用于确定DPM和CO在矿井巷道中浓度分布的方法，可用于矿工的健康和安全培训。它也可以提高研究人员对柴油机尾气分布的各种控制措施的了解，从而可使得采矿工程师选择客观的通风决策方案，制定提升矿工工作环境的控制策略。

Diesel engine exhaust is a natural by-product from operating diesel engines. Since diesel power is a major source of energy for mining operations today, the adverse health effects of diesel engine exhaust are of a great concern. To thoroughly resolve diesel engine exhaust problems, it is critical that diesel engine exhaust propagation characteristics be understood to arrive at a sensible and practical method for addressing diesel engine exhaust related issues. To achieve this, a computational fluid dynamics (FLUENT) method is used to simulate diesel engine exhaust dispersion and to predict its concentration distribution. Experiments were also carried out in Xiˊan University of Science and Technology Experimental Mine to build simulation model (Length, width and height of tunnel respectively 11 m, 0.48 m, 0.41 m)，and the simulation model and the actual model in a ratio of 1:10. Based on the simulation model, the DPM（Diesel Particulate Matter） and CO dispersion pattern in a Horizontal single lane were studied Under different inlet wind speed of tunnel（Control at 0 m/s - 1.0 m/s）. The results show that diesel exhaust roadway air flow and increase of relative velocity when tunnel ventilation speed increase. Meanwhile, the tail gas from the tunnel wall and top air stratification, to accelerate the DPM and CO concentration in the vertical direction of the attenuation of tunnel. Then the simulation results were compared with the experimental results, in order to verify the reliability of simulation results. With red grahame level deputy haulage roadway coal mine is the object of study(tunnel length, width and height is 100 m, 5 m, 4 m respectively). The simulation analysis that when the tunnel inlet velocity of 3 m/s, 6 m/s, 8 m/s respectively,diesel exhaust mass flow rate of 0.15 kg/s, and DPM and CO in the tail gas of quality percentage is 0.003%, 0.025% respectively, the tunnel DPM and CO concentration distribution in different locations. It turned out that tne diesel engine tail gas of DPM and the CO concentration decay, but the attenuation of the concentration to achieve a balanced and stable level with the increase of distance from diesel tail, With the increase of tunnel ventilation speed, different cross-section of DPM and CO concentration and reduce with the increase of inlet, in particular, near diesel tail, tail gas concentration to reduce faster. This research can provide a means for determine the change of the concentration of DPM and CO in the mine tunnel. It can also improve the understanding of the impacts of various control measures on diesel engine exhaust distribution which can result in an objective decision-making scheme for mining engineers to choose individual or a combination of control strategies to upgrade a miner’s working environment.