露天矿运输道路二次扬尘颗粒物运动规律数值模拟研究  

Numerical simulation study on movement law of secondary dust particles on transport road of open-pit mines

作　　者：鲁轲 巫亮 龚小兵 LU Ke;WU Liang;GONG Xiaobing(China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037 [2]煤矿灾害防控全国重点实验室,重庆400037

出　　处：《露天采矿技术》2024年第2期10-15,共6页Opencast Mining Technology

基　　金：国家重点研发计划资助项目(2022YFB4703603)。

摘　　要：为揭示露天矿大型自卸卡车行驶过程影响下运输道路二次扬尘排放特征,为露天矿运输道路粉尘治理提供依据和理论指导,以西湾露天矿为研究对象,建立气固两相流模型,通过数值模拟的研究方法,对自卸卡车在干线道路行驶过程中的道路扬尘规律及不同粒径大小粉尘颗粒运动特点进行了数值模拟研究。研究结果表明:自卸卡车运行速度会对道路二次扬尘产生影响,自卸卡车运行速度越大,扬尘高度和扬尘范围越大;自卸卡车运行速度不变的情况下,不同大小的粒径颗粒在车身运动产生的气流扰动影响下会在车头前方和车尾后方会产生不同大小的扬尘范围,小粒径颗粒在车头前方和车尾后方产生的扬尘范围更大,较大粒径颗粒在车头前方和车尾后方产生的扬尘范围较小;由于自卸卡车行驶过程中在车尾后方会形成持续的涡流区,相同粒径大小条件下,车尾后方的二次扬尘范围大于车头前方产生的二次扬尘范围。In order to reveal the characteristics of secondary dust emissions from transportation roads under the influence of large dump trucks in open-pit mines,and provide basis and theoretical guidance for dust control on transportation roads in open-pit mines,a gas-solid two-phase flow model was established with Xiwan Open-pit Mine as the research object.Through numerical simulation research methods,a numerical simulation study was conducted on the dust emission law and the movement characteristics of dust particles with different particle sizes during the operation of dump trucks on main roads.The research results indicate that the operating speed of dump trucks will have an impact on secondary dust on the road.The higher the operating speed of dump trucks,the greater the height and range of dust.When the operating speed of the dump truck remains constant,particles of different sizes will generate different dust ranges in front and behind the vehicle due to the airflow disturbance caused by body movement.Small particles will generate a larger range of dust in front and behind the vehicle,while larger particles will generate a smaller range of dust in front and behind the vehicle.Due to the continuous vortex zone formed behind the rear of the dump truck during its operation,the range of secondary dust generated behind the rear of the truck is greater than that generated in front of the truck under the same particle size conditions.

关 键 词：露天矿 颗粒物 扬尘规律 数值模拟 离散相模型 

分 类 号：TD714[矿业工程—矿井通风与安全]