大采高综采工作面移架落尘的数值模拟研究  

Numerical Simulation Study on Dustfall During Hydraulic Support Movement in a Fully-Mechanized Mining Face with a Large Mining Height

作　　者：邢飞 涂庆毅 XING Fei;TU Qingyi(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;National Engineering Research Center for Coal Gas Contral,Huainan 232000,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]煤矿瓦斯治理国家工程研究中心,安徽淮南232000

出　　处：《河南科技》2025年第3期35-39,共5页Henan Science and Technology

摘　　要：【目的】研究大采高综采工作面移架落尘粒径分布规律,为移架落尘的粉尘治理提供理论指导和帮助。【方法】运用数值模拟的方法对风流场作用下的移架落尘进行研究,采用SpaceClaim构建工作面几何模型,利用Fluent对不同风速下的移架落尘进行数值模拟,并将得出的移架落尘的粒径分布与相似试验结果进行对比。【结果】在同一风速下,随着离尘源点距离的增加,粉尘的平均粒径逐渐减小。风速越大,在同一测点测得的粉尘平均粒径越大。将数值模拟与相似试验的结果进行对比得出,两者误差随离尘源点距离的增加而增加。粒径范围在165~180μm的粉尘沉降位置在离尘源点4~10 m处;粒径范围在154~165μm的粉尘沉降位置在离尘源点10~16 m处;粒径范围为118~154μm的粉尘沉降位置在离尘源点16~22 m处;粒径范围在88~118μm的粉尘沉降位置在离尘源点22~28 m处;粒径范围为77~88μm的粉尘沉降位置在离尘源点28~34 m处。【结论】通过研究结果分析得出,不同粒径大小的粉尘受风速及重力影响的沉降位置,为以后工作面移架落尘的分区治理提供理论指导。[Purposes]The study aims to investigate the particle size distribution patterns of dustfall during hydraulic support movement in a fully-mechanized mining face with a large mining height,so as to provide theoretical guidance and assistance for the control and mitigation of dustfall,which originates from the movement of hydraulic supports.[Methods]Utilizing numerical simulation methodologies,this study investigates the dustfall during hydraulic support movement under the influence of airflow within a fully-mechanized mining face.The geometric model of the mining face is constructed using SpaceClaim,and Fluent is employed to conduct numerical simulations of dustfall under varying wind speeds during hydraulic support movement.The obtained particle size distribution of dustfall is then compared with experimental findings.[Findings]At a constant wind speed,the average particle size of dust gradually decreases as the distance from the dust source increases and the larger the wind speed,the larger the average particle size of dust is measured at the same measuring point.A comparison between the numerical simulations and similar experiments reveals that the error between the two increases with the increasing distance from the dust source.Dust particles within the size range of 165~180μm experience dustfall within a distance of 4-10 m from the dust source.For particles ranging from 154~165μm,the dustfall location is between 10-16 m from the dust source.Dust particles with a size range of 118~154μm settle within 16~22 m from the dust source.Particles measuring 88-118μm in diameter undergo dustfall at a distance of 22~28 m from the dust source.Lastly,dust particles within the size range of 77~88μm settle at a distance of 28~34 m from the dust source.[Conclusions]Through analysis of the research findings,it is concluded that the settlement locations of dust particles of varying sizes are influenced by wind speed and gravity,providing theoretical guidance for future zoning management of dustfall during hydraulic support

关 键 词：综采工作面 移架落尘 数值模拟 粒径分布 

分 类 号：TD714.4[矿业工程—矿井通风与安全]