Faculty of Land Resources Engineering,Kunming University of Science and Technology
Faculty of Public Safety and Emergen⁃cy Management,Kunming University of Science and Technology

针对主进风竖井内罐笼提升产生的活塞风效应及其对运输平巷内风流的影响。基于SSTk-ω湍流模型,采用动网格对罐笼在竖井内运行进行空气流体仿真并通过现场实测对模拟数据进行验证的方法,研究竖井活塞风影响下运输巷道内风流流场的结构变化以及巷道内风流流动的紊动特性。研究结果表明:罐笼在竖井内运行产生的活塞风会造成平巷内风流的瞬态变化,导致巷道内风流流场分布紊乱,对局部风流扰动较大;活塞风影响下巷道内风速概率密度曲线走势呈正态分布;沿纵向分布的风流紊动强度值在活塞风影响下变化趋势存在自相似性,整体呈指数分布;沿横向分布的风流紊动强度在活塞风影响下沿巷道中心线呈对称分布;在巷道内局部位置分别取得沿纵向分布的风流紊动能最大值Emax=0.249m2/s2以及沿横向分布的风流紊动能最大值Emax=0.503m2/s2,紊动能值较大,易造成巷道内局部高、低速风流、涡流以及对周围风流产生卷吸作用。矿井通风系统遭到矿内不稳定因素影响,则可能导致井下局部用风地点或整个风流系统紊乱,主进风竖井内罐笼频繁提升引起的一系列附加效应会对运输平巷通风效果产生较大影响,研究罐笼提升活塞效应对巷道内风流的影响为补充矿山局部通风理论提供参考。

In this study,aiming at the piston wind effect caused by cage lifting in main air intake shaft and its influenceon air flow in transportation roadway,based on the SST k-ω turbulence model,the dynamic mesh is used to simu⁃late the air fluid during the cage running in the shaft and the simulation data is verified by field measurement. Thestructural change of the airflow field in the transportation roadway under the influence of the piston wind in the shaftand the turbulence characteristics of the airflow in the roadway are studied. The results show that the piston wind gen⁃erated by the operation of the cage in the shaft will cause the transient change of the airflow in the flat roadway,lead⁃ing to the disorder of the airflow field distribution in the roadway and the large disturbance to the local airflow.The trend of probability density curve of wind speed in roadway under the influence of piston wind is a normal distri⁃bution. The trend of turbulence intensity along the longitudinal distribution under the influence of piston wind is self⁃similar,and the overall distribution is exponential. The wind turbulence intensity along the transverse distribution issymmetrically distributed along the roadway center line under the influence of piston wind. In the local position of theroadway,the maximum value of the wind turbulence kinetic energy along the longitudinal distribution is Emax =0.249 m2 / s2,and the maximum value of the wind turbulence kinetic energy along the transverse distribution is Emax =0.503 m2 / s2. The turbulent kinetic energy value is large,which is easy to cause local high and low⁃speed airflow,ed⁃dy current and entrainment of surrounding airflow in the roadway. The mine ventilation system is affected by the unsta⁃ble factors in the mine,which may lead to the disorder of the local air use location or the whole air flow system. A se⁃ries of additional effects caused by the frequent lifting of the cage in the main air intake shaft will have a big impacton the ventilation effect of the transportation roadway. The study of the influence of the cage lifting piston effect on theair flow in the roadway provides a reference for supplementing the mine local ventilation theory.

云南省重点研发计划资助项目(202003AC100002);昆明理工大学引进人才科研启动基金资助项目(KKSY201721032)

王孝东,贺德幸,刘杰,等. 主进风竖井内罐笼提升活塞效应对平巷风流的影响[ J].煤炭学报,2023,48(S1):159-170.

WANG Xiaodong,HE Dexing,LIU Jie,et al. Influence of cage lifting piston effect on drift airflow in main intakeshaft[J]. Journal of China Coal Society,2023,48(S1):159-170