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某金矿掘进工作面粉尘浓度分布及影响因素分析
- 作者：
- 秦汝祥|彭世政|谢志旭
- 作者单位：
- 安徽理工大学安全科学与工程学院|中国黄金集团江西金山矿业有限公司|中国黄金集团江西金山矿业有限公司
基金项目：
- 国家自然科学基金项目（51874007）
详细信息：
- 作者简介：
- 秦汝祥（1975—）,男,教授,博士,从事矿井通风与除尘技术方面的研究工作;E-mail:448646434@qq.com
- 通讯作者：
- isnull
- PDF下载
Analysis of dust concentration distribution and its influencing factors in gold mining
- English Author：
- School of Safety Science and Engineering,Anhui University of Science and Technology|Jiangxi Jinshan Mining Co.,Ltd.,China National Gold Group Co.,Ltd.|Jiangxi Jinshan Mining Co.,Ltd.,China National Gold Group Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
金属非金属地下矿山掘进巷道钻孔、爆破、铲装等作业工序产生大量岩尘,导致井巷空间粉尘浓度高,危害职工健康和影响作业环境。以某金矿掘进巷道为研究对象,建立掘进巷道压入式通风模型,依据气固两相流理论,结合现场测定数据,利用Fluent软件分析风筒布不同布置条件下除尘效果,得出巷道内粉尘运移规律和风速分布情况。研究发现:风机压入风流在掌子面附近形成涡流,携带粉尘在掌子面附近涡旋,不利于粉尘的排出,风筒布出口距掌子面7～8 m风流逐渐稳定流向回风巷;当风筒布出口距掌子面8 m,高度为1.5 m时,巷道内粉尘排出较快,除尘效果最为理想。研究结果对指导掘进工作面粉尘防治具有一定的指导意义。
关键词:
粉尘浓度;计算流体力学;通风除尘;数值模拟;两相流理论
Abstract:
A large amount of rock dust is produced during the drilling,blasting,shoveling,and loading of the metal and non-metal underground mines and causes high dust concentration in the shaft space and endangers the health of workers and the working environment.Given that,in this paper,the tunneling roadway of a gold mine is taken as the research object,and the forced ventilation model of the tunneling roadway is established.According to the gas-solid two-phase flow theory combined with the field measurement data,the dust removal effect under different arrangement conditions of the air duct cloth is analyzed by using Fluent software,and the dust migration law and the wind speed distribution in the roadway are obtained.The research finds that the forced airflow of the fan forms a vortex near the face that carries dust in a vortex around the face which is not conducive to the discharge of dust,and the airflow about 7-8 m away from the face gradually flows to the return air lane;when the outlet of the air duct is 8 m away from the face and the height is 1.5 m,the dust in the tunnel is discharged quickly and the dust removal effect is the most ideal.The research results have a certain guiding significance for the prevention and control of dust in the tunneling face.
Keywords:
dust concentration;computational fluid dynamics;ventilation and dust removal;numerical simulation;two-phase flow theory
