摘要
针对煤矿综采工作面粉尘浓度超标与作业环境恶化等问题,为保障企业安全生产的顺利进行和员工的职业健康,以柴家沟煤矿42222工作面为例,根据气固两相流理论,采用Gambit和Fluent软件构建巷道三维几何模型并进行数值模拟。当进风巷入口风速为1.2 m/s时,顶板和底板附近粉尘浓度较高,呼吸带高度上不易受自身重力而沉降的小颗粒粉尘较多,液压支架及人行道一侧风流速度过低,回风巷风流速度较高,巷道内通风风流速度过高或过低都不利于粉尘的沉降,所以在回风巷和液压支架及人行道附近区域应有针对性地加装防降尘设备,根据粉尘在巷道内的运移规律完善整体防尘体系。
Aiming at the problems of dust concentration exceeding standard and deterioration of working environment in fully mechanized coal mining operations,in order to guarantee the smooth progress of safety production in enterprises and the occupational health of employees,the 42222 working face of Chaijiagou Coal Mine is taken as an example.Based on gas-solid two-phase flow theory,three-dimensional geometric model of tunnel is built by Gambit and Fluent software.When the inlet wind speed of the air inlet tunnel is 1.2m/s,the dust concentration near the top and bottom plates is high.At the height of the breathing zone,there are more small particles are not susceptible to settle due to gravity.The air flow velocity on the side of the hydraulic support and the sidewalk is too law,but the air flow velocity in the return airway is high.High or low ventilation air speed in tunnel is not conducive to the dust settlement.Therefore,dust-proof equipment should be installed in the areas near the return lane,hydraulic supports and pavement.Improvement of the overall dust proof system could be done according to the dust movement law in the tunnel.
作者
程根银
侯佳音
司俊鸿
杨联恒
邓鹏飞
李林
CHENG Genyin;HOU Jiayin;SI Junhong;YANG Lianheng;DENG Pengfei;LI Lin(School of Mechanical and Electrical Engineering,North China Institute of Science and Technology,Yanjiao,065201,China;School of Safety Engineering,North China Institute of Science and Technology,Yanjiao,065201,China;Yuhua Coal Mine,Tongchuan Mining Co.,Ltd,Tongchuan,727200,China)
出处
《华北科技学院学报》
2020年第6期29-34,共6页
Journal of North China Institute of Science and Technology
基金
国家自然科学基金面上项目(52074122)
河北省高等学校科学技术研究项目(Z2018004)
中央高校基本科研业务费资助(3142018003)。
关键词
综采工作面
粉尘运移
气固两相流
数值模拟
fully mechanized working face
dust transport
gas-solid two-phase flow
numerical simulation
