斜沟矿爆破掘进巷道粉尘非稳态分布规律数值模拟研究
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摘要
为了得到掘进工作面附近爆破和通风同时作用形成气相流场所致爆尘运移规律,指导通风系统和防尘系统的设计,以斜沟煤矿13采区集中辅运上山掘进工作面为背景进行爆破后的CFD模拟研究,并结合实际测量,以获得粉尘扩散规律、粉尘粒径沉降规律和粉尘浓度时间变化规律。模拟结果显示:距离地表垂高0.5m处粉尘浓度最高,距地表4m处粉尘浓度最低。粒径在90～200μm的几乎完全沉降;15μm以下的长时间悬浮;10μm以下的粉尘均匀分布于沿程空间各点。在1～5min之内,大颗粒迅速沉降;粉尘浓度在5min以后开始逐渐减少。距掘进工作面10～20m范围内粉尘浓度一直保持在较高水平。现场实测得到距工作面20m和25m范围内的粉尘浓度分布规律与数值模拟结果基本一致。
In order to obtain the law of explosion and dust movement caused by blasting and ventilation near the working face,and to guide the design of the ventilation system and dust control system,the working face of the concentrated mining road in the 13 mining area of the Xiegou coal mine is background CFD simulation study after blasting,combined with actual measurement,to obtain dust diffusion law,dust particle size settlement law and dust concentration time variation law.The simulation results show that the dust concentration is the highest at a height of 0.5 mfrom the surface,and the dust concentration is the lowest at4 mfrom the surface.The particle size is almost completely settled at 90-200μm;the long-term suspension below 15μm;the dust below 10μm is evenly distributed at various points along the path space.Within1-5 min,the large particles settle rapidly;the dust concentration begin to decrease gradually after 5 min.The dust concentration has been maintained at a high level within 10 to 20 mfrom the heading face.The distribution of dust concentration in the range of 20 mand 25 mfrom the working surface is basically consistent with the numerical simulation results.
In order to obtain the law of explosion and dust movement caused by blasting and ventilation near the working face,and to guide the design of the ventilation system and dust control system,the working face of the concentrated mining road in the 13 mining area of the Xiegou coal mine is background CFD simulation study after blasting,combined with actual measurement,to obtain dust diffusion law,dust particle size settlement law and dust concentration time variation law.The simulation results show that the dust concentration is the highest at a height of 0.5 mfrom the surface,and the dust concentration is the lowest at4 mfrom the surface.The particle size is almost completely settled at 90-200μm;the long-term suspension below 15μm;the dust below 10μm is evenly distributed at various points along the path space.Within1-5 min,the large particles settle rapidly;the dust concentration begin to decrease gradually after 5 min.The dust concentration has been maintained at a high level within 10 to 20 mfrom the heading face.The distribution of dust concentration in the range of 20 mand 25 mfrom the working surface is basically consistent with the numerical simulation results.
引文
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[2]邓飞,刘剑,陈善乐.掘进巷道压入式通风压能损失模拟研究[J].世界科技研究与发展,2015,37(5):494-497.DENG Fei,LIU Jian,CHEN Shanle.Simulation study on pressure loss in excavation roadway with forced ventilation[J].World Sci-Tech R&D,2015,37(5):494-497.
[3]李雨成,高军军,李智,等.金川龙首矿长距离掘进巷道爆破粉尘分布分析[J].有色金属工程,2016,6(2):69-74.LI Yucheng,GAO Junjun,LI Zhi,et al.Blasting dust distribution analysis of long distance driving roadway in Jinchuan Longshou mine[J].Nonferrous Metals Engineering,2016,6(2):69-74.
[4]李智.爆破掘进空间内粉尘非稳态运移规律与防尘系统设计研究[D].阜新:辽宁工程技术大学,2014.
[5]李雨成,刘天奇,李智,等.爆破掘进空间内粉尘非稳态运移规律研究[J].中国安全生产科学技术,2014,10(6):33-38.LI Yucheng,LIU Tianqi,LI Zhi,et al.Research on unsteady migration law of dust in blasting tunnelling space[J].Journal of Safety Science and Technology,2014,10(6):33-38.
[6]李雨成,李智,高伦.基于风流及粉尘分布规律的机掘工作面风筒布置[J].煤炭学报,2014,39(S1):130-135.LI Yucheng,LI Zhi,GAO Lun.Arrangement of air duct in tunneling working face based on the distribution laws of airflow and dust[J].Journal of China Coal Society,2014,39(S1):130-135.
[7]廖贤鑫,蒋仲安,牛伟,等.采场爆破粉尘运移规律的Fluent数值模拟[J].安全与环境学报,2012,12(6):43-46.LIAO Xianxin,JIANG Zhongan,NIU Wei,et al.Numerical simulations of blasting dust migration with the use of fluent in stope[J].Journal of Safety and Environment,2012,12(6):43-46.
[8]吴楠楠,郭楚文,夏爽.掘进巷道瓦斯运移多相流场实验研究[J].煤矿安全,2010,41(2):5-9.WU Nannan,GUO Chuwen,XIA Shuang.Experimental study on multiphase flow field of gas transportation in drivage tunnel[J].Safety in Coal Mines,2010,41(2):5-9.
[9]张宏,赵国栋,丁永杰,等.采煤机割煤过程中粉尘沿程分布运移的仿真与监测[J].煤矿机械,2009,30(9):62-64.ZHANG Hong,ZHAO Guodong,DING Yongjie,et al.Simulation and monitoring of transference on-way distribution of dust during process of coal mining machine cutting coal[J].Coal Mine Machinery,2009,30(9):62-64.
[10]秦跃平,张苗苗,崔丽洁,等.综掘工作面粉尘运移的数值模拟及压风分流降尘方式研究[J].北京科技大学学报,2011,33(7):790-794.QIN Yueping,ZHANG Miaomiao,CUI Lijie,et al.Numerical simulation of dust migration and study on dust removal modes with the forced ventilation shunt in a fully mechanized workface[J].Journal of University of Science and Technology Beijing,2011,33(7):790-794.
[11]秦跃平,姜振军,张苗苗,等.综掘面粉尘运移规律模拟及实测对比[J].辽宁工程技术大学学报:自然科学版,2014,33(3):289-293.QIN Yueping,JIANG Zhenjun,ZHANG Miaomiao,et al.Comparison of simulation on dust migration regularity in fully mechanized workface[J].Journal of Liaoning Technical University:Natural Science,2014,33(3):289-293.
[12]胡方坤,王帅领,王德明,等.基于CFD非定常模拟分析掘进面粉尘运移规律研究[J].中国煤炭,2013,39(3):105-108.HU Fangkun,WANG Shuailing,WANG Deming,et al.Unsteady simulation analysis of dust movement law at driving face based on CFD[J].China Coal,2013,39(3):105-108.
[13]胡方坤,时国庆,张义坤,等.基于非稳态DPM模拟研究长压短抽式掘进面粉尘运移规律[J].中国煤炭,2013,39(12):104-108.HU Fangkun,SHI Guoqing,ZHANG Yikun,et al.Simulation of dust migration law at heading face under far-pressing-nearabsorption ventilation base[J].China Coal,2013,39(12):104-108.
[14]贺光会.超长巷道炮掘时粉尘分布规律研究[J].现代矿业,2016,32(9):21-27.HE Guanghui.Dust distribution law of super-long roadway in the process of digging and blasting[J].Modern Mining,2016,32(9):21-27.
[15]杨靖.综掘面风幕控尘综合实验平台设计研究[D].阜新:辽宁工程技术大学,2014.
[16]吴斌,张义平,曾照凯,等.城市拆除爆破中的粉尘防护研究[J].矿业研究与开发,2011,31(2):98-100.WU Bin,ZHNAG Yiping,ZENG Zhaokai,et al.Study on dust prevention in urban demolition blasting[J].Mining Research and Development,2011,31(2):98-100.
[17]郭江江.综采工作面降尘系统实验研究及数值模拟[D].太原:太原科技大学,2018.
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