掘进巷道湿喷施工过程粉尘弥散规律研究
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摘要
为了研究长压短抽通风条件下湿喷施工作业产尘在掘进巷道空间内的弥散规律,应用Fluent软件中的离散相模型,对湿喷中的初喷施工产尘、复喷施工与凿岩机破岩同时作业时产尘进行数值模拟,得到了粉尘在巷道中的弥散规律。研究结果表明:压风侧初喷作业粉尘质量浓度高于抽风侧初喷作业粉尘质量浓度,且掘进巷道端头附近尤为明显;压风侧或抽风侧复喷施工与凿岩机破岩同时作业时,粉尘质量浓度变化规律均为沿程先降低,后因复喷作业而升高,然后再降低。根据粉尘弥散规律,提出了相应的防尘建议,以减轻粉尘对施工作业人员的危害。
In order to study the dispersion rule of wet-spraying dust in excavation roadway under far-pressing-nearing-absorption,the discrete phase model in Fluent software was applied to simulate the dust production in the initial spray of wet spraying,dust production as spray construction and drill break the rock at the same time,the dispersion law of dust in roadway was obtained. Research results show that the dust concentration of the press air side initial spray is higher than the air pumping side initial spray,and it is particularly obvious near the end of the excavation roadway; when the press air side or air pumping side multiple spray and drill breaks the rock at the same time,the change rule of dust mass concentration is first reduced along the exit direction of the roadway,then increased due to multiple spray produces dust,and then decreased again. According to the rules of dust dispersion,some suggestions are made to reduce the damage of dust to workers.
In order to study the dispersion rule of wet-spraying dust in excavation roadway under far-pressing-nearing-absorption,the discrete phase model in Fluent software was applied to simulate the dust production in the initial spray of wet spraying,dust production as spray construction and drill break the rock at the same time,the dispersion law of dust in roadway was obtained. Research results show that the dust concentration of the press air side initial spray is higher than the air pumping side initial spray,and it is particularly obvious near the end of the excavation roadway; when the press air side or air pumping side multiple spray and drill breaks the rock at the same time,the change rule of dust mass concentration is first reduced along the exit direction of the roadway,then increased due to multiple spray produces dust,and then decreased again. According to the rules of dust dispersion,some suggestions are made to reduce the damage of dust to workers.
引文
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[12]杜扬柱.湿喷工艺在新安煤矿的应用技术实践[J].煤矿现代化,2014(4):21-23.
[13] WANG H,CHENG W,SUN B,et al. Effects of radial air flow quantity and location of an air curtain generator on dust pollution control at fully mechanized working face[J].Advanced Powder Technology,2017,28(7):1780-1791.
[14]聂文,马骁,程卫民,等.通风条件影响长压短抽掘进面粉尘扩散的仿真实验[J].中南大学学报(自然科学版),2015(9):3346-3353.
[15]蒋仲安,闫鹏,陈举师,等.岩巷掘进巷道长压短抽通风系统参数优化[J].煤炭科学技术,2015,43(1):54-58.
[2]谢中强.锚喷支护巷道喷浆作业粉尘分布规律的数值模拟[J].煤矿开采,2012,17(3):96-99.
[3]任广信,贾国平,杨晋,等.湿喷工艺在大巷掘进初期的研究与应用[J].煤炭与化工,2013,36(9):23-24.
[4]耿凡,周福宝,罗刚.煤矿综掘工作面粉尘防治研究现状及方法进展[J].矿业安全与环保,2014,41(5):85-89.
[5]聂文,张琦,白若男,等.巷道湿喷作业风流—粉尘运移规律的数值模拟[J].安全与环境学报,2015,15(5):73-77.
[6]周刚,张琦,程卫民,等.煤矿锚喷作业区喷浆粉尘数值模拟与新型湿喷一体机研制[J].中南大学学报(自然科学版),2016(2):606-614.
[7]于欣,陈连军,刘国明.喷浆作业粉尘分布影响因素的数值模拟[J].矿业研究与开发,2017,37(2):97-101.
[8] LIU Q,NIE W,HUA Y,et al. The effects of the installation position of a multi-radial swirling air-curtain generator on dust diffusion and pollution rules in a fullymechanized excavation face:A case study[J]. Powder Technology,2018,329:371-385.
[9] CAO W,GAO W,PENG Y,et al. Experimental and numerical study on flame propagation behaviors in coal dust explosions[J].Powder Technology,2014,266:456-462.
[10] YANG L,XUE L,LI G,et al.Numerical prediction effects of particle-particle collisions on gas-particle flows in swirl chamber[J]. Energy Conversion&Management,2011,52(3):1748-1754.
[11] NAZIF H R,TABRIZIH B. Development of boundary transfer method in simulation of gas-solid turbulent flow of a riser[J].Applied Mathematical Modelling,2013,37(4):2445-2459.
[12]杜扬柱.湿喷工艺在新安煤矿的应用技术实践[J].煤矿现代化,2014(4):21-23.
[13] WANG H,CHENG W,SUN B,et al. Effects of radial air flow quantity and location of an air curtain generator on dust pollution control at fully mechanized working face[J].Advanced Powder Technology,2017,28(7):1780-1791.
[14]聂文,马骁,程卫民,等.通风条件影响长压短抽掘进面粉尘扩散的仿真实验[J].中南大学学报(自然科学版),2015(9):3346-3353.
[15]蒋仲安,闫鹏,陈举师,等.岩巷掘进巷道长压短抽通风系统参数优化[J].煤炭科学技术,2015,43(1):54-58.
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