综采面截煤产尘风流-粉尘运移规律研究
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摘要
针对综采工作面截煤产尘量大的问题,利用Fluent软件模拟分析了综采面截煤产尘的风流-粉尘运移规律,重点研究了工作面不同位置粉尘横向及高度方向上的扩散规律,并与现场实测值进行了对比。研究结果表明:采煤机中心上风侧4 m到下风侧10 m的空间为"高浓度粉尘区";从采煤机中心下风侧20 m处开始,在呼吸带高度上出现了"粉尘沉降低浓度带";采煤机中心下风侧30 m之前,粉尘沉降明显,采煤机中心下风侧30 m之后,粉尘明显向顶板扩散;数值模拟结果与现场实测结果符合较好。
Aiming at the problem of large dust production of coal cutting in fully-mechanized working face, simulated and analyzed the wind-dust migration regularity of coal cutting in fully-mechanized working face by Fluent software. The diffusion law of dust in transverse direction and height direction at different positions of working face is mainly studied. And compared with the field measured values.The results of the study show that the space from the upper wind side 4 m of the coal shearer center to the lower wind side 10 m is "high concentration dust area". The "low concentration zone of dust deposition" appears at the height of the respiratory zone starting from the lower wind side 20 m of the coal shearer center. The dust settlement is obvious before the lower wind side 30 m of the coal shearer center, and the dust diffuses obviously to the roof direction after there. The numerical simulation results are in good agreement with the field measured results.
Aiming at the problem of large dust production of coal cutting in fully-mechanized working face, simulated and analyzed the wind-dust migration regularity of coal cutting in fully-mechanized working face by Fluent software. The diffusion law of dust in transverse direction and height direction at different positions of working face is mainly studied. And compared with the field measured values.The results of the study show that the space from the upper wind side 4 m of the coal shearer center to the lower wind side 10 m is "high concentration dust area". The "low concentration zone of dust deposition" appears at the height of the respiratory zone starting from the lower wind side 20 m of the coal shearer center. The dust settlement is obvious before the lower wind side 30 m of the coal shearer center, and the dust diffuses obviously to the roof direction after there. The numerical simulation results are in good agreement with the field measured results.
引文
[1]中华人民共和国国家卫生和计划生育委员会.关于2014年职业病防治工作情况的通报[EB/OL].(2015-12-3). http://www.nhfpc.gov.cn/jkj/s5899t/201512/c5a99f823c5d4dd48324c6be69b7b2f9.shtml.
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[2]杨胜来.综采工作面粉尘运移和粉尘浓度三维分布的数值模拟研究[J].中国安全科学学报,2001(4):64-67.
[3]刘荣华.综采工作面隔尘理论及应用研究[D].长沙:中南大学,2010.
[4]刘荣华,李夕兵,施式亮,等.综采工作面隔尘空气幕出口角度对隔尘效果的影响[J].中国安全科学学报,2009,19(12):128-134,205.
[5]蒋仲安,金龙哲,袁绪忠,等.掘进巷道中粉尘分布规律的实验研究[J].煤炭科学技术,2001,29(3):43-45.
[6]王晓珍,蒋仲安,王善文,等.煤巷掘进过程中粉尘浓度分布规律的数值模拟[J].煤炭学报,2007(4):386-390.
[7]傅贵,张江石,潘结南,等.工作面粉尘污染状况研究[J].煤炭学报,2006(1):63-66.
[8]许满贵,刘欣凯,文新强,等.煤矿综采工作面粉尘分布及运移规律研究[J].西安科技大学学报,2014,34(5):533-538.
[9]刘毅,蒋仲安,蔡卫,等.综采工作面粉尘运动规律的数值模拟[J].北京科技大学学报,2007,29(4):351-353,362.