三相泡沫对综放面采空区漏风的影响规律
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摘要
为研究综放面上隅角埋管注三相泡沫时采空区漏风风流的变化规律,采用FLUENT软件进行模拟分析.模拟结果表明,当综放面倾角分别为0°,10°,30°时,三相泡沫在采空区沿工作面倾斜方向的扩散范围分别达到20～30,50～100,100～150m,大大地减少了采空区的漏风风量;同时,采空区氧化带带宽分别缩减为10～20,10～15,5～10m,模拟结果表明三相泡沫能有效地防治采空区的煤炭自燃.以新集二矿1606工作面为例,注三相泡沫后,采空区氧化带带宽由60m缩减为15m以内,漏风风量由原来的约200m3/min减少到约25m3/min,以此为依据制定的防灭火方案取得了很好的效果,表明了模拟结果跟现场实际基本吻合.
Fluent software was used to model air leakage at the goaf after injection of a three-phase foam.Air diffusion at three distances along the inclination direction were examined: from 10 to 20 m,from 50 to 100 m,and from 100 to 150 m.Three dip angles,0,10,and 30 degrees,were considered at the respective oxidation zone widths of 10 to 20 m,10 to 15 m,and 5 to 10 m.The simulations show that air leakage in the goaf can be significantly reduced.The three-phase foam has an obvious effect in preventing,and controlling,the spontaneous combustion of the coal.Three phase foam was applied to the goaf of the 1606,fully mechanized,caving face in the Xinji number 2 coal mine.The oxidation zone width was narrowed from a distance of 60 meters to 15 meters.The volume of air leakage was simultaneously decreased from about 200 to 25 m3/min.The simulations agree with the field observations.
Fluent software was used to model air leakage at the goaf after injection of a three-phase foam.Air diffusion at three distances along the inclination direction were examined: from 10 to 20 m,from 50 to 100 m,and from 100 to 150 m.Three dip angles,0,10,and 30 degrees,were considered at the respective oxidation zone widths of 10 to 20 m,10 to 15 m,and 5 to 10 m.The simulations show that air leakage in the goaf can be significantly reduced.The three-phase foam has an obvious effect in preventing,and controlling,the spontaneous combustion of the coal.Three phase foam was applied to the goaf of the 1606,fully mechanized,caving face in the Xinji number 2 coal mine.The oxidation zone width was narrowed from a distance of 60 meters to 15 meters.The volume of air leakage was simultaneously decreased from about 200 to 25 m3/min.The simulations agree with the field observations.
引文
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[2]王德明.矿井火灾学[M].徐州:中国矿业大学出版社,2008.
[3]王德明.矿井防灭火新技术:三相泡沫[J].煤矿安全,2004,35(4):16-18.WANG De-ming.A novel technology of mine firefighting:three-phrase foam[J].Safety in Coal Mines,2004,35(4):16-18.
[4]丁广骧,柏发松.采空区混合气运动基本方程及其有限元解法[J].中国矿业大学学报,1996,25(3):21-26.DING Guang-xiang,BAI Fa-song.Basic equations ofmixed-gas motion in gob and their finite element solu-tion[J].Journal of China University of Mining&Technology,1996,25(3):21-26.
[5]王济凯,鲍学彬,丁仰卫.采空区漏风流场的FLU-ENT数值模拟[J].山东煤炭科技,2009,1:86-87.WANG Ji-kai,BAO Xue-bin,DING Yang-wei.Nu-merical simulation on gob air leakage flow field byFLUENT[J].Shandong Coal Science and Technolo-gy,2009,1:86-87.
[6]时国庆,王德明,奚志林.基于FLUENT对采空区氧气浓度场的数值模拟[J].煤炭科学技术,2009,37(3):76-79.SHI Guo-qing,WANG De-ming,XI Zhi-lin.Numer-ical simulation of oxygen concentration distribution ingob areas based on FLUENT[J].Coal Science andTechnology,2009,37(3):76-79.
[7]奚志林,王德明,时国庆.三相泡沫在采空区中渗流特性的数值模拟[J].中国矿业大学学报,2009,38(3):341-345.XI Zhi-lin,WANG De-ming,SHI Guo-qing.Numer-ical simulation of the seepage characteristics of three-phase foam in the gob[J].Journal of China Universi-ty of Mining&Technology,2009,38(3):341-345.
[8]韩占忠,王敬,兰小平.FLUENT流体工程仿真计算实例与应用[M].北京:北京理工大学出版社,2008.
[9]王海宁.矿井风流流动与控制[M].北京:冶金工业出版社,2007.
[10]丁广骧.矿井大气与瓦斯三维流动[M].徐州:中国矿业大学出版社,1996.
[11]张永祥,陈鸿汉.多孔介质溶质运移动力学[M].北京:地震出版社,2000.
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