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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.
In order to study the variation law of air leakage in gob of buried-pipe three-phase foam in upper corner of fully mechanized caving face, the simulation was carried out by using FLUENT software.The simulation results show that when the fully mechanized caving mining face inclination is 0 °, 10 °, 30 ° , The diffusion range of three-phase foam in the goaf along the working face is 20 ~ 30, 50 ~ 100 and 100 ~ 150m, respectively, which greatly reduces the amount of air leakage in the goaf. At the same time, the band width of the oxidation zone in the goaf decreases The simulation results show that the three-phase foam can effectively prevent and control spontaneous combustion of coal in the goaf. Taking 1606 working face of Xinji No.2 mine as an example, after the three-phase foam is injected, the gob area The band width of the oxidation zone is reduced from 60m to 15m, the amount of leakage air is reduced from about 200m3 / min to about 25m3 / min, and the fire prevention and extinguishing scheme based on this has achieved very good results, indicating that the simulation results are basically consistent with the actual field conditions Anastomosis.